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Series 668 Differential Pressure Transmitter
Brand: Dwyer Instruments, LLCOur 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.
Features- Good accuracy at low pressure ranges provides exceptional value for insuring control and minimizing costly out of specification conditions
- High overpressure rating eliminates possible damage to unit reducing unnecessary service time
Specifications
Brand
Accuracy
- ± 1 % Full Scale (RSS)
Approvals & Certifications
- CE
Compensated Temperature
- -18° to 65° C (0° to 150° F)
Electrical Connectors
- Terminal Strip
Enclosure, Body Material
- Fire Retardant Glass-Filled Polyester
Hysteresis
- ± 1 % of Full Scale
Loop Resistance
- 0 to 800 ohms
Media
- Air
- Non-Conductive Gases
NACE & NIST
- NIST Traceable Calibration Certificate
Operating Temperature
- -18° to 65° C (0° to 150° F)
Output
- 4-20 mA, 2-Wire
Pressure Range
- Inches WC: 0 to 100
Pressure Type
- Differential
Response Time
- < 60 milliseconds
Span & Zero Adjustments
- ± 1 mA, Non-Interactive
Storage Temperature
- -40° to 85° C (-40° to 185° F)
Supply Voltage
- 12-30 Vdc
Temperature Effect
- 0.018 % of Full Scale/°C
- 0.033 % of Full Scale/°F
Tube Connection
- 3/16” O.D. Fitting for 1/4” I.D. Tubing
- Variable air volume systems
- HVAC
- Building management
