677B Differential Pressure Transmitter

Designed to measure pressures as low as 0.1 in w.c. with 0.4% accuracy, features 15 psid overpressure

Starting At
$460.00 CAD
Normally ships in 3-4 Weeks

Configure   Request Quote

Can We Help You?


Our product experts are here to help you find the right solution for your application!

Series 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.

• 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

Service Air and non-conductive, non-corrosive gases
Wetted Materials 302 SS, glass, nickel, silicone rubber and brass
Accuracy 0.4% FS* at room temperature.
Stability 1% FS/yr
Temperature Limits Operating and Compensated: 0F - 185F (-18C - 85C);
Storage: -65F - 220F (-54C - 105C)
Pressure Limit 15 PSI (100 kPa)
Thermal Effects Includes zero and span) < 0.028% FS/F, 0F - 185F (-18C - 85C)
Power Requirements 16 VDC - 32 VDC
Output 4 - 20 mA DC, 2-wire
Zero and Span Adjustments Internally accessible potentiometers, noninteractive
Response Time Approximately 10 ms
Max. Loop Resistance DC: 0 Ω - 800 Ω
Process Connection 3/16 in OD barbed brass pressure fitting
Enclosure Rating NEMA 4 (IP65)
Weight 11.5 oz (330 g)
Agency Approval CE
*RSS includes non-linearity, hysteresis and non-repeatability

• Building energy management
• Environmental pollution control
• Lab and fume hood control
• Variable air volume