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HD9408.3B Series – Precision Barometric Transmitters
Brand: Delta OHM S.R.L.
HD9408.3B is a barometric transmitter that uses a piezoresistive high accuracy and temperature-compensated sensor.
It allows to measure the atmospheric pressure in the range from 500 to 1200 hPa, providing extreme accuracy and time stability, with excellent repeatability, low hysteresis, and excellent temperature behavior.
The sensor is factory calibrated at several points and at different temperatures in the range of use.
The transmitter is available in three versions which differ in the output type
- HD9408.3B.1
- Configurable 0 to 5 V or 1 to 5 V analogue voltage output and digital RS232, RS422 or RS485 output. Standard MODBUS-RTU and NMEA 0183 protocols.
- HD9408.3B.2
- Active configurable 0 to 20 mA or 4 to 20 mA current output and digital RS232, RS422 or RS485 output. Standard MODBUS-RTU and NMEA 0183 protocols.
- HD9408.3B.3
- Digital SDI-12 output, compatible with version 1.3 of the protocol.
The watertight housing with IP 67 protection degree allows the use of the instrument even in harsh environments.
The instrument is particularly suitable for meteorological applications (AWOS – Automated Weather Observing Systems), environmental monitoring systems, meteorological and environmental data logging, measurement laboratories, atmospheric pressure compensation in the performance of internal combustion engines, barometric pressure compensation in clean rooms, vehicle emission test.
Its low power consumption makes it ideal for remote acquisition systems such as automatic weather stations powered by solar cells.
Features- Accuracy, Stability, Repeatability
- High Flexibility
- Data Provided According To The Needs
- High Performance In All Environments
- Low Power Consumption
Specifications
Brand
Sensor
- High accuracy piezoresistive
Measuring Range
- HD9408.3B.1 and HD9408.3B.2: digital outputs: 0 to 1350 hPa, analog outputs: 500 to 1200 hPa
- HD9408.3B.3: 100 to 1350 hPa
Resolution
- 0.01 hPa
Accuracy
- ± 0.1 hPa (500 to 1200 hPa) / ± 0.2 hPa (remaining range) @ 23° C
- ± 0.3 hPa (500 to 1200 hPa) / ± 0.4 hPa (remaining range) in the entire temperature
- operating range -40 to +85° C
Measuring Units with Modbus and SDI-12 Protocols
- Pa
- hPa
- kPa
- bar
- atm
- psi
- mmHg
- inHg
- mmH₂O
- ftH₂O
- kg/cm²
- Torr
Long Term Stability at 25° C
- 0.25 hPa/year
Output Signal
- HD9408.3B.1 - RS-485, RS422, RS-232, analog voltage output 0 to 5 / 1 to 5 V
- HD9408.3B.2 - RS-485, RS422, RS-232, analog active current 0 to 20 / 4-20 mA
- HD9408.3B.3 - SDI-12
Warm-Up Time
- 2 s approximately from powering
Measuring Period
- HD9408.3B.1 and HD9408.3B.2: 16 ms
- HD9408.3B.3: upon user request
Analog Output Response Time
- 150 ms to reach 90 % of final value with step pressure input (from 600 to 1000 hPa)
Overpressure Limit
- 3 x f.s.
Compatible Media
- Only dry air and non corrosive gases
Power Supply
- HD9408.3B.1 and HD9408.3B.2: 10 to 30 Vdc
- HD9408.3B.3: 8 to 30 Vdc
Absorption
- HD9408.3B.1 and HD9408.3B.2: < 10 mA @ 12 Vdc
- HD9408.3B.3: < 200 µA @ 12 Vdc (average consumption between two subsequent measurements)
Pressure Connection
- Ø 5 mm flexible tube
Electrical Connections
- M12
Operating Conditions
- -40 to +85° C / 0 to 100 %RH
Storage Temperature
- -40° to +85° C
Housing Material
- Anticorodal
Protection Degree
- IP67
- Meteorology
- Environmental Monitoring
- Measurement Laboratories
- Clean Rooms
- Industry
