Description

Series 668B/D Compact Differential Pressure Transmitters

Ranges from 0.1 to 100 in w.c., Overpressure Protection to 15 psig, ±0.8% Accuracy

 

Our low cost DWYER Series 668B/D Differential Pressure Transmitters are capable of sensing differential gage pressure with ±0.8% FS accuracy, and converts this pressure difference to a proportional high level analog output for both unidirectional and bi-directional pressure ranges. These DWYER Series 668B/D Differential Pressure Transmitters can withstand up to 15 psig overpressure with no damage to the unit. The compact, lightweight design makes installation simple and easy. Units are protected against incorrect wiring, and include a protective terminal cover.

 

Product Applications

• HVAC and VAV control
• Clean rooms and isolation rooms
• Duct static pressure measurement

 

Features

• Protection from 15 psi overpressure & incorrect wiring
• High accuracy at low pressure ranges
• Two package selections allows easy device mounting to best fit application pressure connections

 

Specifications

• Service: Air and non-conductive gases.
• Accuracy: ±0.8% FS.
• Temperature Limits: Operating: 0 to 170°F (-18 to 77°C); Storage: -40 to 185°F (-40 to 85°C).
• Pressure Limits: 15 psig (1.0 bar).
• Thermal Effects: ±0.03% FS/°F (±0.054% FS/°C).
• Compensated Range: From 40 to 170°F (4.4 to 77°C).
• Power Requirements: 12 to 32 VDC.
• Output Signals: 4 to 20 mA (2-wire), 0 to 10 VDC (3-wire), or 0 to 5 VDC (3-wire).
• Zero Adjustment: Accessible under the small terminal cover.
• Electrical Connection: Terminal strip.
• Process Connection: 3/16″ OD barbed brass for 1/8″ ID push-on tubing.
• Enclosure: Stainless steel and PC+ABS alloy, UL 94 V-0 rated.
• Weight: 4.0 oz (113 g).
• Agency Approvals: CE.

 

Models & Ordering

668B, 4 to 20 mA

Model	Description
668B-01-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 0.1″ w.c.
668B-02-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 0.25″ w.c.
668B-03-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 0.5″ w.c.
668B-04-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 1.0″ w.c.
668B-05-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 2.5″ w.c.
668B-06-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 5″ w.c.
668B-07-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 10″ w.c.
668B-08-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 25″ w.c.
668B-09-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 50″ w.c.
668B-10-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 100″ w.c.
668B-12-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±0.1″ w.c.
668B-13-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±0.25″ w.c.
668B-14-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±0.5″ w.c.
668B-15-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±1″ w.c.
668B-16-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±2.5″ w.c.
668B-17-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±5.0″ w.c.
668B-18-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±10″ w.c.
668B-19-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±25″ w.c.
668B-21-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 0.2″ w.c.
668B-22-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 0.4″ w.c.

 

668B, 0 to 10 VDC

Model	Description
668B-02-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 0.25″ w.c.
668B-03-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 0.5″ w.c.
668B-04-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 1″ w.c.
668B-05-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 2.5″ w.c.
668B-06-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 5″ w.c.
668B-12-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to ±0.1″ w.c.
668B-13-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to ±0.25″ w.c.
668B-21-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 0.2″ w.c.
668B-22-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 0.4″ w.c.

 

668B, 0 to 5 VDC

Model	Description
668B-02-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to 0.25″ w.c.
668B-03-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to 0.5″ w.c.
668B-04-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to 1″ w.c.
668B-05-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to 2.5″ w.c.
668B-12-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to ±0.1″ w.c.
668B-13-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to ±0.25″ w.c.
668B-22-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to 0.4″ w.c.

 

668D, 4 to 20 mA

Model	Description
668D-01-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 0.1″ w.c.
668D-02-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 0.25″ w.c.
668D-03-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 0.5″ w.c.
668D-04-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 1″ w.c.
668D-05-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 2.5″ w.c.
668D-06-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 5″ w.c.
668D-07-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 10″ w.c.
668D-08-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 25″ w.c.
668D-09-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 50″ w.c.
668D-10-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 100″ w.c.
668D-12-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±0.1″ w.c.
668D-13-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±0.25″ w.c.
668D-14-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±0.5″ w.c.
668D-15-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±1″ w.c.
668D-16-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±2.5″ w.c.
668D-17-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±5″ w.c.
668D-18-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±10″ w.c.
668D-19-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to ±25″ w.c.
668D-21-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 0.2″ w.c.
668D-22-1	Compact differential pressure transmitter, 4 to 20 mA, 0 to 0.4″ w.c.

 

668D, 0 to 10 VDC

Model	Description
668D-02-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 0.25″ w.c.
668D-03-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 0.5″ w.c.
668D-04-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 1″ w.c.
668D-05-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 2.5″ w.c.
668D-06-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 5″ w.c.
668D-12-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to ±0.1″ w.c.
668D-22-2	Compact differential pressure transmitter, 0 to 10 VDC, 0 to 0.4″ w.c

 

668D, 0 to 5 VDC

Model	Description
668D-04-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to 1″ w.c.
668D-05-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to 2.5″ w.c.
668D-06-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to 5″ w.c.
668D-12-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to ±0.1″ w.c.
668D-13-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to ±0.25″ w.c.
668D-22-3	Compact differential pressure transmitter, 0 to 5 VDC, 0 to 0.4″ w.c.