OIL SAMPLING & CONDITION MONITORING

The Complete Guide to Oil Sampling

Accurate oil analysis starts with an accurate sample. This guide explains how to collect representative oil samples, choose the right sampling equipment and establish a consistent sampling procedure for effective condition monitoring.


Whether you are sampling lubricating oil, hydraulic oil, diesel, transformer oil or other industrial fluids, the quality and consistency of your sampling process can have a significant impact on the value of your analysis results.

✓

What you'll learn

Practical guidance for collecting better oil samples.

   ✓ How to take a representative oil sample


   ✓ Where and when to take an oil sample

   

    ✓ Choosing bottles, pumps and sampling valves

 

    ✓ How to prevent sample contamination

 

    ✓ How to label and handle samples


    ✓ Using sampling for condition monitoring

01

Representitive Sampling

Collect samples that accurately reflect fluid condition.

02

Consistent procedures

Repeatable sampling helps identify meaningful trends.

03

Sampling & analysis

Equipment and analysis working together for condition monitoring.

Understanding oil sampling

Why good oil sampling matters

Oil analysis can provide valuable information about the condition of a lubricant and the machinery in which it operates. However, laboratory analysis can only assess the sample that is submitted. If the sample is contaminated, taken from the wrong location or collected using an inconsistent method, the results may not give an accurate picture of what is happening inside the machine.


A good oil sampling procedure is therefore an important part of any condition monitoring programme. The aim is to collect a representative sample, protect it from contamination, record the relevant machine information and use the same sampling procedure consistently over time.

 

When sampling is carried out consistently, oil analysis results can be compared over time to help identify changes in lubricant condition, contamination and wear. This can give maintenance teams useful information when planning inspections, maintenance and other corrective actions.

!

The quality of the sample affects the value of the analysis.

The objective is not simply to collect a quantity of oil. The sample should be representative of the component or system being monitored and collected using a clean, repeatable procedure.

OIL SAMPLING & CONDITION MONITORING

The Complete Guide to Oil Sampling

Accurate oil analysis starts with an accurate sample. This guide explains how to collect representative oil samples, choose the right sampling equipment and establish a consistent sampling procedure for effective condition monitoring.

Whether you are sampling lubricating oil, hydraulic oil, diesel, transformer oil or other industrial fluids, the quality and consistency of your sampling process can have a significant impact on the value of your analysis results.

Shop Oil Sampling Equipment Learn About Oil Analysis
Representative sampling Collect samples that accurately reflect fluid condition.
Consistent procedures Repeatable sampling helps identify meaningful trends.
Sampling & analysis Equipment and analysis working together for condition monitoring.
Understanding oil sampling

Why good oil sampling matters

Oil analysis can provide valuable information about the condition of a lubricant and the machinery in which it operates. However, laboratory analysis can only assess the sample that is submitted. If the sample is contaminated, taken from the wrong location or collected using an inconsistent method, the results may not give an accurate picture of what is happening inside the machine.

A good oil sampling procedure is therefore an important part of any condition monitoring programme. The aim is to collect a representative sample, protect it from contamination, record the relevant machine information and use the same sampling procedure consistently over time.

When sampling is carried out consistently, oil analysis results can be compared over time to help identify changes in lubricant condition, contamination and wear. This can give maintenance teams useful information when planning inspections, maintenance and other corrective actions.

The quality of the sample affects the value of the analysis.

The objective is not simply to collect a quantity of oil. The sample should be representative of the component or system being monitored and collected using a clean, repeatable procedure.

Explore the guide

Oil Sampling Guide: What We'll Cover

From choosing the right sampling point to selecting the appropriate equipment and sending your sample for analysis, this guide covers the key principles and practical steps involved in effective oil sampling.

01

Understanding Oil Sampling

Start with the fundamentals of sampling and understand why representative samples matter.

  1. What Is Oil Sampling?
  2. Why Is Oil Sampling Important?
  3. What Is a Representative Oil Sample?
02

Taking an Oil Sample

Learn where, when and how to collect an oil sample using a consistent and representative procedure.

