Humidity Sensors and Transmitters

 

 

Wall and Duct mounted sensors provide an output for Humidity and/or Temperature.  4 20 mA outputs provide and easy interface to Data Loggers, PLCs and Alarm Systems.   Accuracies of 1% - 5% are available.  Temperature may be added to these transmitters for ease of use.

The Relative Humidity Transmitters convert a resistance change to a linear 4 to 20 mA output. Accuracy is maintained over the entire operating range using a thermistor for temperature compensation. This series is offered in accuracies of 5%, 3%, 2% and 1% and in mounting configurations of room, duct, outside, and wall plate.

Advanced Ceramic Technology design overcomes the limitations of other resistance-based humidity sensors that utilize water-soluble polymer coatings. The Advanced Ceramic Technology enables these sensors to recover fully from condensation. This also allows the sensor to maintain its accuracy over a longer period of time. 

Configurations range from room sensors to rugged outdoor sensors.  All come with a 5 year warranty.  An optional temperature transmitter provides a convenient single sensor design, with 2 each 4 - 20 mA outputs.  Each transmitter may be specified for the desired range.  The minimum span is 20% RH and 20C (36F).  Each humidity transmitter is calibrated using a NIST Traceable Temperature and Humidity Chamber.


Room Sensor

 

Duct Sensor

Outside

Wall Plate

 

 

 Specifications:

RH Output

 

4 to 20mA (250 Ohm Load): 15 to 40 VDC / 18 to 28 VAC

4 to 20mA (500 Ohm Load): 18 to 40 VDC / 18 to 28 VAC

0-5 VDC: 12 to 40 VDC / 18 to 28 VAC (4K Load Min.)

0-10 VDC: 18 to 40 VDC / 18 to 28 VAC (4K Load Min.)

Long Term Stability

0.5% RH 

Supply Voltage 

2-wire, 4 to 20mA (Factory Standard)

3-wire, 0-5, 0-10 VDC or 4 to 20mA

Operating Temperature Range

Duct / Outside: -10 to 122oF Room: 32 to 122oF

Response Time

110 seconds for 63% Step

Repeatability

Less than 2% drift / 5 years

Accuracy @ 77oF (25oC)

+/- 1% over 20% span (between 20 to 90%)

+/- 2%, 3%, or 5% from 20 to 95%

Sensitivity

0.1 % RH

Operating Humidity Range

0 to 95 % RH non-condensing

Hysteresis

Less than 0.4% RH

Saturation Response Time

10 minutes for 63% Step

Temperature Transmitter Accuracy (if Included)

+/- 1% of Calibrated span (Standard)

 

 

Approximate Cost:

RH Accuracy

Room

Duct

Outdoor

Wall Plate

Add Temperature (4 20)

5%

$ 187

$ 192

$ 192

$ 192

+ $ 100

3%

$ 270

$ 280

$ 290

$ 290

+ $ 100

2%

$ 350

$ 360

$ 360

$ 360

+ $ 100

1%

$ 550

$ 560

$ 560

$ 560

Contact A.I.S.

Data Sheet            RH Applications Note            Basics of RH


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RH, Humidity, RH Sensor, Humidity Sensor, Temperature Humidity Sensor, RH Probe, Humidity Probe

 
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Note:  Prices shown are for reference only, and may change without notice.  Contact Advanced Industrial Systems, Inc. for firm price quotations.

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Last modified: Wednesday October 23, 2013.