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HD408T / HD4V8T Series – Relative and Differential Pressure Transmitters
Brand: Delta OHM S.R.L.
HD408T, HD4V8T are analog output relative or differential atmospheric pressure transmitters; they are used in all those applications where non corrosive air or gas need to be monitored, with pressure fields from 10 mbar to 2000 mbar.
The piezoresistive sensor gives extremely precise and stable measurements of the applied differential pressure, with excellent repeatability, low hysteresis, and very good temperature stability.
The output signal of the sensor is conditioned to provide either a current output (model HD408T) or a voltage output (model HD4V8T) linearly proportional to the applied differential pressure.
The transmitters are ready to use as they have been calibrated at the factory.
They are used to monitor clean room barometric pressure, to control filters, to measure flows (employment with the Pitot tube), for packing and packaging machines, and to control ventilation.
Specifications
Brand
Sensor
- Piezoresistive
Measurement Range
- 10, 20, 50, 200, 500, 1000, 2000 mbar
- ± 10, ± 20, ± 50, ± 200, ± 500, ± 1000, ± 2000 mbar
Output Signal
- HD408T: 4…20 mA
- HD4V8T: 0…10 Vdc standard, 0 … 5 Vdc, 1…5 Vdc on request
Accuracy
- ± 0.5 % Full Scale @ 20° C
Resolution
- Infinite
Temperature Effects
- < 1 % Full Scale, zero, < 1 % Full Scale, span from -20° C to +60° C (from -4° F to 140° F)
Time Stability
- < 1 % Full Scale over 6 months at 20° C
Startup Time
- 1 sec. at 99 % of full scale reading
Response Time
- < 10 ms until it reaches the stated precision by applying a step pressure level
Power Supply
- HD408T: 8…30 Vdc
- HD4V8T: 16…40 Vdc or 24 Vac with output 0…10 Vdc, 10…40 Vdc or 24 Vac with outputs 0…5 Vdc, 1…5 Vdc
Absorption
- HD408T: < 4 mA
- HD4V8T: 20 mA @ 20° C, 24 Vdc
Load Resistance
- HD408T: RLmax = 727 Ω a 24 Vcc, RLmax =Vdc-8 22 mA
- HD4V8T: Min. input resistance 10kΩ
Working Temperature
- -20…+60° C
Storage Temperature
- -20…+80° C
Compatible Media
- Only air and non aggressive dry gases
Overpressure Limit
- 350 mbar for the models 10, 20, 50 mbar
- 3 x f.s. for all the other models
Pressure Connection
- With Ø 5 mm flexible tube
Electric Connection
- Screw terminal box
Housing
- Polycarbonate blend (PC + ABS)
Housing Dimensions
- 66 x 60 x 35 mm
Weight
- ≈120 g depending on the model
Protection Degree
- IP67