  1. Where Should You Take an Oil Sample?
  2. When Should You Take an Oil Sample?
  3. How to Take an Oil Sample Step-by-step sampling procedure
  4. Oil Sampling Methods
03

Equipment & Best Practice

Find out what equipment you need and how to protect your sample from contamination.

  1. What Equipment Do You Need?
  2. Choosing an Oil Sampling Bottle
  3. Oil Sampling Pumps
  4. Oil Sampling Valves & Fixed Sampling Points
  5. How to Avoid Oil Sample Contamination
  6. How to Label & Handle an Oil Sample
04

From Sampling to Analysis

Understand what happens after sampling and how oil analysis can support condition monitoring.

  1. What Happens After You Take a Sample?
  2. Oil Sampling by Application
  3. Common Oil Sampling Mistakes
  4. How to Create an Oil Sampling Programme
  5. Oil Sampling Best Practice Checklist
  6. Oil Sampling FAQs
Looking for equipment?

Shop Oil Sampling Equipment

Browse sampling kits, bottles, pumps, valves and other equipment for collecting representative fluid samples.

View Sampling Equipment
Oil Sampling Fundamentals

What Is Oil Sampling?

Oil sampling is the process of collecting a representative sample of lubricant or fluid from machinery so that it can be examined for signs of wear, contamination and changes in fluid condition.

Oil sampling is an important part of condition monitoring and preventative maintenance. By regularly collecting samples from machinery and comparing the results over time, maintenance teams can gain an insight into the condition of both the lubricant and the equipment in which it is operating.

The purpose of sampling is not simply to collect a quantity of oil. The sample needs to be representative of the lubricant or system being monitored. Where the sample is taken, when it is taken and how it is collected can all influence the quality and usefulness of the resulting analysis.

Oil samples can be collected from a wide range of equipment and systems, including hydraulic systems, gearboxes, engines, compressors, turbines and other industrial machinery. Depending on the application, sampling may be carried out using a fixed sampling valve, vacuum sampling pump, drain point or another suitable sampling method.

What Can Oil Sampling Tell You?

Once a representative sample has been collected, it can be sent for laboratory analysis. The tests performed depend on the application and the objectives of the monitoring programme, but oil analysis can provide information about several important aspects of machine and lubricant condition.

Wear

Analysis can identify elements and particles associated with component wear, helping to identify changes that may require further investigation.

Contamination

Samples can be examined for contaminants such as dirt, water, fuel, coolant or other substances that may affect lubricant or machine performance.

Lubricant Condition

Analysis can help assess changes in lubricant condition, including properties that may indicate degradation or changes in service life.

Trends Over Time

Repeated samples collected consistently can create a trend that helps identify changes in machine or lubricant condition.

Oil Sampling vs Oil Analysis

Although the terms are often used together, oil sampling and oil analysis are two different parts of the same condition-monitoring process.

01

Oil Sampling

The collection of a representative sample from the machine or system using an appropriate sampling method and equipment.

02

Oil Analysis

Laboratory testing of the sample to identify information about lubricant condition, contamination and wear.

03

Maintenance Decision

Results can be reviewed alongside machine history and trends to determine whether further investigation or action is appropriate.

Why Is a Representative Sample Important?

Laboratory analysis can only assess the sample that is submitted. If the sample does not accurately represent the condition of the lubricant or component being monitored, the resulting data may be difficult to interpret or may not reflect the actual condition of the machine.

A representative sample depends on more than the laboratory test itself. The sampling location, sampling equipment, cleanliness of the equipment, timing of the sample and consistency of the sampling procedure can all influence the result.

Good oil analysis starts with good sampling.

A consistent sampling procedure helps ensure that changes in analysis results are more likely to represent genuine changes in the machine or lubricant rather than differences in how the samples were collected.

Continue learning

Learn More About Oil Sampling

How to Take an Oil Sample A practical step-by-step sampling guide Oil Sampling Methods Compare common methods and sampling points Oil Sampling Equipment Explore bottles, pumps, valves and kits
The Importance of Oil Sampling

Why Is Oil Sampling Important?

Regular oil sampling can provide valuable information about lubricant condition, contamination and equipment wear, helping maintenance teams make better-informed decisions about machinery condition and maintenance.

