The DE44 is a dual-sensor multifunction pressure instrument that combines a digital readout, dual limit detection relays and optional transmitter output. It can measure positive gauge, negative gauge or differential pressure of two independent gas / air pressure sources. It is ideally suited for applications such as: ventilation and air handling systems, climate control systems, environmental systems. The instrument is based on dual piezoresistive sensor elements. The pressure is measured directly by a piezo-resistive resistance bridge that is formed on the surface of an integral silicon diaphragm in each sensor. Change of pressure results in change of resistance that is converted to a varying voltage and then digitized. The instrument's internal microcontroller transfers the measured value on the LED display, controls the two limit detection relays / switches and transmits the measured value through an analog conversion stage as a voltage or current signal output. An optional output signal can be slew rate limited, spreaded, inverted and transformed non-linearly by means of atable function.
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