Pneumatic Humidity Controllers

Digital Temperature/Humidity Indicator

at a size and price that fits your pocket.

The RHP002, an innovative combination Humidity and Temperature Indicator, is solid-state and uses advanced micro-chip technology. This advanced technology provides for high reliability, precision accuracy and memory storage of min./max. temperature and humidity readings.

Simple to operate, the dependable RHP002 Pen is truly the RH measurement instrument for today’s modern HVAC engineer, mechanic, or technician.


  • Solid state
  • LCD Display reads temperature & humidity at same time
  • Pushbutton C° or F° selection
  • Pocket-sized with carrying case
  • Min./Max. memory storage on temperature & humidity


  • Heating, Ventilating & Air Conditioning (HVAC)
  • Paper & other moisture sensitive storage
  • Environmental control
  • Computer Environments
  • Semiconductor assembly/test areas

Temp Range 32-122°F
Temp Accuracy +2°F
R/H Range 2% to 98% RH
R/H Accuracy ±5% RH
Resolution 0.1°F

Pneumatic Humidity Controls

Proper humidity control is essential for commercial comfort and process control. These are the most popular models of the 3 major brands. For other brands or functions please call sales with your application.

Part # Brand Range Action Mount  
H-3610-1001 Johnson 10-95% Reverse Duct Call... Add to Order
H-4100-201 Johnson 10-95% Direct Wall Call... Add to Order
H-4100-203 Johnson 10-95% Reverse Wall Call... Add to Order