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Considerations when using Infrared Thermometers

It is not as simple as some suppliers would have you believe. Its not, point, pull the trigger and read the measurement

Infrared Thermometers are equipped with optics that measure radiated heat. All objects have the ability to absorb and emit radiated heat but at differing values. There are 2 important factors that can drastically affect the accuracy of a measured value, these being Spot Size and Emissivity

Infrared Thermometers’ Spot Size

Infrared thermometers measure the temperature of a flat surface area.

The spot size is the ratio based on the distance from the thermometer to the object being measured. The nearer to the object the smaller the area of measurement

When an infrared thermometer is equipped with a laser, the laser dot indicates the centre point of the area being measured, not the focal point of measurement.

Measurements should be made as near to the object as possible. The thermometer can measure at reasonable distances but the accuracy of the reading can be affected by external sources such as dust, smoke, steam and even light.

It has to be considered that when taking measurements from a distance the surface spot size could include surface areas not intended to be measured

Infrared Thermometers’ Emissivity

Emissivity is a term based on an objects ability to emit radiated heat. The scale is from 0.1 to 1.00 and takes into account the colour, the surface finish and reflective nature of the object to be measured.

0.1 is the emissivity value associated to very shinny objects such as steel. 1.00 is the value associated to matt black

Some infrared thermometers feature adjustable Emissivity but it is very difficult for a user to accurately determine the correct value taking into consideration the whole colour spectrum and taking into account reflective nature of the intended object to be measured

The error in the accuracy of a measured value can be as much as 30% of the reading just based on the emissivity

A simple way to overcome this is to paint a small area of the object to be measured Matt Black or paint a piece of masking tape Matt Black and stick it to the surface of the object to be measured. Blackboard paint or an aerosol from a car accessory shop will do. It’s not the thickness of the paint but it has to be solid in colour.

Infrared Thermometers’ Calibration

ATP offer traceable calibration on infrared thermometers. When we calibrate infrared thermometers we use a certified black body with an emissivity value of 0.95.

Our standard Calibration Certificate is issued at 25°, 50°, 75°, 100° and 150°C. Additional points are available up to 300°C @ £8.00 per point

If you need any further technical information or advice on a specific application please call our Technical Support Department who will be pleased to help you: 01530 566804

What Is Infrared Technology?

It's important to understand what infrared technology is - infrared thermometers are an invaluable, affordable tool for businesses specialising in transportation, construction, environmental monitoring, electrical installation, and security.

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Infrared thermometers from ATP:

Pocket Infrared Thermometer - 330°C

This pocket size and easy-to-use pocket infrared thermometer is ideal for precise non-contact measurement of surface temperatures. Suitable for monitoring appliances, heating, ventilation & air conditioning systems, food preparation and storage temperatures. Find out more about this Pocket Infrared Thermometer.

Pocket Laser Infrared thermometer - 270°C

This pocket size and easy-to-use pocket laser infrared thermometer with Class II laser sighting is ideal for precise non-contact measurement of surface temperatures. Suitable for food preparation, monitoring appliances, HVAC, transport & automotive and storage temperatures. Find out more about this Pocket Laser Infrared Thermometer.

2 in 1 Infrared Thermometers with Penetration Probe

This pocket size and easy-to-use 2-in-1 infrared thermometer is used for non-contact measurement of surface temperatures and a stainless steel folding penetration probe for core temperature measurements. This combination is ideal for hygiene temperature measuring in food preparation & food service applications. Find out more about this 2 in 1 Infrared Thermometer with Penetration Probe.

Laser Infrared Thermometer - 200°C

This pocket size and easy-to-use laser infrared thermometer with Class II laser sighting is ideal for non-contact measurement of surface temperatures. Suitable for a food preparation, plant & general maintenance, HVAC, transport & automotive, asphalt, health & safety, diesel and fleet maintenance. Find out more about this Laser Infrared Thermometer.

Dual Laser Infrared Thermometer - 450°C

This compact dual laser infrared thermometer (450°C) provides fast and accurate non-contact measurement of most surface temperatures. Suitable for a wide range of applications including plant & general maintenance, HVAC, transport & automotive and health & safety. Find out more about this Dual Laser Infrared Thermometer - 450°C.

Dual Laser Infrared Thermometer - 650°C

This compact dual laser infrared thermometer (650°C) with adjustable emissivity provides fast and accurate non-contact measurement of surface temperatures. Suitable for a wide range of applications including plant & general maintenance, HVAC, transport & automotive and health & safety. Find out more about this Dual Laser Infrared Thermometer - 650°C.

High Temperature Infrared Thermometer - 550°C

This high temperature infrared thermometer (550°C) with Class II laser sighting are ideal for fast, easy and accurate non-contact measurement of most surface temperatures. Suitable for a wide range of applications including plant & general maintenance, HVAC, transport & automotive and health & safety. Find out more about this High Temperature Infrared Thermometer - 550°C.

High Temperature Infrared Thermometer - 1100°C

This high temperature infrared thermometer (1100°C) with Class II laser sighting are ideal for fast, easy and accurate non-contact measurement of most surface temperatures. Suitable for a wide range of applications including plant & general maintenance, HVAC, transport & automotive and health & safety. Find out more about this High Temperature Infrared Thermometer - 1100°C.

Wireless USB Dual laser Infrared Thermometer

This wireless USB laser infrared thermometer (1050°C) with a wireless USB interface, Class II dual laser sighting and K-Type temperature measurements is ideal for fast, easy and accurate measurements. Suitable for a wide range of applications including plant & general maintenance, HVAC, transport & automotive and health & safety. Find out more about this Wireless USB Laser Infrared Thermometer - 1050°C.

High Temperature Infrared Thermometer - 1600°C

This high temperature infrared thermometer (1600°C) with Class II laser sighting are ideal for fast, easy and accurate non-contact measurement of most surface temperatures. Suitable for a wide range of applications including plant & general maintenance, HVAC, transport & automotive and health & safety. Find out more about this High Temperature Infrared Thermometer - 1600°C.

Single Input K-Type & IR Thermometer

This single input K-Type & IR thermometer offers high accuracy and fast response times with an infrared temperature probe for non-contact measurements. These instruments are suitable for industrial and laboratory use. Find out more about this Single Input K-Type & IR Thermometer.

Dual Input K-Type & IR Thermometer

This dual input K-Type & IR thermometer offers high accuracy and fast response times with an infrared temperature probe for non-contact measurements. These instruments are suitable for industrial and laboratory use. Find out more about this Dual Input K-Type & IR Thermometer.

If you need any further technical information or advice on a specific application please call our Technical Support Department who will be pleased to help you: 01530 566804