Therma Differential Two Channel Differential Thermometer

£90.00 ex VAT

£108.00 inc VAT

Therma differential thermometer two channel, T1 or T2 or T1 minus T2 differential thermometer

  • Robust waterproof case offering IP66/67 protection
  • Ideal for radiator balancing or HVAC applications
  • Designed for plumbers, reliable & easy to use
  • Backlight, max/min & hold functions
  • Polygiene BioMaster product protection

Sold excluding probes

Add Matched Accessories

Add calibration certificate 10/14 working days

UKAS 5 Point - 2 Input Simulation Certificate (-18, 0, +40, +70, +100°C)

UKAS 5 Point - 2 Input Simulation Certificate (-18, 0, +40, +70, +100°C)

UKAS 5 point - instrument & 2 probes (-18, 0, +40, +70, +100°C) *probes required for calibration

UKAS 5 point - instrument & 2 probes (-18, 0, +40, +70, +100°C) *probes required for calibration


Add a probe

Add other accessories

Add probe wipes

Add cases, boots & holders

in production - delivery 10-14 working days
Product code: 231-022
Biomaster Protected Made in UK BRCGS

The Therma Differential digital thermometer is an ideal HVAC thermometer as it 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.

The Therma Differential is priced excluding probe. To add recommended probes and other accessories select your choices from the 'Add Accessories'.

ETI offers an extensive range of interchangeable type K thermocouple probes, for a variety of different applications, click here for full range.


Product Details

Data sheet

Range 0.1°C:-99.9 to 299.9 °C
Range 1°C:300 to 1372 °C
Resolution:0.1 °C to 299.9 °C thereafter 1 °C
Accuracy:±0.4 °C ±0.1% of reading
Battery:3 x 1.5 volt AAA
Battery Life:7500 hours
Sensor Type:K thermocouple
Display: 15mm LCD
Dimensions:32 x 71 x 141mm
Weight:220 grams
Case Material: ABS plastic includes Biomaster product protection
Country of Manufacture: United Kingdom
Guarantee: two years
Water/Dust Resistance: IP66/67 protection
Measurement Scale: Celsius
Certification: FREE traceable calibration certificate

Specific References

Reviews (1)
Therma Waterproof & Diff manual

Therma Waterproof/Differential instructions

Download (473.45KB)
231-022 C of C

231-022 Therma Differential certificate of conformity

Download (70.94KB)

Sign in


My Wishlist0

Your cart

There are no more items in your cart