Machinery can often show changes in condition before a component fails or a performance problem becomes obvious. Oil sampling and analysis provide one way of monitoring these changes by examining the lubricant while the machine remains in service.

As lubricant circulates through a machine, it can carry information about the environment in which it operates. Wear particles, contaminants and changes in lubricant properties can provide useful indications of what is happening inside the equipment.

When samples are collected consistently and analysed at appropriate intervals, the results can be compared over time. This creates a historical record that can support condition monitoring and help maintenance teams identify changes that may warrant further investigation.

Why sample oil?

What Can Regular Oil Sampling Help You Monitor?

01

Machinery Wear

Wear particles and elements found within a lubricant can provide information about changes occurring within machine components.

Monitoring results over time can help identify developing trends and highlight equipment that may require further investigation.

02

Contamination

Water, dirt, dust, fuel, coolant and other unwanted substances can affect lubricant and equipment performance.

Oil sampling can help identify changes in contamination levels so that potential sources can be investigated.

03

Lubricant Condition

Lubricants change during service. Heat, oxidation, contamination and operating conditions can all affect lubricant condition.

Sampling and analysis can help determine whether the lubricant continues to meet the requirements of the application.

04

Changes Over Time

A single oil sample provides a snapshot. A programme of consistent sampling creates a much more useful history of machine and lubricant condition.

Trends can make changes easier to identify and investigate.

05

Maintenance Planning

Oil analysis results can provide additional information when deciding whether equipment requires inspection, further testing or maintenance.

This can support a more informed approach to maintenance planning.

06

Equipment Reliability

Consistent oil sampling forms part of a broader condition-monitoring strategy designed to understand how critical equipment is performing over time.

This can help maintenance teams focus attention where it is most needed.

What Happens When Oil Sampling Is Not Used?

Without regular condition information, maintenance teams may have fewer opportunities to identify changes developing between scheduled inspections or maintenance activities.

A machine can continue operating while contamination, lubricant degradation or component wear develops. By the time a problem becomes apparent through noise, temperature, vibration or performance changes, the condition may require more investigation or intervention.

Oil sampling does not replace other condition-monitoring techniques. Instead, it provides another source of information that can be considered alongside operating data, inspection findings, vibration monitoring, thermography and other maintenance information.

A wider maintenance strategy

Oil Sampling as Part of Condition Monitoring

Oil sampling is most valuable when it forms part of a structured condition-monitoring programme rather than being treated as an occasional test.

01 Establish

Identify critical equipment and appropriate sampling points.

02 Sample

Collect representative samples using a consistent procedure.

03 Analyse

Test samples to assess lubricant, contamination and wear-related information.

04 Trend

Compare results over time to identify meaningful changes.

05 Act

Investigate significant changes and make informed maintenance decisions.

i
Oil sampling is a monitoring tool — not a guarantee of failure prevention.

Oil analysis results should be interpreted in context, alongside machine history, operating conditions and other available condition-monitoring information. An abnormal result does not automatically mean that a component has failed, but it can provide a reason for further investigation.

From sampling to analysis

Good Sampling Is the Starting Point

The value of oil analysis depends on the quality and consistency of the samples being submitted. Choosing the correct sampling location, equipment and procedure is therefore an important part of establishing an effective monitoring programme.

How to Take an Oil Sample Explore Oil Sampling Methods Choose Sampling Equipment
Need oil analysis?

Find Out More About FA-ST

Learn more about oil sampling, analysis and condition monitoring services.

Explore FA-ST Services
Oil Sampling Fundamentals

What Is a Representative Oil Sample?

A representative oil sample is one that accurately reflects the condition of the lubricant and the equipment being monitored at the time the sample is taken.

A laboratory can only analyse the oil that is submitted to it. If the sample has been collected from an unsuitable location, contaminated during collection or handled inconsistently, the results may not accurately reflect the condition of the machine or lubricant.

This is why the sampling process is an important part of an oil analysis programme. Producing reliable results starts before the sample reaches the laboratory.

A good sampling procedure aims to collect oil from a location where the sample is representative of the system being monitored, using clean and appropriate equipment and a consistent method each time.

✓
In simple terms

A representative sample should tell you about the machine, not about the sampling process.

