SHT20 I2C Humidity and Temperature Sensor Probe (Plastic) -7Semi
What Is the SHT20 Sensor?
The SHT20 is a digital temperature and relative humidity sensor based on a high'precision CMOSens chip from Sensirion. It combines a capacitive humidity sensor and a band-gap temperature sensor with integrated circuitry for signal processing, calibration, and linearization giving reliable digital readings via I2C.
Key Technical Specifications
Humidity measurement range: 0% to 100% RH
Humidity accuracy: 3% RH typical
Temperature range: 40C to +125C
Temperature accuracy: 0.3C typical
Interface: I2C digital output (standard address 0x40)
Supply voltage: 2.1V
The sensor is factory-calibrated and linearized, meaning you get accurate temperature and humidity values right out of the box.
Probe Version Features
The 7Semi plastic probe adds:
Protective plastic housing for safe usage in indoor/outdoor environments
~1m cable for flexible placement
Built-in pull-up resistors and filter capacitors for easy microcontroller interfacing
This makes it practical for applications like weather monitoring, smart homes, HVAC, or industrial environments.
Communication
The sensor uses the I2C protocol:
SDA: serial data
SCL: serial clock
VCC & GND: power supply
Multiple I2C sensors can share the same bus as long as they pical Uses
Weather and environment monitoring
HVAC and air quality control
Smart home IoT projects
Greenhouse and agriculture automation
Industrial process control
Research and educational labs
Typical Microcontroller Setup
Wiring Example (Arduino / ESP32 / Raspberry Pi):
Connect VCC to 3.3V (or 5V if supported)
Connect GND to ground
Connect SDA to microcontroller SDA pin
Connect SCL to microcontroller SCL pin
Use an I2C library to read sensor data (e.g., Wire.h for Arduino, smbus for Raspberry Pi)
This lets you read humidity and temperature with just a few lines of code.
Summary: The 7Semi SHT20 probe is a ready-to-use sensor with I2C interface, offering high accuracy, low power, and simple integration into microcontroller projects.