Thermistor probes

High accuracy thermistor probes for measuring semi-solids, liquids and air temperatures. Ideal for food and laboratory applications.
Thermistor probes

Thermistor probes have high accuracy (up to ±0.2 °C) and are ideal for applications such as food processing and service, where precision is critical.

They typically come in immersion and air temperature models. Despite having a narrower temperature range than thermocouple probes, they are suitable for sub-zero temperatures (down to -40 °C) due to the PVC and fluoroethylene-propylene leads that they usually feature.

ETI has a range of thermistor sensors for different applications, but can also create bespoke options if you cannot find what you need.

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  • Therma 20 Colour Coded Penetration Probe - White

    Therma 20 Colour Coded Penetration Probe

    Therma 20 Colour Coded Penetration Probe
    £37.00
    £44.40 inc. VAT
    £37.00 £37.00
    £44.40 inc. VAT
  • Fast Response Therma 20 Temperature Probe

    Fast Response Therma 20 Temperature Probe

    Fast Response Therma 20 Temperature Probe
    £42.00
    £50.40 inc. VAT
    £42.00 £42.00
    £50.40 inc. VAT
  • Between Pack Temperature Probe

    Between Pack Temperature Probe

    Between Pack Temperature Probe
    £55.50
    £66.60 inc. VAT
    £55.50 £55.50
    £66.60 inc. VAT
  • Heavy Duty NTC Thermistor Probe with T-shaped Handle 1000mm

    Heavy Duty NTC Thermistor Probe with T-shaped Handle 1000mm

    Heavy Duty NTC Thermistor Probe with T-shaped Handle 1000mm
    £97.00
    £116.40 inc. VAT
    £97.00 £97.00
    £116.40 inc. VAT
  • Therma 20 Penetration Probe -300mm

    Therma 20 Penetration Probe -300mm

    Therma 20 Penetration Probe -300mm
    £40.00
    £48.00 inc. VAT
    £40.00 £40.00
    £48.00 inc. VAT
  • Replacement probe for Indoor/Outdoor Thermometer

    Replacement probe for Indoor/Outdoor Thermometer

    Replacement probe for Indoor/Outdoor Thermometer
    £4.00
    £4.80 inc. VAT
    £4.00 £4.00
    £4.80 inc. VAT
  • 170-100 pH Thermistor Penetration Probe

    170-100 pH Thermistor Penetration Probe

    170-100 pH Thermistor Penetration Probe
    £33.50
    £40.20 inc. VAT
    £33.50 £33.50
    £40.20 inc. VAT
  • Penetration Probe for EcoTemp®

    Penetration Probe for EcoTemp®

    Penetration Probe for EcoTemp®
    £11.00
    £13.20 inc. VAT
    £11.00 £11.00
    £13.20 inc. VAT
  • Foil Between Pack NTC Temperature Probe

    Foil Between Pack NTC Temperature Probe

    Foil Between Pack NTC Temperature Probe
    £29.00
    £34.80 inc. VAT
    £29.00 £29.00
    £34.80 inc. VAT
  • Penetration Probe - 810-935

    Penetration Probe - 810-935

    Penetration Probe - 810-935
    £7.00
    £8.40 inc. VAT
    £7.00 £7.00
    £8.40 inc. VAT
  • Replacement probe for Therma-Hygrometer

    Replacement probe for Therma-Hygrometer

    Replacement probe for Therma-Hygrometer
    £5.00
    £6.00 inc. VAT
    £5.00 £5.00
    £6.00 inc. VAT
  • Thermistor Food Simulant Temperature Probe

    Thermistor Food Simulant Temperature Probe

    Thermistor Food Simulant Temperature Probe
    £42.50
    £51.00 inc. VAT
    £42.50 £42.50
    £51.00 inc. VAT
  • T-shaped Penetration Probe for Therma 20

    T-shaped Penetration Probe for Therma 20

    T-shaped Penetration Probe for Therma 20
    £46.00
    £55.20 inc. VAT
    £46.00 £46.00
    £55.20 inc. VAT
  • 170-101 pH Thermistor Penetration Probe

    170-101 pH Thermistor Penetration Probe

    170-101 pH Thermistor Penetration Probe
    £33.50
    £40.20 inc. VAT
    £33.50 £33.50
    £40.20 inc. VAT
  • Therma 20 Air or Gas Probe

