Thermistor Probes

A core part of ETI’s probe range is the Thermistor probe series. These probes are unique in that the have a negative temperature co-efficient – this means they experience a decrease in electrical resistance when their temperature is raised. Thermistor probes are not recommended for the measurement of surface temperatures but are ideal for working in sub-zero temperatures (down to -40 °C) due to the PVC and fluoroethylene-propylene leads that can be used to manufacture them. Where requirements cannot be met from the existing standard range of probes, alternative designs can be manufactured.

Common thermistor probe types

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.

Top Sellers

Load more
Product code: 174-266
Brand: N/A
£43.50

Waterproof NTC thermistor penetration probe with lumberg connector

  • Suitable for liquids, semi-solids and granular materials
  • Response time less than five seconds.
  • Probe temperature range -40 to 150 °C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Ø3.3 x 130mm
£43.50
In stock
Product code: 174-168
Brand: N/A

300mm NTC thermistor penetration probe for Therma 20 thermometer

  • Ideal for liquids, semi-solids and more
  • Probe temperature range -40 to 150°C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Ø3.3 x 300mm
£40.00
In stock
Product code: 174-300
Brand: N/A
£38.00

Air or gas temperature probe for Therma 20 thermometer.

  • Measures air temperature in cold areas
  • Response time less than 2 seconds.
  • Probe temperature range -40 to 150°C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Ø3.3 x 130mm
£38.00
In stock
Product code: 174-060
Brand: N/A

Between pack temperature probe measures temperature between packs and boxes 

  • Response time less than 3 seconds.
  • Probe temperature range -40 to 150 °C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Ø6 x 130 mm
£50.00
In stock
Product code: 174-100
Brand: N/A
£40.00

Fast response Therma 20 NTC thermistor needle penetration probe

  • Response time less than four seconds.
  • Probe temperature range -40 to 150 °C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Ø2.6 x 130mm
£40.00
In stock
Product code: 174-166
Brand: N/A
£35.00

Colour-coded NTC thermistor penetration probe for Therma 20 thermometer

  • Ideal for liquids, semi-solids and more
  • Probe temperature range -40 to 150 °C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Ø3.3 x 130mm
Product code: 172-382
Brand: N/A

Liquid Temperature Probe for ETI Data Loggers

  • ideal for pharmaceutical applications
  • one, two or 3-metre lead options
  • response time < 6 seconds
  • temperature range -40 to 125 °C
  • accuracy ±0.4 °C between -20 & 100 °C
  • Ø3.3 x 100 mm
£58.00
Select options
in production - delivery 10-14 working days
Product code: 172-006
Brand: N/A

Designed for use in food storage applications

  • Simulates food temperature in fridges, freezers etc.
  • Maximum probe temperature 150°C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Ø8 x 30mm with 1000mm FEP lead
£44.00
in production - delivery 10-14 working days
Product code: 172-000
Brand: N/A
£52.00

Waterproof stainless steel penetration probe

  • Ideal for liquids and semi-solids
  • Response time less than 4 seconds
  • Probe temperature range -40 to 150°C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Ø3.3 x 100mm
£52.00
Last items in stock
Product code: 172-168
Brand: N/A

General purpose data logger probe.

  • Wide range of applications
  • Response time less than 6 seconds
  • Probe temperature range -40 to 125 °C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Ø3.3 x 300mm
£53.00
In stock
Product code: 172-350
Brand: N/A

Food simulant temperature probe for data logger

  • Use in fridges, freezers and cold rooms
  • Probe temperature range -20 to 100 °C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • One metre PUR/PVC lead
  • 9 x 100 x 100mm
£65.50
in production - delivery 10-14 working days
Product code: 172-090
Brand: N/A

Foil between pack temperature probe.

  • use to measure between packs & boxes.
  • one metre PUR/PVC lead
  • 40 x 50 mm with a 1 m PUR/PVC lead
£65.00
in production - delivery 10-14 working days
Product code: 172-015
Brand: N/A

Data Logger Extension Lead.

  • use to extend logger reach
  • integral Lumberg connector
  • 150mm PVC lead
£54.00
Last items in stock
Product code: 172-372
Brand: N/A

Air or gas data logger temperature probe

  • Use in chill cabinets, fridges/freezers etc
  • Response time less than 6 seconds
  • Probe temperature range -40 to 125 °C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Ø3.7 x 30 mm with a 1 m lead
Product code: 172-011
Brand: N/A
£43.00

General purpose data logger probe

  • Wide range of applications
  • 3 lead lengths available, 1000mm, 2000mm and 3000mm
  • Response time less than six seconds
  • Probe temperature range -40 to 125 °C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Ø3.3 x 100mm
Product code: 810-085
Brand: N/A
£3.00

replacement probe for the 810-080 Indoor/outdoor thermometer

  • 3m water-resistant silicone lead
  • easy, rapid and accurate temperature measurements
  • temperature range -49.9 to 69.9 °C
£3.00
In stock
Product code: 810-158
Brand: N/A
£4.50

Replacement probe for the 810-155 Therma-Hygrometer

  • supplied with a 3 m water-resistant silicone lead
  • temperature range -49.9 to 69.9 °C
£4.50
In stock
Product code: 810-935
Brand: N/A
£6.50

Replacement penetration probe for 810-930 Max/Min thermometer

  • dimensions Ø3.5 x 120 mm
  • supplied with a 1 m PVC lead
  • temperature range -49 to 149 °C
£6.50
In stock
Product code: 810-955
Brand: N/A
£8.00

oven penetration probe for 810-950 EcoTemp

  • ideal for monitoring joints of meat in the oven
  • dimensions Ø3.3 x 160 mm and Ø2 mm reduced tip 
  • supplied with 1 m braided lead
£8.00
In stock
Product code: 810-954
Brand: N/A

air wire probe for EcoTemp thermometer

  • 1.5 m silicone air wire probe
  • supplied with a suction cup for easy mounting
  • temperature range -49.9 to 199.9 °C
£8.00
In stock
Product code: 810-952
Brand: N/A
£8.50

air wire probe for 810-950 EcoTemp thermometer

  • ideal for air temperature measurement
  • 3 m silicone lead 
  • suction cup for easy mounting
£8.50
In stock
Product code: 810-951
Brand: N/A
£10.50

Replacement penetration probe for the 810-950 EcoTemp thermometer

  • temperature range -49.9 to 199.9 °C
  • dimensions Ø3.5 x 125 mm
  • supplied with a 700 mm silicone connecting lead
£10.50
In stock
Product code: 170-136
Brand: N/A

Heavy Duty T-shaped penetration probe

  • Ideal for industrial or food processing
  • Response time less than 15 seconds
  • Probe temperature range -40 to 150 °C
  • Accuracy ±0.4 °C between -20 & 100 °C
  • Reinforced, stainless steel probe with reduced tip
  • probe dimensions Ø9.5 x 1000 mm
£90.00
Last items in stock
Product code: 170-100
Brand: N/A

pH Thermistor penetration probe for 8100 Plus pH & temperature meter - 170-100 

  • Replacement probe for 8100 Plus pH kit
  • Probe dimensions Ø3.3 x 100 mm
  • Response time less than 4 seconds
£32.00
In stock

Your cart

There are no more items in your cart

Sign in

SHOP