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Digital Humidity Sensor is Smallest Available

Mon, 03/29/2010 - 11:03am

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SHT21 humidity and temperature sensor Presented as the smallest digital humidity and temperature  sensor available, the SHT21 from Sensirion  measures 3.0 x3.0 x 1.1 mm. The device consists of a sensor chip encapsulated (except the humidity-sensing area) in a DFN 3-0 package . The fully calibrated state of the sensor and I2C interface ease integration. Analog output modes (such as PWM) are available on request. The digital communication mode enables superb low power consumption: A value in the range of 3?W at normal operation cab be achieved and may be lowered further by increasing the measurement interval. Typical sensor accuracy is ±2% RH over 20–80% RH and ±0.3 °C over 25–42 °C.

The SHT21 has been qualified in accordance with automotive standard AEC-Q100. Furthermore, an extended quality assurance program guarantees low PPM values. A scan path routine enables detailed sensor quality checking, while individual detailed tracking information on the chip can be read out by a simple command. Additionally, the SHT21 is reflow solderable without any degradation of sensor performance.

Free samples of the SHT21 humidity and temperature sensor can be ordered at www.sensirion.com/mysht21.

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