    Therma 20 Air or Gas Probe

    Therma 20 Air or Gas Probe
    £38.50
    £46.20 inc. VAT
    £38.50 £38.50
    £46.20 inc. VAT
  • NTC Thermistor Waterproof Temperature Probe with Lumberg Connector

    NTC Thermistor Waterproof Temperature Probe with Lumberg Connector

    NTC Thermistor Waterproof Temperature Probe with Lumberg Connector
    £43.50
    £52.20 inc. VAT
    £43.50 £43.50
    £52.20 inc. VAT
  • 1.5m Air Wire Probe for EcoTemp®

    1.5m Air Wire Probe for EcoTemp®

    1.5m Air Wire Probe for EcoTemp®
    £8.50
    £10.20 inc. VAT
    £8.50 £8.50
    £10.20 inc. VAT
  • T-shaped NTC Thermistor Corkscrew Probe

    T-shaped NTC Thermistor Corkscrew Probe

    T-shaped NTC Thermistor Corkscrew Probe
    £125.00
    £150.00 inc. VAT
    £125.00 £125.00
    £150.00 inc. VAT
  • 100mm Waterproof Stainless Steel Therma 20 Penetration Probe

    100mm Waterproof Stainless Steel Therma 20 Penetration Probe

    100mm Waterproof Stainless Steel Therma 20 Penetration Probe
    £62.00
    £74.40 inc. VAT
    £62.00 £62.00
    £74.40 inc. VAT
  • Oven Penetration Probe for EcoTemp®

    Oven Penetration Probe for EcoTemp®

    Oven Penetration Probe for EcoTemp®
    £8.50
    £10.20 inc. VAT
    £8.50 £8.50
    £10.20 inc. VAT
  • 3 m Air Wire Probe for EcoTemp®

    3 m Air Wire Probe for EcoTemp®

    3 m Air Wire Probe for EcoTemp®
    £8.50
    £10.20 inc. VAT
    £8.50 £8.50
    £10.20 inc. VAT
  • Air or Gas Wire NTC Temperature Probe

    Air or Gas Wire NTC Temperature Probe

    Air or Gas Wire NTC Temperature Probe
    £23.50
    £28.20 inc. VAT
    £23.50 £23.50
    £28.20 inc. VAT
  • Damped Air Temperature Probe

    Damped Air Temperature Probe

    Damped Air Temperature Probe
    £52.00
    £62.40 inc. VAT
    £52.00 £52.00
    £62.40 inc. VAT

What are the different types of thermistor probes?

Penetration

Perfect for measuring the internal temperature of liquids and semi-solids with high accuracy. Available in waterproof, fast response and colour-coded options to suit varying applications. Ideal for food safety, medical, and laboratory use where precision is essential.

Between-pack

Designed for checking the temperature of packaged goods, ensuring food safety during storage and transport. These probes slide easily between boxes or vacuum-sealed packs to provide accurate readings without opening the packaging.

Slow response

Dampened air and food simulant probes are designed to mimic product temperatures rather than react to rapid air fluctuations. Ideal for cold storage and food safety monitoring, they help maintain accurate temperature control.

Frequently Asked Questions

What is a thermistor probe?

A thermistor probe is a temperature sensor that uses a thermistor to measure temperature. It offers excellent accuracy over a limited temperature range and is commonly used in food production, catering, healthcare and laboratory applications.

What are thermistor probes used for?

Thermistor probes are used wherever precise temperature measurement is important. Common applications include food preparation and storage, refrigeration, vaccine monitoring and laboratories.

How do I choose the right thermistor probe?

Choose a probe based on what you're measuring. Penetration probes are ideal for foods semi-solids, and liquids, while air probes measure ambient temperature. Also consider the required accuracy and temperature range.

Read our probe buying guide to learn more.

Can thermistor probes measure very high temperatures?

Thermistor probes are best suited to low and medium temperature applications. For very high temperatures, a thermocouple probe is usually the better choice because it can withstand much higher operating temperatures.

How do I recalibrate my thermometers and probes?

You can send your equipment to ETI’s UKAS calibration laboratory for accredited recalibration. We will return your instruments to you within their specified accuracy range and with a new calibration certificate.

Learn more about our UKAS calibration services.