Dwyer Omega – Series 626 & 628 Accurate Industrial Pressure Transmitters, 0.25% & 1% Accuracy, NEMA 4X
Product Code: Series 626 & 628
Manufacturer: Dwyer Omega
The Series 626 & 628 Pressure Transmitters provide accurate and dependable pressure measurement for a wide range of industrial applications. Designed for both pneumatic and hydraulic systems, these transmitters convert pressure into a stable electrical signal, supporting efficient control and monitoring without requiring extensive recalibration.
Engineered for demanding environments, the transmitters feature a rugged, weatherproof NEMA 4X (IP66) housing that protects against dust, moisture, and corrosion. The Series 626 offers high-accuracy performance at ±0.25% full scale, while the Series 628 provides a cost-effective solution with ±1.0% full scale accuracy. Both models support a wide selection of pressure ranges and electrical outputs to meet varied system requirements.
Ideal for process control, HVAC, hydraulics, and OEM equipment, these transmitters are trusted for their long-term reliability, ease of integration, and durable construction. Whether monitoring pressure in critical infrastructure or general industrial systems, the 626 & 628 series delivers consistent, precise results.
Accuracy Detail
626: 0.25% FS; 626: 0.20% RSS; 628: 1.0% FS; 628: 0.5% RSS; 626 Absolute Ranges: 0.5% FS; 626 absolute ranges: 0.30% RSS. (Includes linearity, hysteresis, and repeatability.)
Burst Pressure
500 psi Maximum
Compensated Temperature, Max
175 °F
Compensated Temperature, Min
0 °F
Compliance
CE
Compliance Note
CE, Optional: NSF/ANSI 61/372, ANSI/UL 218, ANSI/UL 508, NEPA 20
Enclosure Ratings
IP66, NEMA Type 4X
Loop Resistance
0 to 1000 Ω max
Materials, Wetted
316L Stainless Steel
Media Compatibility
Alcohols, Argon, Compatible Gases, Compatible Liquids, Nitrogen, Oils, Water
Mounting Orientation
Not Position Sensitive
Operating Temperature, Max
200 °F
Operating Temperature, Min
0 °F
Output Detail
4 to 20 mA
Power Consumption
38 mA
Measurement Pressure, Min
0 psi
Measurement Pressure Type
Gauge
Process Connection Size
1/4 in
Process Connection Type
NPT Male
Proof Pressure
Up to 200 psi
Response Time
300 ms
Supply Power Note
10 to 30 VDC (for 4 to 20 mA, 0 to 5, 1 to 5, 1 to 6 VDC outputs); 13 to 30 VDC (for 0 to 10, 2 to 10 VDC outputs); 5 VDC ± 0.5 VDC (for 0.5 to 4.5 VDC ratio to metric output), 10 to 35 VDC (for 4 to 20 mA with to CB option); 13 to 35 VDC or isolated 16 to 33 VAC (for selectable output with to CB option)
Supply Power Type
DC
Supply Voltage
10 to 35 Vdc
Thermal Effects
± 0.02% FS/°F (includes zero and span)
Weight
283 g
- NEMA 4X rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists
- Robust 316L SS oil filled sensor provides shock and vibration resistance insuring stability in controlling pressure for process applications
- A wide range of models and connections that can meet pressure measurement specifications from low to very high
