Limitations of Infrared Thermometers

Infrared thermometers are extremely useful when used in the right way and for the right applications. However, before you can develop confidence in their ability to give fast temperatures, you must understand their limitations.


Infrared thermometers:

  • Only measure surface temperatures and NOT the internal temperature of food or other materials
  • Require adjustments depending on the surface being measured
  • Can be temporarily affected by frost, moisture, dust, fog, smoke or other particles in the air
  • Can be temporarily affected by rapid changes in ambient temperature
  • Can be temporarily affected by proximity to a radio frequency with an electromagnetic field strength of three volts per meter or greater
  • Do not see through glass, liquids or other transparent surfaces - even though visible light like a laser passes through them (i.e. if you point an IR gun at a window, you'll be measuring the temperature of the window pane, not the outside temperature).


* In some cases, Infrared Thermometers can be MORE accurate than a surface probe because surface probes have their own temperature and can affect the surface being measured by coming into contact with it.

  • RayTemp 3 Infrared Thermometer - ideal for the foodservice industry±1 °C accuracy over the critical food range circular laser for precise targeting compact, lightweight & easy to use temperature range -60 to 500°C

    £60.00 ex VAT
    £72.00   inc VAT

    in stock
    in stock
  • RayTemp® 6 Infrared Thermometer with circular laser for precise targetingmax/min, display hold & backlight functions adjustable emissivity for multi-surface temperature range -60 to 550 °C robust IP54 splashproof casing

    £62.50 ex VAT
    £75.00   inc VAT

    in stock
    in stock
  • BlueTherm® IR Bluetooth infra-red thermometersecurely transmits data up to 20 metres eliminates wires, cables & connectors temperature range -49.9 to 249.9°C Android (179-400) or iOS (179-402) versions available meets the European Standard EN 13485Please contact us for more information

    £130.00 ex VAT
    £156.00   inc VAT

  • RayTemp® 38 infrared non-contact thermometer for measuring small surface areas at greater distancesauto-power off & backlight functions wide temperature range -59.9 to 999.9°C robust housing for durability target distance/diameter ratio of 50:1 RayTemp® 38 is sold excluding probe

    £185.00 ex VAT
    £222.00   inc VAT

    in stock
    in stock


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