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Air Pressure Sensor 2810A/2810A EX

Air Pressure Sensor 2810A/2810A EX
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AIR PRESSURE SENSOR 2810A/2810A EX A barometric pressure sensor produced for use in hot climates and desined for Aanderaa Automatic Weather Stations and Display Units. The monolithic technology used in modern electronic devices may also be used for making small pressure sensors. Sensors made using this method have very small hysteresis and a very low rate of ageing. To eliminate error due to ambient temperature changes the small sensing element can be heated to a specific temperature before the measurement is taken. Air Pressure Sensor 2810 utilizes a 4x4mm small silicon chip as a sensing element. In the central area of this chip is a thin membrane that is exposed to atmospheric pressure on one side and to a vacuum on the other. The membrane is furnished with 4 diffused resistors that form a Wheatstone bridge. The output signal is proportional to the atmospheric pressure. The chip thus acts as an absolute pressure-sensing device. A temperature sensing resistor and 4 heating resistors are also diffused onto the chip. In conjunction with an external control circuit, these resistors allow the chip to be held at a constant temperature of 60°C during the measurement. The sensor consists of a PC-board with components fastened to the sensor base and protected by a cylindrical cover. The cover is screwed onto the base and sealed with an O-ring. Six holes in the base provide atmospheric pressure to the sensing element inside the sensor. The sensor shows outstanding performance as it has practically no hysteresis, no temperature drift and no ageing. It is also insensitive to mechanical acceleration and can be operated in any position. The sensor is waterproof. Before measurement the sensor is heated to 60°C and to allow enough time for temperature stabilization the sensor should be connected to one of the last channels in the measuring system. Current consumption for silicon chip heating varies with ambient temperature. At 60°C the heating current is zero. This increases linearly as temperature decreases. A maximum of 70 mA for heating is reached at –40°C. The heating current is normally switched off between readings.

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Specifications 2810A/2810A EX Measuring Range: PIN CONFIGURATION Receptacle, exterior view, bushing = ; pin = Bridge ground System ground Signal Bridge voltage The sensor is also available as an -certified sensor; contact factory for prices. CALIBRATION Serial No: Calibration is performed at room temperature. Reference: Paroscientific, Inc Digiquartz Barometer Model no. 760-16B. Datalogger 3660, giving the following raw data readings: Pressure (hPa) Raw data To refer the measured air pressure to sea level add a factor according to the table below (approx.value ): Installation altitude (m)...

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Air Pressure Sensor 2810A/2810A EX 2Pages

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Air Pressure Sensor 2810A/2810A EX
2Pages