Series 685 Differential Pressure Transmitter
Push-Button Zeroing, Adjustable Pressure Range and Response Time
The Series 685 Differential Pressure Transmitter is used to measure differential pressure and vacuum. The adjustable pressure range and output signal make it the ideal choice for installers and maintenance professionals. It has a user-configurable response time via a jumper and can be mounted in any orientation. Applications include building automation systems, clean room monitoring, valve and flap control, filter monitoring, and air flow control. It has an adjustable pressure range, a single button to zero, and can be reset to factory settings with a long button press. No additional 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
Starting at $43.56
Specifications
- 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. *Accuracy specifications are based on measurements at 73°F (23°C).
Features
- 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
Product Literature
Manuals
Catalog Pages
Product Data Sheet
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| Model | Description | Availability* | Price | |
|---|---|---|---|---|
| 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 | 1-3 days* |
$12.40 |
|
| A-360 | Aluminum DIN rail - only available in 1 m length (2.8 ft). | 1-3 days* |
$11.35 |
|
| A-480 | Plastic static pressure tip | 1-3 days* |
$2.15 |
|
| A-489 | 4" 303 SS straight static pressure tip with flange, 1/4" hose barb. | 1-3 days* |
$9.50 |
|
| A-685-DIN | DIN rail adapter kit for Series 685 | 1-3 days* |
$14.25 |
|
| SCD-PS | 100 to 240 VAC/VDC to 24 VDC power supply | 1-3 days* |
$40.75 |
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