One thermometer bulb is kept constantly wet by a siphon reservoir while the other gives a dry temperature reading. Humidity is obtained by comparing the two readings on the enclosed chart. Uses a safe and easy to read red liquid in place of the usual mercury. Dual scales of -10/50°C and …

Relative humidity range is 1 to 99% Resolution is 0.1% RH Accuracy is ±4% RH between 35 to 75%RH, ±5%RH otherwise Humidity features include dew point/wet bulb functions, minimum/maximum memory and high/low alarms Temperature range is -40 to 158°F and -40 to 70°C …

Large 3 3/16” x 2 1/2” dual display Recall min/max temperature and humidity readings Stand or wall mount Monitor can be used in labs, chemical storage areas, clean rooms, stock rooms, factories or outdoors. Unit can be used to monitor desiccators, incubators, refrigerators…