220-504-A Relative Humidity Sensor
220-HMP50UA Relative Humidity Sensor
225-500 Series Relative Humidity and Temperature Sensors
225-HMP50YA Relative Humidity and Temperature Sensor
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| 225-HMP50YA RH/Temp Sensor & 225-500-A RH/Temp Sensor |
The 220-504-A Relative Humidity Sensor utilizes a capacitor consisting of a metallic grid deposited on a polymer-coated glass plate, the hygroscopic polymer film serves as the dielectric. The dielectric constant of the polymer material increases with the amount of water absorbed; therefore, the capacitance of the sensor depends on the relative humidity. An electronic circuit in the sensor body converts the capacitance to a voltage output which is linearly proportional to the ambient relative humidity. Calibration adjustment potentiometers are provided.
The 225-500-A Relative Humidity & Temperature Sensor has the addition of an integrated circuit transducer that provides a linear microamp current output proportional to temperature. The 225-501-A utilizes a one-element thermistor and the 225-503 uses an active temperature circuit with a linear 0-1 Vdc output. Contact NovaLynx for other temperature sensor options.
The 220-HMP50UA Relative Humidity Sensor features the laser trimmed INTERCAP® capacitive for accurate relative humidity measurements. The chip is user replaceable and requires no calibration. A membrane filter protects the sensor from dirt and dust. The 225-HMP50YA Relative Humidity and Temperature Sensor also measures temperature. The sensor should be mounted in a solar radiation shield when placed outdoors.
Specifications
220-504-A Relative Humidity Sensor
Sensing element: Thin film capacitor, with membrane filter
Measuring range: 0-100% RH
Output: 0-1Vdc with high and low calibration adjustments
Accuracy: ± 2% (0-90% RH) ± 3% (90-100% RH)
Response time: 15 seconds with membrane filter
Operating temperature: -40° to +140°F (-40° to 60°C)
Excitation voltage: 7-35 Vdc
Power consumption: < 4 mA
Size: 0.75" Dia x 9.45" L
Weight/shipping: 10 oz/1 lb
225-500-A Relative Humidity & Temperature Sensor
Humidity: See 220-504-A (above)
Temperature: See 210-201
225-501-A Relative Humidity & Temperature Sensor
Humidity: See 220-504-A (above)
Temperature: See 110-WS-16 Temperature
225-503 Relative Humidity & Temperature Sensor
Humidity: See 220-504-A (above)
Temperature: See 225-HMP50 Temperature (below)
HMP50 Series
Humidity measurement range: 10 to 90% (for which accuracy is specified)
Humidity accuracy: Better than ± 3% @ +68°F (+20°C)
Humidity operating range: 0-100% RH
Stability: ± 2% RH over 2 years
Temperature measurement range: -40° to +140°F (-40° to +60°C)
Temperature accuracy: 1.1°F (± 0.6°) @ +68°F (+20°C)
Input power: 7-28 Vdc
Current consumption: 2 mA typical
Output signal: 0 to 1 Vdc equals 0-100% RH and -40° to 60°C (10 mV equals 1% RH or °C)
Housing material: Chrome-coated aluminum (IP 65)
Size: 0.47" Dia (12 mm) x 3" L (80 mm), threaded M12 x 1
Cable length: 12" (313 mm) with molded connector
Cable connector: Screw-on 4-pin M8 molded 1.5" L (37 mm)
Manuals
220-504-A Relative Humidity Sensor (PDF 1.9MB)
225-500-A Relative Humidity & Temperature Sensor (PDF 2.2MB)
225-501-A Relative Humidity & Temperature Sensor (PDF 2.0MB)
225-503 Relative Humidity & Temperature Sensor (PDF 2.0MB)
225-HMP50YA Relative Humidity & Temperature Sensor (PDF 273KB)
Ordering Information
220-504-A Relative Humidity Sensor, 11' cable
225-500-A Relative Humidity & Temperature Sensor, 11' cable
225-501-A Relative Humidity & Temperature Sensor, 11' cable
225-503 Relative Humidity & Temperature Sensor, 11' cable
220-180 Replacement Humidity Sensing Element
220-2787HM Replacement Membrane Filter, other filters available on special order
330-0524 Sensor Cable, 5 conductor 24AWG shielded
220-HMP50UA Relative Humidity Sensor, with 4-pin connector
225-HMP50 Relative Humidity & Temperature Sensor, with 4-pin connector
220-15778 Replacement Humidity Chip, INTERCAP®
220-17039 Replacement Membrane Filter
330-0324 Sensor Cable for 220-HMP50UA, 3 conductor 24 AWG
330-0524 Sensor Cable for 225-HMP50YA, 5 conductor 24 AWG
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Temperature & Humidity Sensors
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