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ETI Therma Differential Thermometer

Part No : 231-022

Quick Overview

Therma differential thermometer robust waterproof case offering IP66/67 protection

Please select your probe

Availability: In stock

Regular Price: £75.00

Special Price: £67.50


The NEW Therma Differential digital thermometer allows the user to use two type K thermocouple probes simultaneously. The display can be switched to show probe T1 or T2 temperature or the difference between probes T1 and T2 (T1-T2). This allows, for example, the temperature drop across radiators or the temperature rise or fall of two items to be measured. 

The Therma Differential measures temperature over the range of -99.9 to 299.9 °C with a 0.1 °C resolution or 300 to 1372 °C with a 1 °C resolution. The thermometer features a custom, LCD display with °C, T1, T2, diff, hold, open circuit, low battery indication and an optional backlight. The unit incorporates an auto-power off facility that automatically turns the instrument off after approximately ten minutes, maximising battery life. 

Each thermometer is housed in a durable, ABS case that has an integrated rubber seal to ensure complete water tightness and help reduce the possibility of damage in harsh environments.


Therma Differential thermometer

range 0.1°C

-99.9 to 299.9°C

range 1°C

300 to 1372°C


0.1 °C to 299.9°C thereafter 1°C


±0.4 °C ±0.1 % of reading


3 x 1.5 volt AAA

battery life

7500 hours

sensor type

K thermocouple


15mm LCD


32 x 71 x 141mm


220 grams

  • case material: ABS plastic
  • display type: LCD with backlight
  • probe/sensor style: no probe included
  • power source: battery powered
  • country of manufacture: United Kingdom
  • warranty: two years
  • certification: traceable calibration certificate
  • power saving: auto-off
  • measurement scale: Celsius/Fahrenheit
  • display hold: yes
  • max/min function: yes
  • battery monitor: yes
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