7Semi SHT20 MRS Type I2C Humidity and Temperature Sensor Probe
7Semi SHT20 MRS type I2C humidity and temperature sensor probe, based on the Sensirion SHT20 digital sensor for accurate environmental measurement.
Overview
The 7Semi SHT20 MRS Type I2C Sensor Probe is a digital temperature and humidity sensing probe based on the Sensirion SHT20 sensor.
Measures:
Temperature
Relative Humidity
Provides fully calibrated digital output (I2C)
Designed for industrial, outdoor, and remote sensing applications
Combines sensor + protective probe + cable in one unit
Working Principle
Humidity sensing: Capacitive polymer element detects moisture changes
Temperature sensing: Bandgap-based sensor
Internal system:
Signal conditioning
ADC conversion
Digital linearization
Output is pre-calibrated, linear digital data
Temperature
Range: 40C to +125C
Accuracy: 0.3C (typical)
Humidity
Range: 0% to 100% RH
Accuracy: 3% RH (typical)
Response Time
Humidity: 8 s
Temperature: 5 s
Electrical Characteristics
Operating Voltage: 3.3V (typical), up to 5V supported
Current Consumption: < 1 mA (active)
Suitable for low-power embedded systems
Communication Interface
Protocol: I2C (digital)
Wiring:
VCC
GND
SDA
SCL
Easy integration with microcontrollers (Arduino, ESP32, etc.)
Probe Design (MRS Type)
Construction
Stainless steel porous probe housing
Mini Round Shell (MRS) connector
Cable length: ~1 meter
Features
Breathable shell for accurate humidity sensing
Dust and particle filtering (5120 m pores)
Waterproof / IP65 protection
Environmental Durability
Works in:
High humidity
High temperature
Dusty or corrosive environments
Features:
High pressure resistance (~150 bar)
Anti-corrosion and anti-contamination design
Long-term stability with minimal drift
Internal Features
CMOSens technology (Sensirion)
Factory calibration (multi-point)
Digital signal processing
Low drift over time
Functional Behavior
Continuously measures:
Ambient temperature
Relative humidity
Outputs:
No need for:
External ADC
Calibration routines
Key Technical Features
Wide measurement range
Digital I2C output
Fully calibrated sensor
Stainless steel probe housing
Waterproof and dustproof design
High environmental resistance
Low power consumption
Advantages
Suitable for industrial and outdoor use
Remote sensing via probe + cable
High durability and long lifespan
Easy MCU integration
Limitations
Moderate accuracy compared to newer sensors (SHT4x series)
Response time slower than bare-chip sensors
Requires airflow for best humidity accuracy
Technical Summary
The SHT20 MRS probe is a rugged digital temperature & humidity sensor system that:
Combines CMOS sensing + industrial probe desigrong>stable, calibrated digital output
Is optimized for harsh environments and remote sensing applications
It is best classified as an industrial-grade environmental probe sensor, not just a basic breakout mod