61Differential Pressure TransmittersPRESSUREDWYER INSTRUMENTS, INC. | dwyer-inst.comCOMPACT DIFFERENTIAL PRESSURE TRANSMITTERSRanges from 0.1 to 100 in w.c., Overpressure Protection to 15 psig, ±0.8% AccuracyOur low cost Series 668B/D Compact 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 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.FEATURES/BENEFITS• 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 connectionsAPPLICATIONS• HVAC and VAV control• Clean rooms and isolation rooms• Duct static pressure measurementSPECIFICATIONSService: 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).3-15/32 [88.00]3-5/32 [80.00]1-57/64[48.20]2X 3/16[ø4.80]1-13/32[35.60]1-45/64[43.25]1-3/16[30.20]1-45/64[43.25]3-15/32 [88.00]3-5/32 [80.00]1-9/32[32.60]2X 3/16[ø4.80]1-57/64[48.20]1-7/32[30.80]3-21/32[92.94]668B668D668B668DA-TC shown attachedSERIES 668B/D®USA: California Proposition 65WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.govMODEL CHARTExample668B-08-1668B-08-1Series668Compact differential pressure transmitterConnectionBDFrontBottomUnidirectional PressureRanges01210222030405060708091012131415161718190 to 0.1 in w.c.0 to 0.2 in w.c.0 to 0.25 in w.c.0 to 0.4 in w.c.0 to 0.5 in w.c.0 to 1 in w.c.0 to 2.5 in w.c.0 to 5 in w.c.0 to 10 in w.c.0 to 25 in w.c.0 to 50 in w.c. 0 to 100 in w.c.0 to ±0.1 in w.c.0 to ±0.25 in w.c.0 to ±0.5 in w.c.0 to ±1 in w.c.0 to ±2.5 in w.c.0 to ±5 in w.c.0 to ±10 in w.c.0 to ±25 in w.c.Output1234 to 20 mA0 to 10 VDC0 to 5 VDCACCESSORIESModelDescriptionA-TCReplacement protective terminal coverOPTIONSUse order code:DescriptionNISTCAL-PT1NIST traceable calibration certificateNext >