The objective is to minimise anything introduced or changed during sampling that could distort the information contained within the oil.

Five important considerations

What Makes an Oil Sample Representative?

Several factors can influence whether an oil sample provides useful and repeatable information. These factors should be considered together rather than treated as separate steps.

01

Sampling Location

Where the sample is collected can have a significant influence on what the sample represents.

A sample should be taken from a location that provides useful information about the equipment or lubricant condition being monitored. The most appropriate location will depend on the machine, lubrication system and monitoring objective.

Learn about sampling locations
02

Sampling Method

Different machines and applications require different approaches to collecting an oil sample.

Fixed sampling valves, vacuum sampling pumps, drain points and other methods can all have appropriate applications. The method should be selected according to the equipment and sampling point.

Explore oil sampling methods
03

Clean Sampling Equipment

Sampling equipment should be clean and suitable for the application. Dirt, moisture, residues or other material introduced during sampling can affect the sample.

Bottles, containers, tubing, pumps and other sampling components should therefore be selected and handled with the intended analysis in mind.

Explore sampling equipment
04

Consistent Sampling

Samples become more useful when they are collected in a consistent way.

Using the same sampling location and method wherever practical makes it easier to compare results and identify genuine changes over time.

Explore sampling best practice
05

Sampling Timing

The operating condition of equipment can influence the information contained within an oil sample.

Sampling at a consistent point within the equipment's operating cycle, where appropriate, can make results easier to compare from one sample to the next.

Learn about sampling consistency
Avoiding poor samples

What Can Affect an Oil Sample?

A sample can be affected before, during or after the collection process. Understanding these potential influences is an important part of developing a reliable sampling procedure.

!
Dirty sampling equipment

Residues or contaminants from equipment can become part of the sample.

!
Poor sampling location

A sample taken from an unsuitable point may not represent the area of the system being monitored.

!
Inconsistent sampling

Changing the sampling location or method can make trends harder to interpret.

!
External contamination

Dirt, moisture and other materials can enter the sample during collection or handling.

!
Incorrect handling

Poor labelling, storage or handling can compromise the usefulness of a sample.

!
Unclear sampling procedure

Different operators using different procedures can introduce unnecessary variation.

The importance of consistency

One Sample Is Useful. A Consistent Sampling Programme Is More Powerful.

A single oil sample can provide information about the condition of a lubricant at a particular point in time. However, repeated samples collected consistently allow results to be compared and trends to be identified.

For this reason, a sampling programme should aim to standardise the sampling location, equipment, procedure and other relevant conditions wherever practical.

Sample 1 Baseline
Sample 2 Compare
Sample 3 Trend
Sample 4 Investigate
Practical checklist

Before Taking an Oil Sample

Before collecting a sample, consider the following questions.

01

Am I sampling from the correct location?

02

Is the sampling equipment clean and appropriate?

03

Am I using the same method used for previous samples?

04

Is the machine operating under an appropriate condition for sampling?

05

Is the sample container suitable for the analysis?

06

Will the sample be correctly identified and handled?

✓
Key takeaway

Sample quality matters.

The objective of oil sampling is to collect a sample that provides a reliable representation of the lubricant and equipment being monitored. Correct location, appropriate equipment, cleanliness and consistency all contribute to producing useful samples for analysis.

Continue the guide

Where Should an Oil Sample Be Taken?

Choosing the right sampling point is one of the most important decisions in an oil sampling programme. The next section looks at common sampling locations and the factors that should be considered when selecting one.

Explore Sampling Locations
Oil Sampling Locations

Where Should an Oil Sample Be Taken?

Choosing the right sampling point is one of the most important parts of collecting a representative oil sample. The best location depends on the equipment, lubrication system and information you want the sample to provide.

Not every point within a lubrication system will provide the same information. Oil can change as it moves through bearings, gears, hydraulic components, filters, reservoirs and other parts of a machine.

A sample taken from a quiet area of a reservoir, for example, may provide different information from a sample taken from oil flowing through a return line after it has passed through working components.

The objective is therefore not simply to find a convenient place to collect oil. The sampling point should be selected because it provides useful information about the condition being monitored.

01
The key principle

Sample where the information you need is most likely to be found.

