Description

Dwyer Instruments 604A-3 Differential Pressure Transmitter, 0-50 (0-127 cm) Ranges in Inches of Water as stoked, 0-15 (0-381 mm) Inches Max Range and 0-120 (0-305 cm) Inches Min. Range. Simple Type: Pressure Transmitter The Dwyer Series 604A Differential Pressure Transmitter converts air or compatible gas pressure into a standard 4-20 mA output signal for pressure ranges from 0-0.4” up to 0-120? w.c. (0-2.54 mm up to 0-304.9 mm w.c.). Each of these models overlap in range so that any range within these limits can be achieved by adjustment of the span and zero controls. Versatile circuit design enables use in 2, 3 or 4-wire current loops. Positive, negative or differential pressures can be measured within an accuracy of ±2% of span. The Series 604A uses an isolated piezoresistive pressure sensor to produce a resistance change across a wheatstone bridge. The signal is conditioned and converted into a 4-20 mA output signal. For applications requiring direct pressure or percent of full span readings, the optional A-701 digital readout makes an ideal companion device. It provides a bright .6? (15.3 mm) high, 3-1/2 digit, LED display while also supplying power to the Series 604A Transmitter. Download the datasheet (PDF)