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Airspeed / Temperature / Relative Humidity transmitters (0-10V)

Airspeed / Temperature / Relative Humidity transmitters (0-10V)

  • Used for controlling air speed for conditioning and ventilation applications
  • The cable length of the probe is 5m.
  • Airspeed / Temperature / Relative Humidity sensor
  • Output signal 0-10V, Length probe 255mm


Price on request


Call ATAL (+31) (0)299 630 610


The HD29 series of transmitters… are used for controlling air speed for conditioning and ventilation applications (HVAC/BEMS) in the following sectors:
- pharmacy,
- museums,
- clean rooms,
- ventilation ducts,
- crowded places,
- canteens,
- auditoria,
- gyms or high-density farms,
- as well as industrial and civil sectors.

The sensors in combination with an accurate electronics guarantee precise and reliable measurements in the course of time.
The thin film sensor for air speed, the AISI304 probe sheath, the 20µ metal grid filter for Relative Humidity enable their usage even for hostile applications.

There are two possible installations: in the TO version, the horizontal probe is joined to the electronics enclosure while in the TC version the probe is connected to the electronics through a cable.

In the TO version, the duct probe is fixed to the electronics enclosure and it is available in three different lengths. To fix the probe to the duct, you can use, for example, the HD9008.31 flange, a 3/8” universal biconical connection or a PG16 metal cable gland (diameter 10…14mm).

In the TC version, the probe together with the sensors is equipped with a cable which can be 2, 5 or 10 meters long. The probes are available in three different lengths.


Cable length 5m.
Output signal 0-10V
Length probe 255mm

Common specifications for AT-HD29 product series:

Air speed Measuring ranges (The measuring range can be selected by dip-switch):
- from 0.05 to 1m/s
- from 0.05 to 2m/s
- from 0.05 to 10m/s
- from 0.05 to 20m/s

Air speed Accuracy (at 50%RH and 1013hPa):
- range 0 to 1m/s: ±(0.04m/s+2% of measurement)
- range 0 to 2m/s: ±(0.04m/s+2% of measurement)
- range 0 to 10m/s: ±(0.2m/s+3% of measurement)
- range 0 to 20m/s: ±(0.2m/s+3% of measurement)

Temperature: Only for HD2937, HD29V37, HD29371 and HD29V371 models
- Temperature Measuring range: -10 to 60°C
- Temperature Accuracy: ±0.3°C

Relative Humidity: Only for HD29371 and HD29V371 models
- Relative Humidity Measuring range: 5 to 98%RH
- Relative Humidity Accuracy: ±2% (5 to 90%RH), ±2.5% remaining range
- Relative Humidity Output Range: 0 to 100%RH

Output (according to the models):
- from 4 to 20mA: RL < 500ohm
- from 0 to 10Vdc: RL > 10kohm

Power supply: 16 to 40Vdc or 12 to 24Vac±10%

Response time (selected by jumper):
- Fast 0.2s
- Slow 2.0s

Operating temperature electronics: 0 to 60°C
Operating temperature probe: -30 to 100°C

Compensation temperature 0 to 80°C

Storage temperature: -10 to 70°C

Electronics protection class: IP67

Sensor working conditions: Clean air, RH<90%
Case dimensions: 80x84x44 Without probe



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