GLYN – High-Tech Distribution

Humidity and Temperature Sensors

Humidity sensors from Sensirion with CMOSens®

   
Feuchtesensoren mit CMOSens

Capacitive humidity sensor principle

In addition to the resistive method, the capacitive measurement principle, above all, established and proved itself as a standard in the past. For this principle, the sensor element is built out of a capacitor. The dielectric is a polymer which absorbs or releases water proportional to the relative environmental humidity, and thus changes the capacitance of the capacitor. This change in capacitance can be measured by an electronic circuit. This allows the relative air humidity to be determined. For humidity sensors with CMOSens® technology, a "micro-machined" finger electrode system with different protective and polymer cover layers forms the capacitance for the sensor chip, and, in addition to providing the sensor property, simultaneously protects the sensor from interference in ways previously not achieved.

 

Humidity, temperature and dew point

The temperature sensor and the humidity sensor together form a single unit. This also enables an accurate and point-precise determination of the dew point, without incurring errors due to temperature gradients between the humidity and the temperature sensors. Through the unique linkage of these sensor elements with the signal amplifier unit, the analog-to-digital converter, the calibration data memory, as well as the digital, bus-ready interface, all on a surface area of a few square millimeters.

Highest stability and performance

Total coverage with condensation or even immersion in liquid present no problems whatsoever. Over two years of hardness tests have already shown this result. The signal amplification near the sensor allows the polymer layers to be optimized not for the signal strengths, but rather for long-term stability, which is significant for numerous applications. The analog-to-digital conversion, which is also performed "in place," makes the signal extremely insensitive to noise. A checksum generated by the chip itself is used for additional reliability. Last but not least, the calibration data loaded on the sensor chip guarantees that Sensirion humidity sensors have identical specifications and thus they can be replaced 100%. Other obvious advantages are the very short response times (4 sec at 1/e), high precision (±2% to ±5% according to configuration), as well as very low power consumption (< 3mA standby).

Digital Interface

Humidity and temperature sensors with CMOSens® technology can be connected directly to any microprocessor system by means of the digital 2-wire interface, which minimizes the system development times, saves costs, and leads to a significant advantage, especially for high-volume applications.

Contact: Stefan Besier
  Tel.: +49 6126 590-231
  Fax: +49 6126 590-188
  Email: sensirion@glyn.de


SHT1x Series

SHT10 SHT11 SHT15

SENSIRION Humidity and Temperature Sensors

SHT10 / SHT11 / SHT15

  • S-Bus Interface
  • 0…100% RH
  • -40…123,8 °C
  • 2.4...5.5 V Supply Voltage
  • 7.5 x 4.9 x 2.6 mm SMD Package
  more more

SHT2x Series

SHT20 / SHT20P / SHT20S / SHT21 / SHT21P / SHT21S / SHT25

SENSIRION Humidity and Temperature Sensors

SHT20 / SHT20P / SHT20S / SHT21 / SHT21P / SHT21S / SHT25

  • I²C, PWM, or SDM Interface
  • 0…100% RH
  • -40…125 °C
  • 2.1...3.6 V Supply Voltage
  • 3 x 3 x 1.1 mm DFN Package
  more more

SHT3x Series

SHT3x_200px

SENSIRION Temperatur- und Feuchtesensoren

 new SHT30-DIS / SHT31-DIS / SHT30-ARP / SHT31-ARP

  • I²C, Ratiometric Voltage Out
  • 0…100% RH
  • -40…125 °C
  • 2.4...5.5 V Supply Voltage
  • 2.5 x 2.5 x 0.9 mm DFN Package
  more more

SHT7x Series

SHT71 SHT75

SENSIRION Humidity and Temperature Sensors

SHT71 / SHT75

  • S-Bus Interface
  • 0…100% RH
  • -40…123,8 °C
  • 2.4...5.5 V Supply Voltage
  • 19.5 x 5.08 x 3.1 mm Pin-type Package
  •  

      more more

    SHTC1

    SHTC1

    SENSIRION Humidity and Temperature Sensors

    SHTC1

  • I²C Interface
  • 0…100% RH
  • -30…100°C
  • 1.62...1.98 V Supply Voltage
  • 2 x 2 x 0.8 mm DFN Package 
  •  

      more more

    STS21 Series

    STS21_200px

    SENSIRION Temperatursensoren

    STS21

    • I²C Interface
    • -40…125°C
    • 2.1...3.6 V Supply Voltage
    • 3 x 3 x 1.1 mm DFN Package 
      more more

    STSC1 Series

    STSC1_200px

    SENSIRION Temperatursensoren

    STSC1

    • I²C Interface
    • -40…125°C
    • 1.62...1.98 V Supply Voltage
    • 2 x 2 x 0.7 mm DFN Package 
      more more

    Sensirion Company Portrait