A good sampling point should provide a representative sample while allowing the sample to be collected safely, consistently and with minimal risk of external contamination.

Common sampling points

Where Can Oil Samples Be Collected?

Different machinery and lubrication systems require different sampling approaches. The following are common locations that may be considered when designing an oil sampling programme.

01 Reservoir

Reservoir or Sump

Reservoirs and sumps are common sampling locations for many lubrication systems.

Care should be taken to avoid sampling from areas where material has settled or where the oil may not be representative of the circulating system.

Consider: Where within the reservoir will the sample best represent the circulating oil?
02 Return Line

Return Line

A return line can provide useful information about oil returning from working components before it reaches the reservoir.

Depending on the application, this can make a return-line sampling point useful for monitoring changes generated within the equipment.

Consider: Is the sample being taken after the component or area you want to monitor?
03 Pressure Line

Pressurised Sampling Point

Some systems provide dedicated sampling points within pressurised oil circuits.

Where a pressurised sampling point is used, the sampling equipment must be appropriate for the system pressure and designed for safe sample collection.

Consider: Is the sampling equipment suitable for the pressure and application?
04 Filter

Before or After a Filter

Sampling around filtration equipment can provide different information depending on whether the sample is taken upstream or downstream of the filter.

This can be particularly relevant when investigating contamination or assessing filtration performance.

Consider: What are you trying to determine about the filtration process?
05 Drain Point

Drain Point

Drain points can sometimes be used for oil sampling, particularly where no dedicated sampling point has been installed.

However, the location and sampling procedure need to be considered carefully because material can accumulate in low points or stagnant areas.

Consider: Could settled material or stagnant oil influence the sample?
06 Circulating Oil

Active Flow Location

A location where oil is actively circulating can sometimes provide a more useful representation of the current condition of the system.

The precise location should still be selected according to the equipment design and monitoring objective.

Consider: Is the oil flowing and representative of the area being monitored?
Choosing the right point

What Makes a Good Sampling Location?

The ideal sampling location will vary between machines, but there are several characteristics that can help guide the decision.

01
Representative

The sample should represent the oil or area of equipment being monitored.

02
Repeatable

The location should allow samples to be collected consistently over time.

03
Accessible

Operators should be able to collect samples without unnecessary difficulty.

04
Clean

The sampling point should minimise the risk of external contamination.

05
Safe

Samples should be collected using a procedure and equipment appropriate for the application.

Sampling location matters

Be Careful Around Dead Zones and Settled Material

Oil systems can contain areas where oil movement is limited. Particles, water or other material may settle in these locations rather than remaining representative of the circulating lubricant.

A sample taken from a stagnant area may therefore provide information about that specific area rather than the overall condition of the circulating system.

This does not mean that these locations are never useful. In some investigations, settled material or material from a low point may be exactly what needs to be examined. The important point is to understand what the sampling location represents.

OIL FLOW
→ → →
Active flow
● Sampling point
Stagnant / low area
Sampling around filtration

Before or After the Filter?

When investigating filtration or contamination, the position of the sampling point relative to a filter can affect what the sample tells you.

UPSTREAM

Before the Filter

Can provide information about the oil before it passes through the filtration stage.

  • ✓ Useful when investigating incoming contamination
  • ✓ Can support filtration investigations
FILTER
↓
DOWNSTREAM

After the Filter

Can provide information about the oil after it has passed through the filtration stage.

  • ✓ Useful when assessing filtered oil condition
  • ✓ Can support comparison of filtration performance
Making sampling easier

Dedicated Sampling Points

Where regular sampling is required, installing a dedicated sampling point can make the collection process more consistent and repeatable.

Dedicated sampling valves can provide a defined location for routine sampling, helping operators return to the same point each time rather than relying on temporary or improvised collection methods.

View Sample Valves
Low Pressure Sampling solutions for lower-pressure systems.
Pressurised Systems Sampling equipment designed for applicable pressurised systems.
Repeatable Sampling A defined sampling point can support consistent collection.
Sampling point checklist

Before Selecting a Sampling Location

Consider these questions before installing or using a sampling point.

01

What part of the machine am I trying to monitor?

