Product Descriptions

The HTU21D is a lowcost, easy to use, highly accurate, digital humidity andtemperature sensor. This sensor is ideal for environmental sensing and data logging andperfect for a weather stations or humidor control systems. All you need is two lines for 120 communication and you’l have relative humidity readings and very accurate temperature readings asabonus!

There are only four pins that need to be hooked up in order to start using this sensor in a project. One for VCc, one for GND, and two data lines for l20 communication. This breakout board has built in 4.7k pullup resistors for l20 communications. if you’re hooking up multiple l20 devices on the same bus, you may want to disable these resistors.

Based on high-performance humidity sensing components from Humirel, a French company, the new generation HTU21D temperature and humidity sensor has established new standards in terms of size and intelligence: it is embedded in a double row flat pinless DFN package suitable for reflow soldering, with a bottom surface of 3x3mm and a height of 1.1mm. The sensor outputs calibrated digital signals in standard 12C format. Diversified output methods, wide operating voltage range, and high temperature and humidity accuracy. The HTU21 series module is designed specifically for low-power and small volume applications, with advantages such as good quality, fast response speed, strong anti-interference ability, and high cost-effectiveness. It has a small volume (3x3mm) and extremely low power consumption.

Important parameters of sensors

• Supply voltage: 1.5V-3.6

• Humidity measurement range: 0-RH

• Temperature measurement range:- 40℃-105℃

• Power consumption: 2.7uW

• Communication method: I2C

• Humidity accuracy range (10% RH to 95% RH): HTU21D ± 2% RH

• Humidity hysteresis: ± 1% RH

• Measurement time: 50ms

• Annual drift:- 0.5%RH/year

• Response time: 5 seconds

At the same time, HTU21D can be fully compatible with SHT20 and SHT21 from Switzerland, and pin to pin hardware pins can be implemented without modifying the circuit board. In terms of software programs, it is also the same as Switzerland's SHT20 and SHT21, which can achieve compatibility replacement without making any modifications. At the same time, HTU21D has a good price advantage and cost-effectiveness compared to Swiss SHT20 and SHT21 The HTU21D ultra small volume temperature and humidity integrated digital output module is a high-performance product launched by French sensor manufacturer Humirel. Meanwhile, HTU21D has significant advantages in terms of price, performance, power consumption, and other aspects.

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