The Series 648B Differential Pressure
Transmitter from Dwyer Instruments Inc. is designed to be used with clean, dry
air and other non-corrosive gases. Each unit features a push-activated zero
function and an associated LED light indicator. With the convenient
push-button, zero calibration can be performed without any additional
equipment, which significantly reduces time and cost for users. The dual color
LED indicates if the transmitter is at normal operation, overpressure or in the
process of zero calibration.
The enclosure consists of a flame retardant
plastic top cover and a stainless steel bottom plate for ruggedness. The pressure
ranges vary from 0.1 in w.c. to 25 in w.c. unidirectional and 0.25 in w.c. to 5
in w.c. bidirectional. Wiring time is reduced with the removable terminal
block. Each unit features a 2-wire 4 to 20 mA output that is fully protected
against short circuiting and incorrect wiring.
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