GY-21-HTU21 Humidity & Temperature Sensor
Can be placed in soil to measure moisture and temperature, which makes it ideal for use in a garden or greenhouse. The humidity sensor is also especially useful in building remote weather stations.
$7.95
12 in stock
This item: GY-21-HTU21 Humidity & Temperature Sensor
12 in stock
$7.95
$7.95
Description
Additional information
Applications
Support & Utility
Q & A
GY-21-HTU21 Humidity & Temperature Sensor is a low-cost, easy-to-use, highly accurate digital humidity and temperature sensor.
This sensor is ideal for environmental sensing and data logging and perfect for weather stations for humidity control systems. All you need is two lines for I2C communication, and you’ll have relative humidity readings and very accurate temperature readings as a bonus!
Features:
- 2.1V to 3.6V Supply Voltage
- Low power consumption – 0.15uA typical
- I2C interface
- Resolution: 0.04%RH, 0.02°C
- Accuracy: ±2%RH, ±3°C
- Size: 21mm x 16mmÂ
Package included:1x GY-21-HTU21 Humidity & Temperature Sensor
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Development Resources: Demo Codes, Schematics, Datasheets, Etc
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Notes:
1. There may be slight size deviations due to manual measurement, different measuring methods and tools.
2. The picture may not reflect the actual colour of the item because of different photographing lights, angles and display monitors.
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| Weight | 0.0010 kg |
|---|---|
| Dimensions | 2.2 × 1.7 × .5 cm |
Product Applications
- The Humidity and Temperature Sensor is an Arduino-compatible sensor board that carries an SHT21 digital humidity and temperature sensor from Sensirion. It has a 4-pin interface that can communicate directly with the analogue pins on the Arduino.
- The SHT21 utilizes a capacitive sensor element to measure humidity, while the temperature is measured by a band-gap sensor. Both sensors are seamlessly coupled to a 14-bit ADC, which then transmits digital data to the Arduino over the I2C protocol. Because of the sensor’s tiny size, it has incredibly low power consumption, making it suited for virtually any application.
- To optimize the accuracy of temperature and humidity readings, the SHT21 sensor is placed at the tip of the board, isolating it from heat-producing circuitry. Two of the sensor’s four pins are ground and +5V; the other two are clock and data pins that make up the 2-wire serial interface. The board is 5V tolerant and designed to operate directly off the supply voltage coming from the Arduino.
Current Product Support
| SKU | Product | Type | Download/View |
|---|---|---|---|
| TS-P738 | GY-21-HTU21 Humidity & Temperature Sensor - HTU21 | Datasheet | Download |
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