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Category: Air Temperature and Humidity Sensors

The Comptus A70-­H relative humidity sensor provides an analog output signal proportional to relative humidity. The A70­‐LPDD loop indicator can be used to display the senses relative humidity with the 4-­‐20 mA output. These units are used in conjunction with electronic data collection systems or for input to control systems. They are readily combined with meter relays to provide custom controls.

Systems are available with outputs of 0-1 V or 4-­20 mA. The A70‐H is powered from 6 ­‐ 30 VDC.

Relative humidity is sensed by a thin­‐film polymer capacitor sensor with excellent durability in harsh environments. The relative humidity sensor is protected by a hydrophilic membrane under a wire mesh screen.

Each Comptus relative humidity sensor is provided with a detailed instruction manual. Comptus relative humidity sensors and transmitters are manufactured in the USA.

Model A70-HL Relative Humidity

Accuracy: +/-2% R.H.
Use: General Monitoring 
Durability Rating: Class 5

The A70-HL provides an analog output signal proportional to relative humidity.  The A70-LPDD loop indicator can be used to display the sensed relative humidity with the 4-20 mA output. These units are used in conjunction with electronic data collection systems or for input to control systems. They are readily combined with meter relays to provide custom controls. 

Systems are available with outputs of 0-1 V or 4-20 mA. the unit is powered from 6 - 30 VDC.

Relative humidity is sensed by a thin-film polymer capacitor sensor with excellent durability in harsh environments.  The relative humidity sensor is protected by a hydrophilic membrane under a wire mesh screen.

Each system is provided with a detailed instruction manual.

TECHNICAL SPECIFICATION:

Range: 3 to 95% R.H.
Sensor: Thin film polymer capacitor
Accuracy: +/- 2% R.H.
Output:

A70-HL: 4-20 mA

A70-HV: 0-1 VDC

Enclosure: ABS Plastic, NEMA 4X
Size: 2" L X 3" W X 1.5" D  
Weight :  8 ounces
Operating Temperature : -20 / 75 ° C 
Connectors :

Barrier strips to accept AWG 14 - 22 wire

Liquid tight wire gland for 0.09 to 0.265: diameter cable  

Accessories :  A96 Lightning protectors    
A70-LPDD Digital Display