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SensironSHT11_LRG

Sensirion Temperature/Humidity Sensor — SHT11

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Описание товара

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. If you’re interested in the details see Tracy Allen’s web site (EME Systems) for his discussion.

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 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)

Downloads & Resources:
Arduino Library
Sensirion Kit Documentation (.pdf)
Sensirion SHT1x Documentation and Source Code (.zip)
Sensirion SHT1x Data Sheet (.pdf)
Javelin Stamp Example Code (.zip)
N&V column «Environmental Sensing» #91 (.pdf)
N&V code «Environmental Sensing» #91 (.zip)
Sensor Objects for Propeller Programmers

Dimensions (inc. headers):

  • Length: 12.69mm/0.50in
  • Width: 11.16mm/0.44in
  • Height: 11.56mm/0.46in
  • Weight: 1.03g/0.04oz

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