Series 674

Measure and Control building/room pressure, air flow, duct pressure or filter drop with the Series 674 Differential Pressure Transmitter. Thses versatile transmitters provide up to six field selectable direct or compound pressure ranges. Additional features include 10 psid overpressure without zero shift, non-interactive zero and span adjustment, temperature compensation, short circuit and reverse polarity protection.

PHYSICAL DATA

GENERAL

     Service: Clean dry air or any inert gas.

     Accuracy: ± 1% FS (includes non-linearity, hysteresis and non-repeatability).

     Overpressure: 10 psid (0.7 kg/cm²).

     Output: 4-20mA, 2-wire.

     Supply Voltage: 12-40 VDC.

     Loop Resistance: 1600 Ohms @ 40VDC.

     Zero and Span Adjustment: ±15%, non-interactive.

     Stability: Less than 1% FS/year.

     Operating Temperature Range: 0 to 175°F (-18 to 80°C), 10 to 90% RH, non-condensing.

     Compensated Temperature Range: 25 to 150°F (-4 to 65°C).

     Thermal Errors: ±0/0125%/F (0.02%/C).

     Response Time: 60 msec.

     Pressure Connections: Barbed for 1/4" O.D. 5/32" I.D. tubing.

     Wetted Parts: Brass hose barbs, silicone.

     Enclosure: Models 674-4XX: Cold-Rolled Steel, NEMA-4 (IP56); Models 674-1XX: Panel Mount.

     Weight: Models 674-4XX: 1.0 lbs (.45 kg); Models 674-1XX: 0.5 lbs.

STOCKED MODELS

Model Number	Enclosure	Ranges (inches of w.c.)
674-414	NEMA 4 (IP56)	0 TO 0.1, ± 0.5
674-114	Panel mount
674-424	NEMA 4 (IP56)	0 TO 1.0, 0 TO 0.5, 0 TO 0.25, ± O.5,± 0.25, ± 0.125
674-124	Panel mount
674-434	NEMA 4 (IP56)	0 to 5.0, 0 to 2.5, 0 to 1.25, ±2.5, ± 1.25, ± 0.625
674-134	Panel mount
674-444	NEMA 4 (IP56)	0 to 30, 0 to 15, 0 to 7.5, ±15.0, ±7.5, ±3.75
674-144	Panel mount