02

Is the oil flowing at the sampling location?

03

Could particles or water settle at this location?

04

Can the same point be used for future samples?

05

Can samples be collected safely?

06

Is the sampling equipment suitable for the system?

✓
Key takeaway

The best sampling point is not always the easiest one.

Sampling location should be selected according to the information required from the sample. A well-chosen, accessible and repeatable sampling point can make an oil analysis programme considerably more useful.

Continue the guide

Oil Sampling Methods

Once the sampling location has been selected, the next step is choosing an appropriate method for collecting the sample. Explore vacuum pumps, sampling valves, drain points and other approaches.

Explore Sampling Methods
Section 7

Oil Sampling Methods

Once the correct sampling location has been identified, the next step is choosing the most appropriate method for collecting the sample. Different machinery and sampling points require different approaches.

01

Sampling Valves

Dedicated sampling valves provide a defined and repeatable point from which oil can be collected. They are particularly useful for machinery that requires routine condition monitoring.

Explore Sampling Valves →
02

Vacuum Sampling Pumps

Vacuum sampling pumps can be used to extract oil from reservoirs, sumps and other locations where a dedicated sampling valve is not available.

Explore Sample Pumps →
03

Drain Sampling

Drain points can sometimes be used for sample collection. The position of the drain and the condition of the oil at the sampling point should be considered carefully.

04

Syringe Sampling

Single-use syringes can provide a convenient option for certain sampling applications, particularly where only occasional samples are required.

View Sampling Equipment →
The right method depends on the application.

Sampling equipment should be selected according to the sampling location, fluid, system pressure, required sample volume and contamination-control requirements.

Section 8

Choosing the Right Oil Sampling Equipment

The equipment used to collect an oil sample can have a significant effect on the quality and repeatability of the sampling process. The objective is to create a system that allows samples to be collected safely, consistently and with minimal contamination.

Application Possible solution Why it may be suitable
Dedicated sampling point Sampling valve Provides a repeatable sampling location.
Reservoir or sump Vacuum sampling pump Allows oil to be drawn through tubing into a sampling container.
Occasional sampling Single-use syringe Convenient where a dedicated sampling system is not required.
Multiple machines Complete sampling kit Provides a consistent collection of equipment for field sampling.
Sampling Valves Dedicated sampling points → Sample Pumps Vacuum sampling equipment → Sampling Kits Complete sampling solutions → Sample Bottles Containers for collected samples →
Section 9

How to Take an Oil Sample

Good oil sampling is about more than simply collecting oil in a bottle. A consistent procedure helps reduce contamination and improves the reliability of results over time.

01

Identify the correct sampling point

Use the established sampling location for the machine and make sure it represents the condition you are trying to monitor.

02

Prepare the equipment

Ensure the bottle, tubing, pump, valve and any other equipment are clean and appropriate for the application.

03

Prepare the sampling point

Clean the sampling point and surrounding area before collecting the sample to reduce the possibility of external contamination.

04

Collect the sample

Collect the required quantity using the appropriate sampling equipment and procedure for the system.

05

Secure the container

Close the sample container promptly and ensure it is clearly identified.

06

Record the sample

Record the machine, sampling point, date, operating conditions and other relevant information.

!
Safety first

Sampling procedures must always take account of the equipment manufacturer's instructions, system pressure, temperature and site safety requirements. Never attempt to sample from a pressurised system using equipment that is not designed for that application.

Section 10

Avoiding Contamination During Oil Sampling

Contamination can enter a sample before it reaches the laboratory. If the sample is contaminated during collection, the laboratory result may not accurately represent the condition of the machine.

01

Dirty sampling points

Dirt around the sampling point can enter the sample during collection.

02

Dirty equipment

Pumps, tubing and other reusable equipment should be managed appropriately to avoid transferring contamination between samples.

03

Incorrect containers

Sampling containers should be suitable for the intended application and analysis.

04

Poor handling

Leaving containers open or handling them unnecessarily can increase the opportunity for contamination.

Remember

The sample is only as good as the sampling process.

Good laboratory analysis cannot compensate for a poor, contaminated or unrepresentative sample.

