CRH-5_RH_Transmitter

CRH-5 Relative Humidity Transmitter series

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CRH-5 RH & Temperature Transmitter

The CRH-5 relative humidity transmitter series employs an economical capacitive polymer sensor which performs well over a broad temperature range. It is ideally suited for high-volume applications which require low-cost monitoring while offering excellent performance.

Sensing Element

Porous, thin gold electrodes are deposited over a humidity sensing polymer allowing for rapid diffusion of the sensed water vapor. This permits the water to enter and leave easily providing for good response to changes in humidity.

Features

	±5% Accuracy
	20 to 90% Relative Humidity
	0 to 140º F Temperature (Optional)
	Two-Wire Loop Powered Transmitter
	Low-Cost Design
	Innovative Packaging for Improved Performance
	Quick Connects for Power and Signal Output
	Three Wire Screw Terminals
	Reverse Polarity Protected

Applications

	HVAC/Building Controls
	Energy Management Systems (EMS)
	Enthalpy Control
	Indoor Air Quality (IAQ)
	Clean Rooms
	Museums/Archives
	Hospitals/Labs
	Refrigeration Control
	Pharmaceutical
	Swimming Pools
	Animal Rooms

SPECIFICATIONS

Sensing Element: Organic Polymer RH Capacitive sensor
Optional: Thermistor temperature (10 k ohms)

PERFORMANCE
Accuracy: ± 5% RH. at 25ºC(77ºF)
Drift rate: Less than 1% drift per year typical
Hysteresis: Less than 1% RH
Air Velocity Across Transmitter:
Maximum: 10,000 fpm
Minimum: 150 fpm
Signal Outputs: 4 to 20mA, 0 to 5 volts, 0 to 10 volts, (0 to 100% RH linear).

OPERATING RANGE:
Humidity: 0 to 99% operating
Temperature: 0 to 140ºF.

POWER SUPPLY:
Supply voltage: 10 to 28 VDC (Current).
Supply voltage: 15 to 28 VDC (Voltage).
Maximum load (Current Output Only): ohm = Supply –10VDC/.02 Amps
Storage temperature: -40ºF to+158ºF.
　

Ordering Information

CRH-5-201-HW: 20 to 4 mA output
CRH-5-41-HW: 4 to 20 mA output
CRH-5-5V-HW: 0 to 5 V output
CRH-5-10V-HW: 0 to 10 V output