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Transmitter of differential pressure with respect to atmosphere.
Price
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Stock
Out of Stock
Specifications
Brand
Sensor
- Piezoresistive
Resolution
- 1 Pa for f.s. 1000 Pa
- 0.1 mbar for HD404ST5
- 0.05 mmH₂O for f.s. up to 50 mmH₂O
- 0.1 mmH₂O for f.s. 100 mmH₂O
- 0.002” H₂O for f.s. up to 4” H₂O
- 0.01 m/s (only SR versions)
- 0.1 Pa for HD404ST2
- 0.5 Pa for f.s. up to 500 Pa (except HD404ST2)
Output
- HD404T: active analog 0 to 10 Vdc (RLmin =10 kΩ) or 4-20 mA (RLmax = 500 Ω)
- HD404ST: digital RS-485 Modbus-RTU
Response Time
- HD404T with dip-switch set to FAST: 0.125 s in pressure mode 1 s in speed mode (only SR versions)
- HD404T with dip-switch set to LOW: configurable 1, 2 or 4 s (default 2 s)
- HD404ST configurable 0.125, 1, 2 or 4 s (default 2 s)
Overpressure Limit
- 50 kPa
Connection to PC
- HD404T: RS-232 serial port can be connected to a USB port by using the optional CP27 adapter
- HD404ST: can be connected to a USB port by using the optional RS48 adapter
Zero Calibration
- Automatic for the versions with AZ option
Compatible Media
- Only air and non-aggressive dry gases
Power Supply
- HD404T: 24 Vac ± 10 % or 18…40 Vdc
- HD404ST: 12 to 30 Vdc
Absorption
- HD404T: < 1 W @ 24 Vdc
- HD404ST: < 100 mW @ 12 Vdc
Pressure Connection
- Nickel-plated brass, Ø 6 mm
Electrical Connections
- Screw terminal block, max. 1.5 mm2 , PG9 cable gland
Operating Conditions
- -10° C to 60° C (-5° C to 50° C for the models with AZ option), 0 to 95 % RH
Protection Degree
- IP65
Storage Temperature
- -20° to +70° C
