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Delta OHM

Riels® Instruments is the official DELTA OHM distributor and offers a wide range of products for measuring temperature, humidity, pressure, wind speed, illuminance and noise.

As a distributor, Riels® Instruments is committed to providing customers with the highest quality products, guaranteeing a specialized and professional technical assistance service.

We are your DELTA OHM partner! Riels® Instruments is the distributor of all DELTA OHM products.


Below are some of the thousands of DELTA OHM items. If you request the missing code or ask for our advice.

We have expert knowledge of all DELTA OHM products and their applications and are able to recommend any installation or replacement.

For expert advice and rapid product supply  contact Riels® Instruments today or send an email to: info@riels.it

In summary, the partnership between DELTA OHM and Riels® Instruments represents a guarantee of quality and reliability for customers looking for high precision electronic measuring instruments and a professional support service.

The company is committed to offering a high quality service, aimed at satisfying the needs of its customers.

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HD404ST Pressure differential transmitter
Price €217.00
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Suitable for air or dry gas. Pressure Transmitters are instruments that convert a pressure change into an electrical signal. They are sized and supplied with variable accuracies, output signals and process connections according to individual process requirements.
  • Measuring range up to 100 mBar
  • Process temperature -10...+60°C
  • Atex approval Only safe zone
  • Accuracy up to 0.8% of the read value
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HD404T Pressure differential transmitter
Price €195.00
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Suitable for air or dry gas. Pressure Transmitters are instruments that convert a pressure change into an electrical signal. They are sized and supplied with variable accuracies, output signals and process connections according to individual process requirements.
  • Measuring range up to 1000 Pa
  • Process temperature -10...+60°C
  • Atex approval Only safe zone
  • Accuracy 0,8% Full scale
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HD48 Temperature, humidity, and Dew point transmitters
Price €171.00
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Active transmitters of temperature, relative humidity and dew point - standard active analogue output 4÷20 mA or 0÷10V or with RS485 MODBUS-RTU serial output. HD48 transmitters are used for temperature, relative humidity and dew point control in HVAC/BEMS.

  • Measuring range up to 100% UR | Up to 150°C
  • Protection degree IP66
  • Atex approval Only safe zone
  • Signal output 4÷20 mA | 0÷10V | RS485 MODBUS-RTU
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HD49 Temperature, humidity, and Dew point transmitters
Price €171.00
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Temperature, relative humidity and dew point temperature transmitters, available with passive 4÷20 mA analogue output. HD49 transmitters are used to control temperature, relative humidity and dew point in HVAC/BEMS.

  • Measuring range up to 100% UR | Up to 150°C
  • Protection degree IP66
  • Atex approval Only safe zone
  • Signal output 4÷20 mA
Product Detail
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