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, PLC’s 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 20°C (36°F). 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
RH, Humidity, RH Sensor, Humidity Sensor, Temperature Humidity Sensor, RH Probe, Humidity Probe
