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Description: Digital humidity and temperature sensor
Temperature measuring principle: PTAT (integrated)
Temperature measuring range: -40...+125 °C
Accuracy temperature: ±0.2 °C (0...+60 °C)
Response time temperature: T63: < 12 s
Long-term drift temperature: < 0.05 K/a
Reproducibility temperature: ±0.1 K
Humidity measuring principle: Capacitive polymer humidity sensor
Humidity measuring range: 0...100% RH
Response time humidity: T63: < 12 s with membrane filter
Accuracy humidity: ±1.8% RH at +23 °C
Long-term drift humidity: < 0.5% RH/a
Reproducibility humidity: 0.2% RH
Humidity linearity error: < ±1% RH
Hysteresis: < ±1% RH
Tk residual error: 0.05% RH/K (at 0...+60 °C)
Dimensions: (LxWxH) 15.3 x 10.2 x 5.3 mm
Connection: SIL connectors, pluggable, RM 1.27 mm
Digital interface: I²C, address 0x28 or alternative address
Operating voltage: 2.7...5.5 V DC
Power consumption: typ. < 22 µA at 1 Hz measuring rate, 850 µA maximum
Weight: 0.0006 kg

Precision, reliability and long-term stability are the main characteristics for our digital humidity and temperature sensors with I²C interface.

The digital humidity and temperature sensor HYT221 is splash water protected and suitable for outdoors because of its waterproof membrane filter, which is installed in a circular stainless steel tube.

The digital humidity and temperature sensor is dew resistant and temperature compensated with I²C interface. Further advantages are a low hysteresis, compensated linearity error and temperature drift. The sensor is mechanically robust, directly exchangeable without adjustment, and chemical resistant. The circular stainless steel tube can be installed in housing openings and can be sealed with an O-ring seal against the wall. In connection with the waterproof membrane filter you get a construction which even resists splash water and which enables housing constructions with high dynamic of the response characteristic.


Typical areas of application

  • Meteorological Devices
  • Industrial and Medical equipment
Title File name File Size File extension Date Download
Datasheet digital humidity-temperature-sensor HYT221 0381 0017 Datasheet_digital_humdity-temperature-sensor_HYT221_0381_0017 1049kb pdf 2025-07-02 05:44
Datenblatt digitaler Feuchte-/Temperatursensor HYT221 0381 0017 Datenblatt_digitaler_feuchte-temperatursensor_HYT221_0381_0017 998kb pdf 2025-07-02 05:44
I2C-protocol I2C-protocol 787kb zip 2025-08-11 07:45
Description: Digital humidity and temperature sensor
Temperature measuring principle: PTAT (integrated)
Temperature measuring range: -40...+125 °C
Accuracy temperature: ±0.2 °C (0...+60 °C)
Response time temperature: T63: < 12 s
Long-term drift temperature: < 0.05 K/a
Reproducibility temperature: ±0.1 K
Humidity measuring principle: Capacitive polymer humidity sensor
Humidity measuring range: 0...100% RH
Response time humidity: T63: < 12 s with membrane filter
Accuracy humidity: ±1.8% RH at +23 °C
Long-term drift humidity: < 0.5% RH/a
Reproducibility humidity: 0.2% RH
Humidity linearity error: < ±1% RH
Hysteresis: < ±1% RH
Tk residual error: 0.05% RH/K (at 0...+60 °C)
Dimensions: (LxWxH) 15.3 x 10.2 x 5.3 mm
Connection: SIL connectors, pluggable, RM 1.27 mm
Digital interface: I²C, address 0x28 or alternative address
Operating voltage: 2.7...5.5 V DC
Power consumption: typ. < 22 µA at 1 Hz measuring rate, 850 µA maximum
Weight: 0.0006 kg

Precision, reliability and long-term stability are the main characteristics for our digital humidity and temperature sensors with I²C interface.

The digital humidity and temperature sensor HYT221 is splash water protected and suitable for outdoors because of its waterproof membrane filter, which is installed in a circular stainless steel tube.

The digital humidity and temperature sensor is dew resistant and temperature compensated with I²C interface. Further advantages are a low hysteresis, compensated linearity error and temperature drift. The sensor is mechanically robust, directly exchangeable without adjustment, and chemical resistant. The circular stainless steel tube can be installed in housing openings and can be sealed with an O-ring seal against the wall. In connection with the waterproof membrane filter you get a construction which even resists splash water and which enables housing constructions with high dynamic of the response characteristic.


Typical areas of application

  • Meteorological Devices
  • Industrial and Medical equipment
Title File name File Size File extension Date Download
Datasheet digital humidity-temperature-sensor HYT221 0381 0017 Datasheet_digital_humdity-temperature-sensor_HYT221_0381_0017 1049kb pdf 2025-07-02 05:44
Datenblatt digitaler Feuchte-/Temperatursensor HYT221 0381 0017 Datenblatt_digitaler_feuchte-temperatursensor_HYT221_0381_0017 998kb pdf 2025-07-02 05:44
I2C-protocol I2C-protocol 787kb zip 2025-08-11 07:45

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Art.Nr.: SHOP 0381 0006

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Frequently asked questions & answers

We generally offer standard shipping via DPD. You can also pick up your order yourself or ship with your own tracking number. You can select the option you prefer during the ordering process.

You find more information about this topic on our rights of withdrawal page.

You can pay with PayPal, credit card (VISA and MaserCard), payment in advance, Sofortüberweisung (direct banking) and in some cases invoice. You can find more information on the page shipping and payment.

Yes, at B+B we can manufacture customised items for you with a minimum order value of €500.00.

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Certifications

Thank to the latest research, development and manufacturing technologies, as well as DIN EN ISO 3001:2015 and DIN EN 61340-5-1 certifications, we produce our products in accordance with the highest quality standards.

Calibration service

The B+B calibration laboratory is accredited by the German Accreditation Body (DAkkS) in accordance with DIN EN ISO/IEC 17025:2018 for the thermodynamic measurement parameters of temperature and relative humidity.

Individual manufacturing

You tell us your application and we will supply you with the right product for measurement and monitoring. We place particular emphasis on close cooperation in order to guarantee optimal product development in live with your requirements.

Location

B+B Thermo-Technik GmbH is based in the town Donaueschingen south-west Germany. From here, B+B quality products are distributed worldwide.