Series 668 Differential Pressure Transmitter

Ranges from 0 to 0.25" w.c., Overpressure Protection to 10 psig, ±1% Accuracy

Our low cost SERIES 668 Differential Pressure Transmitter is capable of measuring low pressures with a ±1% accuracy - ideally suited for proper building pressurization and air flow control. Transmitters can withstand up to 10 psig overpressure with no damage to the unit. Variable capacitance sensor design provides excellent sensitivity and long-term stability. Compact, lightweight design makes installation simple and easy. Units also feature reverse-polarity protection.

Product Applications

  • Variable air volume systems
  • HVAC
  • Building management

Models & Ordering

Filter By

Model Description Usually Ships Price Order
668-1
Ships: Next Day
Price: $164.00
Differential pressure transmitter, range 0-0.25" w.c. Next Day $164.00 Order
668-2
Ships: Next Day
Price: $164.00
Differential pressure transmitter, range 0-0.5" w.c. Next Day $164.00 Order
668-3
Ships: Next Day
Price: $164.00
Differential pressure transmitter, range 0-1.0" w.c. Next Day $164.00 Order
668-4
Ships: Next Day
Price: $164.00
Differential pressure transmitter, range 0-2.5" w.c. Next Day $164.00 Order
668-5
Ships: Next Day
Price: $164.00
Differential pressure transmitter, range 0-5.0" w.c. Next Day $164.00 Order
668-6
Ships: Next Day
Price: $164.00
Differential pressure transmitter, range 0-10" w.c. Next Day $164.00 Order
668-7
Ships: Next Day
Price: $164.00
Differential pressure transmitter, range 0-25" w.c. Next Day $164.00 Order
668-8
Ships: Next Day
Price: $164.00
Differential pressure transmitter, range 0-50" w.c. Next Day $164.00 Order
668-9
Ships: 3-4 Weeks
Price: $164.00
Differential pressure transmitter, range 0-100" w.c. 3-4 Weeks $164.00 Order

Specifications

Service:
Air and non-conductive gases.
Accuracy:
±1% FS (RSS), (includes non-linearity, hysteresis, and non-repeatability).
Temperature Limits:
Operating: 0 to 150°F (-18 to 65°C), Storage: -40 to 185°F (-40 to 85°C).
Pressure Limits:
10 psig (0.69 bar).
Compensated Temperature Range:
0 to 150°F (-18 to 65°C).
Thermal Effects:
0.033% FS/°F (0.18% FS/°C).
Supply Voltage:
12 to 30 VDC.
Output:
4 to 20 mA, 2-wire.
Zero and Span Adjustment:
±1 mA, non-interactive.
Response Time:
<60 msec.
Loop Resistance:
0 to 800 Ω.
Electrical Connection:
Terminal strip.
Pressure Connection:
3/16" OD fitting for 1/4" ID tubing.
Housing:
Fire retardant glass filled polyester.
Weight:
3 oz (85 g).
Agency Approval:
CE.

Features

  • Good accuracy at low pressure ranges provides exceptional value for ensuring control and minimizing costly out of specification conditions
  • High overpressure rating eliminates possible damage to unit reducing unnecessary service time

Accessories

Model Number Description Usually Ships Price Order
4 A-489 4" 303 SS straight static pressure tip with flange. Next Day $6.67 Order
NISTCAL-PT1 NIST traceable calibration certificate for pressure transmitters.NOTE: EQUAL CERTS WILL BE CHARGED PER UNITS PURCHASED. Less Than 1 Week $139.00 Order
303 SS Static pressure tip with mounting flange, for 3/16 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 Next Day $9.20 Order

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