The ETI 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.
 
The Therma Differential is supplied excluding probe
 
Range 0.1°C:
-99.9 to 299.9 °C
Range 1°C:
300 to 1372 °C
Max/Min:
Yes
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
Backlight:
Yes
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