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HP480/HP481 – Measurement of Dew Point in Compressed Air Systems

Brand: Delta OHM S.R.L.

Compressed air is used for several purposes, many of which require compressed air with a low humidity level, and so comes the need to know the dew point (DP) of water vapour in the compressed air that circulates in the system.

The HP480 and HP481 probes are designed specifically for this purpose.
Features
  • Prevents Corrosion of Metal Pipes;
  • In Cold Areas, Prevents The Formation of Ice Inside The Pipes Leading To Obstruction of The Pipes Themselves;
  • Prevents Bacterial Growth in Plants for Medical Use;
  • Reduces Maintenance Costs of Pneumatic Drives, Maintaining The Proper Lubrication of Moving Parts;
  • Improves The Quality of Products Coming Into Contact With Air, For Example In The Drying Process of Granulates.

1 - 2 of 2 Part Numbers
HP480
HP480
Probes for the measurement of air humidity in pipes. It measures relative humidity and temperature or Dew Point.
HP481
HP481
Probes for the measurement of air humidity in pipes.
1 - 2 of 2 Part Numbers

Specifications

Relative Humidity Sensor

  • capacitive

Relative Humidity Measuring Range

  • 0 to 100 %RH

Relative Humidity Accuracy (@ T = 15…35° C)

  • ± 1,5 %RH (0 to 90 %RH), ± 2 %RH (remaining field)

Relative Humidity Accuracy (@ T = -40…+60° C)

  • ± (1,5 + 1,5 % of the measured value) %RH

Relative Humidity Long Term Stability

  • < 1 %RH/year

Temperature Sensor

  • Pt100

Temperature Measuring Range

  • -40° to +60° C

Temperature Accuracy

  • ± 0,25° C

Dew Point Sensor

  • Parameter calculated from the measurement of temperature and relative humidity

Dew Point Measuring Range

  • -40 to +60° C DP

Dew Point Accuracy (@ T = 20° C)

  • ± 2° C DP (-40 to 0° C DP)
  • ± 1° C DP (0 to +20° C DP)

Connection

  • HP480: G 1/2” or G 1/4” or quick coupling
  • HP481: G 1/2”

Regulation of the Air Flow

  • HP480: From 0,2 to 3 l/min

Cable Length

  • HP480: 2 m
  • HP481: 2 m (other lenghts on request)

Filter

  • Sintered 15 µ AISI 316 steel

Material of the Measuring Chamber

  • AISI 304 stainless steel

Operating Temperature of the Probe

  • -40° to +80° C

Operating Pressure of the Probe

  • HP480: 0 to 16 bar
  • HP481: -1 to 16 bar

Protection Degree

  • IP65

Compatibility with Ethylene Oxide (C2H4O)

  • The Max. allowed concentration in continuous operation which causes a deviation within 2 % is 3 ppm
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