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KOBOLD Humidity Measuring Instrument with Analogue Output
Price
$261.00
CAD
Stock
25+ In Stock
The KOBOLD AFA-G humidity sensors are suited for measuring relative humidity in air and in other non-aggressive gases. The sensors are based on capacitive metrology which is reasonably-priced, maintenance-free and highly accurate.
Capacitive humidity sensor elements form the basis of these sensors. An electrode system, a moisture-sensitive polymer layer and a gold layer that is permeable to vapour are situated on a small thin glass or ceramic substrate.
Since the hygroscopic polymer layer can absorb water molecules that alter its dielectric constant, this layered system acts as a moisture-dependant capacitor, whose capacitance is a measure of the surrounding relative humidity.
The change in capacitance is converted to an electrical output signal by electronics normally mounted on the humidity sensor element. Both parts form a capacitive humidity sensor that can be adjusted using humidity references. Accuracy is approximately ±2%.
Besides providing the output signal of 4 to 20 mA, the measuring instrument allows the measured value to be read off a red LED display at the measuring point. The display is supplied from the 4 to 20 mA signal current and thus requires no additional power supply.
The measuring instruments are also available with a programmable switching output. Sensors from the range are delivered with an Aluminum sensor unit and a gauze filter. The connection is made with a right-angle plug according to DIN 43650.
Specifications
Brand
Accuracy
- ± 2 % Relative Humidity (For Range 5 to 95 % Relative Humidity & 10° to 40° C)
Ambient Temperature Range
- -40° to 80° C (-40° to 176° F)
Applications
- Bakery Technology
- Greenhouses
- Monitoring & Control of Air Conditioning Systems, Drying Plant, Humidifiers & Dehumidifiers
- Research & Development
- Ripening Warehouses for Food
Display
- Red LED Display
Electrical Connectors
- DIN 43650
Environmental Protection
- IP30
- IP65
Humidity
- 0 to 100 % Relative Humidity - Measuring Range
Measuring Error
- < 0.1 %/K
Mounting
- Duct Mount
Output
- 4-20 mA - Analog Output
Output Load
- 650 ohms at 24 Vdc - Max.
Power Requirement
- 12-30 Vdc
Response Time
- < 20 seconds
Sensor / Probe Material
- Aluminum
Storage Temperature
- -40° to 80° C (-40° to 176° F)
Switch Type
- Transistor - Limit Contact Optional (Open Collector)
- Monitoring & Control of Air Conditioning Systems, Drying Plant, Humidifiers & Dehumidifiers
- Bakery Technology
- Warehousing
- Ripening Warehouses for Food
- Research & Development
- Greenhouses
