Specs:
Display method
Measurement function
Measurement method
temperature accuracy
maximum humidity
Humidity accuracy
Country
Standard
$152.00
SE
TSINGTAO TOKY HM550 gas temperature and humidity Measurement Instrument, humidity range 10-95RH%
Integrated-20~60℃10~95%RH
Can measure humidity, temperature, wet bulb temperature value, humidity range 10-95RH%, accuracy 2.5% ± 1% RH, using backlit liquid crystal display.

$295.00
SE
Topco HD600 dewpoint meter, humidity, temperature wet-bulb temperature dewpoint temperature
-10~60℃-20~40℃
Microprocessor control ensures stability, measurement speed and wide range, small size for easy portability, backlit LCD display is clear and power-saving, and supports MAX Maximum hold and automatic shutdown.

$203.00
SE
TSINGTAO TOKY HM580 Portable Thermohygrometer Humidity range 10-95RH%
Split-20~60℃10~95%RH
Measurement of humidity, temperature, wet bulb temperature value, humidity range 10-95RH%, using precision digital Sensors, Sampling Time is 0.4s.

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