- Rotating cap to protect sensor
- LCD digital display
- Temperature and humidity in °F or °C
- Max/Min record function
- Data Hold to capture readings
- Auto-off function
The Mastercool 52230 is a Pen Type Hygrometer with an Electronic Capacitance Polymer Film sensor. It's small footprint is only 6.8" long, and has a Temp Range of -4 to 140° F. The 1 CR2032 Lithium Coin Cell Battery has a 100 hour lifespan.