Specs:
Display method
Measurement function
Measurement method
temperature accuracy
maximum humidity
Humidity accuracy
Country
Standard
$271.00
SE
LANDTEK HT6292 dew point measurement gas temperature/Relative Humidity/dew point
-10-60℃10~95%RH

$288.00
SE
AMITTARI AH-192D Humidity dew point Tester, temperature/Humidity/dew point
-10~60℃10~95%RH-40~40℃
Microcomputer technology implementation of rapid precision measurement, temperature range -10~60 ℃ accuracy +/- 0.5 ℃, automatic memory Humidity MAX Maximum MIN Minimum and final Measured value.

$271.00
SE
LANDTEK HT-1292D portable dew point instrument dewpoint temperature -40~40 ℃
-10~60°C(14~ 140 °F)10~95%RH-40~40°C(- 40~104 °F)
No need to connect pipes, temperature range -10~60 ℃, Measuring humidity, temperature, wet-bulb temperature, dewpoint temperature, automatic memory Humidity and temperature value.

If you don't know how to choose "Thermohygrometer", please consult customer service.