7Semi High-Precision Temperature & Humidity Sensor Probe

Overview

The 7Semi High-Precision Temperature & Humidity Sensor Probe is a digital environmental sensing probe designed for accurate measurement in industrial and embedded systems.

• Measures:

  • Temperature

  • Relative humidity

   

• Built using Sensirion SHT series (SHT40 / SHT41 / SHT45 class sensors)

• Comes in a probe format with cable + protective housing

Designed for remote sensing in harsh or inaccessible environments

Working Principle

• Humidity sensing:

  • Capacitive polymer sensing element changes capacitance with moisture

   

• Temperature sensing:

  • Bandgap / thermistor-based sensing

   

• Internal system:

  • ADC + digital processing

  • Factory calibratid digital output

   

Outputs fully processed values (no external calibration required)

Measurement Characteristics

Temperature

• Range: 40C to +125C

• Accuracy:

  • 0.2C (SHT41 typical)

  • Up to 0.1C (SHT45 high-end)

   

Humidity

• Range: 0% to 100% RH

• Accuracy:

  • 1.8% RH typical

  • Up to 1% RH (higher-end variants)

   

Resolution

• 16-bit digital output

Electrical Characteristics

• Operating Voltage: ~3.3V

• Ultra-low power consumption:

  • Idle: nanoamp range

  • Active: very low (suitable for battery systems)

   

Communication Inng> 0x44

Easy integration with microcontrollers (Arduino, ESP32, etc.)

Probe Design & Construction

Housing

• Stainless steel porous enclosure

• Features:

  • Breathable membrane

  • Dust & moisture protection

  • Corrosion resistance

   

Cable & Connector

• Typical cable length: ~1 meter

• Connector: MRS (Mini Round Shell type)

Environmental Durability

• Works in:

  • High humidity / condensing environments

  • Corrosive atmospheres

  • Industrial environments

   

• Features:

  • Anti-pressure capability (~150 bar)

  • Dustproof and anti-contamination design

   

Internal Features

• Factory calibrated (NIST traceable)

• Built-in heater:

  • Redurement stability

   

• Unique serial ID for traceability

Performance Characteristics

• High repeatability and long-term stability

• Fast response due to breathable probe design

• Stable operation in dynamic environments

Functional Behavior

• Continuously measures:

  • Ambient temperature

  • Relative humidity

   

• Outputs:

  • Fully processed digital data via I2C

   

• Heater can be activated for:

  • Dehumidifying sensor surface

  • Improving accuracy in high RH

   

Key Technical Features

• High accuracy (0.10.2C, 11.8% RH)

• Wide operating range

• 16-bit digital output

• I2C interface

• Industrial-grade probe housing

• Low power consumption

• Long-term stability and calibration

Advantages

• Suitable fo

• Remote sensing via probe + cable

• No external calibration required

• High precision compared to low-cost sensors

Limitations

• Slightly higher cost than basic sensors

• Requires proper airflow for best accuracy

• Heater increases power consumption when used

Technical Summary

The 7Semi high-precision probe is a professional-grade temperature & humidity sensing solution that:

• Combines accurate sensing + rugged probe design

• Provides stable, calibrated digital output

• Is optimized for industrial, HVAC, environmental monitoring, and IoT systems