Humidity is notoriously difficult to measure. Some of the scientific and electronic considerations to measuring humidity include: analog to digital interface and external circuitry which might require op-amps or oscillator circuitry; temperature compensation adjustments to calculate dew point; calibration against a known humidity source; mounting, protection and response time in the real-world.

The Sensirion SHT1x addresses many of these issues head on. It is a smart sensor for both humidity and temperature, and it comes from the factory in a tiny package that incorporates the analog to digital interface. All that your microcontroller has to do is read out the humidity and temperature values through the two-wire digital serial interface. The only math required is a simple scale and offset. The SHT1x is factory calibrated so that it returns temperature with a resolution of 0.01 degrees Celsius and relative humidity with a resolution of 0.03 percent. The accuracy is better than most other sensors too. Worst-case temperature accuracy is +/- 2 degrees C - but in the "room temperature" range the accuracy is better than +/- 1 degree C. The relative humidity sensor is similarly accurate: +/- 3.5% in the range 20% to 80%. This is quite remarkable for a low-cost sensor. Excellent for commercial or home-based projects that require such readings.

Features:

  • Provides a fully calibrated, digital output
  • Measure temperature with a resolution of 0.01 degrees and within +/- 2 degree accuracy
  • Measures relative humidity with a resolution of 0.03%and within +/- 3.5% accuracy
  • Low power consumption (typically 30 μW)

Key Specifications:

  • Power requirements: 2.4 to 5.5 VDC
  • Communication: Two-Wire Serial
  • Dimensions: 0.43 x 0.49 in (11 x 12.5 mm)
  • Operating temp range: -40 to +254.9 °F (-40 to +123.8 °C)

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Sensirion Temperature/Humidity Sensor

  • Product Code: Temp/Humid
  • Availability: In Stock
  • Rs.5,300.00


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