Description

604D Series Indicating Pressure Transmitters Simple Type: Pressure Transmitter 604D Indicating Transmitter simultaneously provides local indication on a compact, easy to read analog scale while also converting that pressure into a standard 2, 3 or 4 wire, 4-20 mA signal for ranges as low as 0-0.5 in. w.c. Positive, negative or differential pressures can be measured within ±5% of full scale (gage reading) or ±2% of full span output (transmitter signal). The basic mechanical components of the Series 604D units are similar to those used in the popular, time-proven Minihelic® differential pressure gage. However, the Series 604D models add electrical conditioning and amplification of a resistance change produced by an isolated piezoresistive pressure sensor. This resistance change is the result of a slight flexing which results from spring deflection as pressure is applied to the diaphragm which is mechanically linked to the spring. Download the datasheet (PDF)