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Series 677B Differential Pressure Transmitter
Brand: Dwyer Instruments, LLCSeries 677B Differential Pressure Transmitters are designed to measure pressures as low as 0.1 in w.c. with ±0.4% accuracy.
Use Series 677B for building energy management systems, environmental pollution control, oven pressurization, lab and fume hood control, HVAC and VAV applications.
The transmitter features 15 psid overpressure, reverse polarity protection and EMI/RFI protection. Internal regulation permits use with unregulated DC power supplies.
The NEMA 4 housing allows for versatile mounting locations and integral mounting tabs simplify installation.
Features- NEMA 4 housing enables a range of use outdoor or indoor where water is present
- High accuracy at low pressure ranges provides exceptional measurement for insuring tight-control and minimizing costly out of specification conditions
- Use with unregulated DC power permits easy access to electrical supply reducing costly power conditioning and wiring
Specifications
Brand
Accuracy
- ± 0.4 % of Full Scale at Room Temperature
Approvals & Certifications
- CE
Compensated Temperature
- -18° to 85° C (0° to 185° F)
Enclosure, Body Material
- 302 Stainless Steel
Environmental Protection
- IP65
- NEMA 4
Loop Resistance
- 0 to 800 ohms
Media
- Air
- Non-Conductive & Non-Corrosive Gases
NACE & NIST
- NIST Traceable Calibration Certificate
Operating Temperature
- -18° to 85° C (0° to 185° F)
Output
- 4-20 mA DC, 2-Wire
Power Requirement
- 16-32 Vdc
Pressure Range
- Inches WC: 0 to 25
Pressure Type
- Differential
Process Connection Material
- 3/16” I.D. Rubber
- Brass
Response Time
- Approximately 10 milliseconds
Span & Zero Adjustments
- Internally Accessible Potentiometers
- Non-Interactive
Stability
- ± 1 % of Full Scale Per Year
Storage Temperature
- -54° to 105° C (-65° to 220° F)
Temperature Effect
- < 0.028 % of Full Scale/°F at -18° to 85° C (0° to 185° F)
Tube Connection
- 3/16” O.D. Barbed Brass Pressure Fitting
Wetted Materials
- Brass
- Glass
- Nickel
- Silicone Rubber
- Building energy management
- Environmental pollution control
- Lab and fume hood control
- Variable air volume