French Humirel digital output temperature and humidity sensor HTU21D replaces SHT21, SHT20 - HTU21D

I. DigitalTemperature and humidity sensor HTU21D replaces SHT21, SHT20Product description:

New digital temperature and humidity composite sensorHTU21DSets a new standard for humidity sensor size and intelligence: uses reflow-solderable DFN package, only 3 x 3 x 1mm in size; provides calibrated, linear I²C digital output signal.

HTU21D is a composite sensor for humidity and temperature, ideal for OEM applications requiring reliable and accurate measurement. The digital humidity and temperature signals can be directly interfaced with a microcontroller. Each sensor is calibrated and tested, and the batch number is not only printed on the housing but also stored in the sensor chip for reading via commands. Users can change the resolution of HTU21D (8/12bit to 12/14bit) via commands.

In addition, the sensor can also detect low battery and checksum to improve communication reliability.

HTU21D has low power consumption, high cost performance, and small size, making it suitable for price-sensitive and space-constrained OEM mass production applications. It can fully replace SHT21 and SHT20. HTU21D sensors have discounts for bulk orders. Welcome to inquire.

Used in industries such as engines and motor vehicles, medical, industrial control, consumer electronics, and home appliances.

II. Features of digital temperature and humidity sensor HTU21D replacing SHT21, SHT20:

• Fully interchangeable, no recalibration required
• Rapid recovery after long-term saturation
• Suitable for automated assembly processes such as lead-free reflow soldering
• Individually identified, meeting strict traceability requirements      

III. Application fields of digital temperature and humidity sensor HTU21D replacing SHT21, SHT20

Used in industries such as engines and motor vehicles, medical, industrial control, consumer electronics, and home appliances.

IV.Parameter comparison of digital temperature and humidity sensor HTU21D with SHT21, SHT20

Model	HTU21D	SHT21	SHT20
Supply voltage:	1.5V—3.6v	2.1V—3.6V	2.1V—3.6V
Humidity measurement range:	0—100%RH	0—100%RH	0—100%RH
Temperature measurement range:	-40℃—105℃	-40℃—105℃	-40℃—105℃
Power consumption:	2.7uW	3.2uW	3.2uW
Communication method:	I2C	I2C	I2C
Humidity accuracy range (10%RH to 95%RH)	HTU21D  ±2%RH	SHT21 ±2%RH	SHT20 ±3.5%RH
Humidity hysteresis:	±1%RH	±1%RH	±1%RH
Measurement time:	50ms	50ms	50ms
Annual drift:	-0.5%RH/year	-0.5%RH/year	-0.5%RH/year
Response time:	5s	8s	8s

SHT21 and SHT20 have smaller size compared to SHT11 and SHT10. At the same time,HTU21Dcan be fully compatible with the SwissSHT20、SHT21achieving Pin-to-Pin compatibility on hardware pins without modifying the circuit board. The software program is also the same as the Swiss SHT20 and SHT21, allowing compatible replacement without any modifications. At the same time, HTU21D has a better price advantage compared to Swiss SHT20 and SHT21, offering high cost performance.