Series 634ES Adjustable Range Pressure Transmitter
0.5% Full Span Accuracy, Ranges to 5000 psi
The Dwyer 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.
Dwyer Series 634ES Specifications
- 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.
Available Models
| MODEL | DESCRIPTION |
|---|---|
| 634ES-0 | range 10 psi (0.69 bar), min. range 10 psi (0.69 bar), max. range 20 psi (1.38 bar). |
| 634ES-1 | range 30 psi (2.07 bar), min. range 20 psi (1.38 bar), max. range 40 psi (2.76 bar). |
| 634ES-2 | range 50 psi (3.45 bar), min. range 40 psi (2.76 bar), max. range 60 psi (4.14 bar). |
| 634ES-3 | range 100 psi (6.9 bar), min. range 60 psi (4.14 bar), max. range 120 psi (8.3 bar). |
| 634ES-4 | range 200 psi (13.8 bar), min. range 100 psi (6.9 bar), max. range 250 psi (17.2 bar). |
| 634ES-5 | range 300 psi (20.7 bar), min. range 250 psi (17.2 bar), max. range 350 psi (24.1 bar). |
| 634ES-6 | range 500 psi (34.5 bar), min. range 350 psi (24.1 bar), max. range 600 psi (41.4 bar). |
| 634ES-7 | range 1000 psi (69 bar), min. range 600 psi (41.4 bar), max. range 1250 psi (86 bar). |
| 634ES-8 | range 2000 psi (138 bar), min. range 1250 psi (86 bar), max. range 2500 psi (172 bar). |
| 634ES-9 | range 4000 psi (276 bar), min. range 2500 psi (172 bar), max. range 6000 psi (414 bar). |