685-01-V | Differential pressure transmitter | 0-2
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Documents: 685-01-V

Instruction ManualSeries 685 Catalog Page685 More Info

685-01-V | Differential pressure transmitter | 0-2" wc | 0-10 V output | Dwyer

Differential pressure transmitter, 0-2" wc, 0-10 V output

Brand: DwyerSKU: 685-01-V
Dwyer | 685-01-V
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Overview Details for 685-01-V

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Differential pressure transmitter | 0-2" wc | 0-10 V output

Series 685 Differential Pressure Transmitter

Push-Button Zeroing, Adjustable Pressure Range and Response Time

The Series 685 Differential Pressure Transmitter is used to measure differentialpressure and vacuum. The adjustable pressure range and output signal make it theideal choice for installers and maintenance professionals. It has a user-configurableresponse time via a jumper and can be mounted in any orientation. Applicationsinclude building automation systems, clean room monitoring, valve and flap control,filter monitoring, and air flow control. It has an adjustable pressure range, a singlebutton to zero, and can be reset to factory settings with a long button press. Noadditional reference pressure sources or separate calibration devices are necessary.

Product Applications

  • Building automation, air-conditioning and clean room technology
  • Valve and shutter control
  • Filter, ventilator and fan monitoring
  • Air-flow control
  • Cost effective and compact device suitable for OEM applications where space, simplicity, and value are key
  • Single button to zero saves maintenance time
  • Factory restore to defaults with a long button press
  • User-adjustable response time provides versatility for many applications

Specifications

Series
685 Differential Pressure Transmitter
Category/Type
Pressure
Type
Differential Pressure
Series
685 Differential Pressure Transmitter
Service
Air and non-corrosive gases.
Sensor Type
Piezoresistive pressure sensor.
Output Signal
2-wire: 4-20 mA; 3-wire: 0-10 V.
Supply Voltage
2-wire: 18-30 VDC; 3-wire: 18-30 VAC/DC
Loop Resistance
2-wire: 500 Ω max; 3-wire: ≥ 1 kΩ (≤ 10 mA)
Maximum Current Draw
2-wire: 21 mA; 3-wire: 40 mA.
Accuracy*
≤ ±0.5% RSS (BFSL); ± 1Pa.
Thermal Effects*
See model-dependent specifications table.
Long-Term Stability*
≤ ±1% RSS per year.
Temperature Limits
-4 to 158°F (-20 to 70°C).
Humidity Limits
0 to 95% RH; non-condensing.
Response Time
1 s (default) or 200 ms (user selectable).
Pressure Connections
6 mm hose connection.
Electrical Connection
Spring connector for cable and leads up to 1.5 mm² .
Cable Conduit
Cap nut conduit; 15 mm (across flats); made of polyamide.
Mounting
Screw fastening with sheet metal screws.
Housing Material
ABS.
Housing Dimensions
Ø 66 x 28 mm.
Enclosure Rating
IP54.
Weight
1.6 oz (46 g).
Compliance
CE; UKCA.

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