HD402 Series – Low Pressure Transmitters

Brand: Delta OHM S.R.L.

HD402 Series – Low Pressure Transmitters

Brand: Delta OHM S.R.L.
The presence of very pure air, i.e. with a very low content of microparticles of suspended dust, is in some fields mandatory. 

In the industrial and scientific research and microelectronics industry in general, in the field of bottling and food and moreover in the pharmaceutical field, cleanrooms are used to always ensure a controlled atmosphere.

Especially in these applications, a highly precise and reliable instruments are indispensable for the measurement of differential pressure.

The series of small and compact transmitters HD402xT… is suitable for measuring relative pressure with respect to atmosphere or differential pressure in the range from as low as 0-50 Pa to 0-200 kPa .
Features
  • Accurate and Reliable
  • Great Flexibility
  • Immediate and Direct Reading
  • Easy To Set Up and Quick To Install

Specifications

Sensor

  • Piezoresistive, high stability

Output

  • HD402T: active analog 0…10 Vdc (RLmin =10 kΩ) or 0/4…20 mA (RLmax = 500 Ω)
  • HD402AT: 2-wire (current loop) 4…20 mA (RLmax = (Vcc-12)/0,022)
  • HD404ST: digital RS-485 Modbus-RTU

Response Time

  • 0.5 seconds for the display updating For transmitters: configurable 0.125, 1, 2 or 4 seconds for the output

Connection to PC

  • HD402T/ HD402AT RS-232 serial port can be connected to a USB port by using the optional CP27 adapter
  • HD402ST: can be connected to a USB port by using the optional RS48 adapter

Zero Calibration

  • Manual

Compatible Media

  • Only air and non-aggressive dry gases

Power Supply

  • HD402T: 24 Vac ± 10 % or 18 to 40 Vdc
  • HD402AT/ HD404ST: 12 to 30 Vdc

Absorption

  • HD402T/ HD402AT: < 1 W @ 24 Vdc
  • HD402ST: < 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 to +60° C / 0 to 95 % RH

Storage Temperature

  • -20° to +70° C

Protection Degree

  • IP65

  • Control of HVAC 
  • Filter Control 
  • Clean Rooms Monitoring 
  • Pneumatic Control 
  • Respirators 
  • Vaporizers

Documentation

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