HTU21D Temperature & Humidity Sensor

High-Precision Digital Sensing Element: Built around TE Connectivity's HTU21D sensor IC, providing digital relative humidity and temperature measurements with high stability and fast response times.

Standard I2C Bus Communication: Operates over a 2-wire I2C interface with a fixed address (0 x 40), allowing easy bus integration with microcontrollers while saving digital GPIO pins.

Factory Calibrated Signal: Fully calibrated internally with individual calibration coefficients stored in memory, eliminating the need for manual sensor calibration.

Integrated Onboard Logic & Voltage Regulation: Onboard circuitry supports 3.3V to 5V logic levels and power supplies, making it directly compatible with 5V Arduino boards and 3.3V ESP/Raspberry Pi microcontrollers.

Ultra-Low Power Consumption: Features low active current draw and energy-saving sleep modes, making it an excellent choice for battery-powered environmental monitoring nodes.

Board Material: Red FR-4 glass-epoxy breakout PCB with gold-plated pin header pads, onboard pull-up resistors, and protective SMD components.

Technical Specifications:

Input Voltage: 3.3V – 5.0V DC.

Temperature Measurement Range: -40°C – +105°C (-+ 0.3°C accuracy at 25°C).

Humidity Measurement Range: 0% – 100% RH (-+ 2% RH accuracy from 20% – 80% RH).

Communication Protocol: I2C Interface.

Board Color: Red PCB with White Markings.

Usage Advice: Connect VCC and GND properly before establishing SDA/SCL data lines; ensure appropriate I2C pull-up resistors are active on the bus line.

Maintenance: Keep the central sensor aperture free from dust, liquid immersion, and harsh solvent vapors to prevent sensor drift or permanent damage.

Essential High-Accuracy Climate Sensor Breakout: Position as an accurate, low-cost digital upgrade over basic entry-level sensors like the DHT11 for weather stations, indoor air quality monitors, and home automation nodes.

Highlight Plug-and-Play I2C Bus Integration: Emphasize how the I2C digital output and broad microcontroller library support simplify code development for Arduino, ESP32, and Raspberry Pi platforms.

Recommended Cross-Sell Add-ons: Pair with AHT10 - temperature and humidity sensor, GY-SHT30 3.3V Digital Temperature & Humidity Sensor, AM2302 (DHT22) Temp & Humidity Sensor, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Temperature Sensor Modules collection page as your standard digital I2C temperature and humidity breakout module.