Section 11

Sample Bottles, Containers & Tubing

The container is the final part of the physical sampling process, but it is an important part of protecting the integrity of the sample between collection and analysis.

01

Sample Bottles

Suitable sample bottles provide a controlled container for collected oil and help simplify identification, handling and transportation.

View Sample Bottles →
02

Sample Tubing

Tubing can be used with vacuum sampling pumps and other sampling equipment to transfer oil from the sampling location into the container.

View Sampling Equipment →
03

Complete Sampling Kits

For organisations carrying out routine sampling across multiple machines, a complete kit can simplify equipment storage and standardise the collection process.

View Sampling Kits →
Section 12

Sending Your Oil Sample for Analysis

Once a sample has been collected, the next stage is getting it to the laboratory with enough information for the results to be interpreted correctly.

01

Collect

Take a representative sample using the correct equipment and procedure.

02

Identify

Clearly identify the machine, sample point and other relevant information.

03

Submit

Send the sample to the laboratory using the appropriate packaging and submission process.

04

Analyse

Laboratory testing provides information about the condition of the lubricant and potential contaminants.

05

Act

Use the findings alongside equipment knowledge and maintenance information to determine the appropriate response.

Oil analysis

Turn an oil sample into useful maintenance information.

FA-ST provides independent oil analysis alongside sampling equipment and technical support.

Explore FA-ST Services →
Section 13

Understanding Your Oil Analysis Report

An oil analysis report contains measurements and observations that can help identify changes in lubricant condition, contamination and potential equipment problems.

Wear Metals

Certain metals can indicate wear occurring within machinery. Trends over time can be particularly useful when assessing changes.

Contamination

Water, dirt, process contamination and other unwanted material can affect lubricant performance and equipment condition.

Lubricant Condition

Changes in lubricant properties can provide information about degradation, oxidation or other changes in service.

Particle Information

Particulate information can help identify contamination and changes occurring within the system.

Think in trends

One result is useful. A history of results can be much more powerful.

Establishing a consistent sampling programme allows results to be compared over time and can make developing changes in equipment or lubricant condition easier to identify.

Section 14

What Should You Do When Oil Analysis Finds a Problem?

An abnormal result should not automatically mean that equipment needs to be shut down or that the oil needs to be replaced. Results need to be considered in context.

01

Review

Review the result and compare it with previous samples where available.

02

Investigate

Consider whether the result could indicate contamination, lubricant degradation or equipment wear.

03

Confirm

Where appropriate, obtain additional information or a follow-up sample.

04

Respond

Take the appropriate maintenance or fluid-management action based on the findings.

05

Monitor

Continue sampling to establish whether the condition has stabilised or changed.

Sampling can lead to action

Analysis identifies a problem. Filtration may be part of the solution.

Where contamination is identified, an appropriate fluid cleaning or filtration strategy may help restore and maintain fluid condition.

Explore Oil Filtration →
Section 15

Building an Effective Oil Sampling Programme

The greatest value from oil analysis comes when sampling becomes part of a structured condition-monitoring programme rather than an occasional response to a problem.

01

Identify critical assets

Prioritise machinery where lubricant condition and equipment reliability are particularly important.

02

Establish sampling points

Select representative, accessible and repeatable sampling locations.

03

Standardise the method

Use consistent equipment and procedures so samples can be compared over time.

04

Set sampling intervals

Establish an appropriate sampling frequency based on equipment criticality and operating conditions.

05

Track the results

Maintain a history of results so developing trends can be identified.

06

Take action

Use the information to support maintenance, contamination control and fluid-management decisions.

✓
The objective

Move from reactive maintenance towards informed, condition-based decisions.

A structured sampling programme can help organisations understand lubricant and equipment condition before a developing issue becomes an unexpected failure.

Need help with oil sampling?

From sampling equipment to oil analysis, we can help.

Whether you are establishing a new sampling programme, looking for sampling equipment or need independent oil analysis, FA-ST can provide practical technical support throughout the process.

View Sampling Kits → Explore FA-ST →
Sampling Equipment Valves, pumps, bottles and kits
Oil Analysis Laboratory analysis and reporting
Technical Support Practical guidance for sampling programmes
Filtration Fluid cleaning and contamination control