AM2301 / DHT21 Temperature/Humidity Sensor
AM2301 output calibrated digital signal. It utilizes exclusive digital-signal-collecting-technique and humidity sensing technology, assuring its reliability and stability.Its sensing elements is connected with 8-bit single-chip computer. Every sensor of this model is temperature compensated and calibrated in accurate calibration chamber and the calibration-coefficient is saved in type of programme in OTP memory, when the sensor is detecting, it will cite coefficient from memory. Small size & low consumption & long transmission distance(20m) enable DHT21 to be suited in all kinds of harsh application occasions.
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Specifications |
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Sensor |
AM2301 / DHT21 |
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Power supply |
3-5.5V DC
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Output |
Digital (1 Wire) |
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Sensing element |
Polymer resistor |
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Temp range
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-40 ~ +80 *C
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Temp precission |
±0.5 |
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Humidity precission |
±3% RH |
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Sensing period |
Average: 2s
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Dimensions |
59*27*13mm |
