From Hanna Instruments , HI 93640 is a compact, portable and versatile hygrometer to monitor relative humidity anywhere.
The built-in thin-film capacitance sensor assures accurate humidity measurements from 5 to 95% RH with a resolution of 0.1%. The rubber keypad protects the keyboard from dust and accidental splashes. A sintered cap can be placed on the sensor shaft for protection in dusty environments. If faster response is desired, the cap can be removed. Designed to be operated with just one hand, the compact housing fits easily into your palm. This simple-to-use meter is ideal for the HVAC field. For better instrument protection, use the shockproof rubber boot.
HI 93640 is supplied complete with probe sintered cap, battery and instructions.