RH-1A rH Sensor

Description: The RH-1A Relative Humidity probe is an inexpensive, wide input range, low-power humidity sensor. The RH-1A contains a rugged capacitive humidity sensing element that can output RH from 0 to 98%. The RH-1A is of cylindrical shape with a 1' cable to connector fitted to one end. The sensing element is field replaceable and is protected from dirt and grit by an integral membrane filter. See the Data Logger Selection Guide for help with locating the appropriate instrument for your inputs.

Data logger Interface:

The RH-1A provides a linear 0 to 5Vdc output corresponding to 0 to 100% relative humidity. This sensed signal can be directly connected to one of the ModuLogger "Mini" analog inputs, one of the ModuLogger System Base or MLIM-1 Interface Modules and/or the HyperLogger™ HLIM-1 Interface Modules input channels. Scaling and other desired data manipulation is readily handled in the programming of the logger using the powerful HyperWare software.

The unit can be powered from a DC source in the range of 7 to 28Vdc and stabilizes in 150mS. Due to its quick stabilization after power-up, the unit can be powered on just prior to taking a reading, sampled, then powered off to conserve logger battery energy. The unit can be powered directly by the ModuLogger, Mini, or HyperLogger™ system batteries (optionally switched through a logger output relay) or from a PSM-2 Power Supply Module in conjunction with any of the Logic Beach data logging systems.

Specifications:

Operating Temperature:	-10 to 60°C
Accuracy:	+/-3% over 0 to 90%RH, +/- 5% 90-98%RH
Measurement Range:	0 to 98%RH
Stability:	better than +/-2% over 2 years
Excitation Voltage:	7 to 28 Vdc
Current Consumption:	2 mA
Output Signal:	0 to 5 Vdc corresponding to 0 to 100%
Probe Dimensions:	0.47" dia, 2.7 " long
Termination:	M8 connector to 1' cable