Munro Instruments Ltd

- Model SX2437 - Professional Hygrometer



This compact, rugged hygrometer provides accurate measurements of relative humidity, air temperature, vapour pressure and barometric pressure. It is supplied with a radiation shield to protect it from dust and liquid, whilst ensuring adequate airflow to the sensor. For indoor monitoring applications, use of the radiation shield is not critical, providing the sensor is not exposed to solar radiation or other direct sources of heat. The instrument comprises both a capacitance humidity sensor and a bandgap temperature sensor. Measurements are taken simultaneously and are used to calculate the vapour pressure. Barometric pressure is measured using a secondary sensor chip. The hygrometer responds quickly to changes in the temperature and humidity and has very minimal long-term drift. It is recommended that the sensors are calibrated at least once every two years to ensure continued accuracy.

Humidity Range: 0-100% RH
Humidity Resolution: 0.1% RH
Temperature Range: -40°C to +80°C
Vapour Pressure Range: 0-47 kPa
Vapour Pressure Resolution: 0.01 kPa
Sensor Types: Digital Capacitance and Thermistor
Output: SDI-12
Operating Environment: -40°C to +80°C
Cable Length: 5 m
Power Requirements: 3.6-15 VDC, 4 mA during 300 ms measurement
Long Term Drift: 0.04°C per year

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