HD21ABE - Indoor Air Quality Measurement

Brand: Delta OHM S.R.L.

HD21ABE - Indoor Air Quality Measurement

Brand: Delta OHM S.R.L.
The HD21ABE is a datalogger with a memory capacity of 67600 recordings, divided in 64 blocks.

It uses the DeltaLog10 software. Reference Standards: ASHRAE 62.1 – 2004, Legislative Decree 81/2008.

These regulations apply to all confined spaces that could be used by people.

Kitchens, baths, changing rooms and swimming pools are included, due to the presence of high humidity.

You should take into account, in regard to air quality, possible chemical, physical and biological contaminants.
  • The instruments have a wide Dot Matrix graphic display with a resolution of 160×160 dots. The instruments typical applications are:
  • Measurement of IAQ (Indoor Air Quality) and comfort conditions in schools, offices and indoor spaces.
  • Analysis and study of the Sick Building Syndrome, and of the resulting consequences.
  • Checking the HVAC (Heating, Ventilation and Air Conditioning) system efficiency.
  • Examination of IAQ conditions in factories to optimize microclimate and improve productivity.
  • Building Automation checks.


Instrument Dimensions (Length x Width x Height)

  • 210x90x40 mm (HD21AB)
  • 300x90x40 mm (HD21AB17 with probe)

Operating Temperature

  • -5° C to 50° C


  • 470 g (batteries included)


  • ABS
  • Rubber

Working Relative Humidity

  • 0-85 % Relative Humidity without Condensation


  • Backlit, Dot Matrix 160 x 160 dots, visible area 52 x 42 mm

Warehouse Temperature

  • -25° to 65° C

Protection Degree

  • IP30

Instrument Uncertainty

  • ± 1-Digit @ 20° C

Mains Adapter (Code SWD10)

  • 12 Vdc/1A


  • 4 x 1.2 V Ni-MH Rechargeable Batteries AA Type


  • 8 Hours of Continuous Use in Measure Mode

Power Absorbed with Instrument Off

  • < 45 mA

Security of Stored Data

  • Unlimited

Socket Interface

  • mini-USB

Socket Type

  • USB 1.1 or 2.0 not insulated

Baud Rate

  • 460800

Data Bits

  • 8


  • None

Stop Bits

  • 1

Flow Control

  • Xon-Xoff

Cable Length

  • Maximum 5 m


  • Divided in 64 blocks

Storage Capacity

  • 67600 recordings.

Logging Interval

  • Selectable among: 15, 30 seconds, 1, 2, 5, 10, 15, 20, 30 minutes and 1 hour

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