7Semi SHT41 Temperature & Humidity Sensor Breakout with I2C Qwiic Interface

🔹 Overview
The 7Semi SHT41 Breakout is a high-precision digital temperature and humidity sensor module based on the Sensirion SHT41 sensor.
Measures relative humidity and temperature
Uses fully calibrated digital output (I2C)
Integrates Qwiic connector for plug-and-play interfacing
It belongs to the SHT4x series, known for high accuracy, low power, and long-term stability.
🔹 Working Principle
Uses CMOSens® technology (Sensirion) combining:
Capacitive humidity sensing
Bandgap temperature sensing
Internal ADC converts signals → 16-bit digital output
Factory calibration ensures:
Linearized output
No external calibration required
🔹 Measurement Characteristics
🌡️ Temperature
Range: –40°C to +125°C
Accuracy: ±0.2°C (typical)
💧 Humidity
Range: 0% to 100% RH
Accuracy: ±1.5% to ±1.8% RH
📊 Resolution
16-bit digital output
🔹 Electrical Characteristics
Supply Voltage:
Core: 1.08V – 3.6V
Breakout: typically 3.3V–5V compatible
Current Consumption:
Active: ~0.45 mA
Ultra-low power modes available
👉 Suitable for battery-powered IoT systems
🔹 Communication Interface
Protocol: I2C (digital)
Connector: Qwiic (4-pin, plug-and-play)
Supports:
Multiple I2C addresses
Fast and reliable communication
🔹 Performance Characteristics
Response Time: ~8 seconds (τ63%)
High repeatability and stability
Resistant to environmental drift
🔹 Internal Architecture
Capacitive humidity sensing element
Temperature sensor
Integrated ADC (16-bit)
Digital signal processing unit
Calibration memory
🔹 Functional Behavior
Measures:
Ambient temperature
Relative humidity
Outputs:
Fully processed digital data
No need for:
External ADC
Calibration routines
🔹 Key Technical Features
High accuracy (±0.2°C, ±1.5% RH)
Wide operating range
Ultra-low power consumption
Fully calibrated digital output
I2C + Qwiic interface
Compact and lightweight design
Long-term stability with minimal drift
🔹 Advantages
Reliable measurements across wide environmental conditions
Easy integration due to plug-and-play Qwiic system
Suitable for precision environmental monitoring
🔹 Limitations
Moderate response time (~8s)
Sensitive to:
Condensation
Direct water exposure
Requires proper placement for accurate readings
🔹 Technical Summary
The SHT41 breakout is a high-accuracy environmental sensor module that:
Provides precise temperature and humidity data
Uses advanced CMOS sensing + digital processing
Is optimized for low-power and embedded systems