Series 634ES Transmitters sense a single pressure for air, compatible gas or liquid and provide 4-20 mA output signal. Positive pressure can be measured within an accuracy of ±0.5% of span. The Series 634ES uses an isolated piezoresistive pressure sensor to produce a resistance change across a wheatstone bridge. Convenient 2-wire operation simplifies installation. Zero and span adjustments are fully protected inside a rugged die cast aluminum housing with durable gray polyurethane finish. Enclosure is designed to meet NEMA 4X requirements.

Service: Compatible, gases & liquids.

Wetted Materials: Types 316, 316L SS.

Accuracy: ±0.5% F.S.

Stability: ±1% F.S./yr.

Temperature Limits: 20 to 120°F (-6.67 to 48.9°C).

Compensated Temperature Limits: 20 to 120°F (-6.67 to 48.9°C).

Pressure Limit: 1.5x maximum pressure range.

Thermal Effect: ±0.025% F.S./°F (0.045% F.S./°C).

Power Requirements: 10 to 35 VDC (2-wire).

Output Signal: 4 to 20 mA.

Zero and Span Adjustments: Protected potentiometers located in auxiliary housing.

Loop Resistance: 1250 ohms DC max.

Current Consumption: 38 mA DC max.

Electrical Connections: Terminal block.

Process Connection: 1/4" (6.35 mm) female NPT x 1/2" (12.7 mm) male NPT.

Enclosure Rating: Designed to meet NEMA 4X.

Mounting Orientation: Not position sensitive.

Weight: 1 lb 10.6 oz (754 g).

Agency Approvals: CE.