Series 677B Differential Pressure Transmitter

NEMA 4 Enclosure with Integral Mounting Bracket

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.

Calibration Option available under Accessories.

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Product Applications

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

Starting at $385.00

Ordering

Grouped product items
Model	Description	Availability*	Price
677B-15	Differential pressure transmitter, range -1-0-1" w.c.	1-3 days*	$385.00
677B-14	Differential pressure transmitter, range -0.5-0-0.5" w.c.	5-6 Weeks*	$385.00
677B-13	Differential pressure transmitter, range -.25-0-.25" w.c.	1-3 days*	$385.00
677B-12	Differential pressure transmitter, range -0.1-0-0.1" w.c.	3-4 Weeks*	$385.00
677B-08	Differential pressure transmitter, range 0-25" w.c.	1-3 days*	$385.00
677B-07	Differential pressure transmitter, range 0-10" w.c.	1-3 days*	$385.00
677B-06	Differential pressure transmitter, range 0-5" w.c.	1-3 days*	$385.00
677B-05	Differential pressure transmitter, range 0-2.5" w.c.	1-3 days*	$385.00
677B-04	Differential pressure transmitter, range 0-1" w.c.	1-3 days*	$385.00
677B-03	Differential pressure transmitter, range 0-.5" w.c.	1-3 days*	$385.00
677B-02	Differential pressure transmitter, range 0-.25" w.c.	1-3 days*	$385.00
677B-01	Differential pressure transmitter, range 0-.1" w.c.	1-3 days*	$385.00

Specifications

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. *RSS includes non-linearity, hysteresis and non-repeatability.
Stability:: ±1% FS/yr.
Temperature Limits:: > Operating and Compensated: 0 to 185°F (-18 to 85°C);
Storage: -65 to 220°F (-54 to 105°C).
Pressure Limit:: 15 psi (100 kPa).
Thermal Effects:: (Includes zero and span) <0.028% FS/°F, 0 to 185°F (-18 to 85°C).
Power Requirements:: 16 to 32 VDC.
Output:: 4 to 20 mA DC, 2-wire.
Zero and Span Adjustments:: Internally accessible potentiometers, noninteractive.
Response Time:: Approximately 10 ms.
Max. Loop Resistance:: DC: 0 to 800 Ohms.
Process Connection:: 3/16" OD barbed brass pressure fitting.
Enclosure Rating:: NEMA 4 (IP65).
Weight:: 11.5 oz (330 g).
Agency Approval:: CE.

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

Support Library

Manuals

Instruction Manual

Catalog Pages

Series 677B Catalog Page

Approvals

CE Approval

Drawings

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Accessories

Model	Description	Availability*	Price
A-489	4" 303 SS straight static pressure tip with flange, 1/4" hose barb.	1-3 days*	$9.50
A-302F-A	303 SS Static pressure tip with mounting flange, for 3/16" I.D. rubber or plastic tubing. 4" insertion depth, includes mounting screws	1-3 days*	$12.40