RS485 Industrial Grade Temperature & Humidity Sensor Probe -7Semi

What this sensor is

The RS485 Industrial Grade Temperature & Humidity Sensor Probe (7Semi) is a professional industrial sensor used to measure:

• Temperature

• Humidity

Unlike Arduino sensors, this is designed for:

• Industrial automation

• Building management systems

• Smart agriculture

Core Concept (VERY IMPORTANT)

This is NOT a simple sensor like SHT41

It uses:

• RS485

• Modbus RTU

Meaning:

• Data is sent digitally over long distance

• Can connect to PLC, SCADA, industrial systems

Key Specifications

• Temperature Range: -40g>Accuracy:

  • 0.1C (Temp)

  • 11.5% RH

   

• Output: RS485 (Modbus RTU)

• Power Supply: 9V36V DC (some up to 60V)

• Cable Length: ~2 meters

• Resolution: 0.1C / 0.1% RH

How it works

• Internal sensor (often SHT45 class) measures temp & humidity

• Data processed inside module

• Sent via RS485 digital communication

You read values using:

• Modbus commands

• Registers (example: function code 0x03)

Wiring (IMPORTANT)

4-wire connection:

• VCC 936V DC

• GND Ground

• A+ RS485 Data> To connect with Arduino:

  • Use RS485 to TTL converter module

  Key Features

  • Industrial-grade accuracy & stability

  • Long-distance communication (up to ~1200m)

  • Noise-resistant (very important in factories)

  • Waterproof, dust-proof metal probe

  • Plug-and-play with PLC/SCADA

   

  Applications

  • Industrial process monitoring

  • HVAC systems

  • Smart agriculture / greenhouse

  • Data centers

  • Museums & storage rooms

  • Weather stations

   

  munication

More complex than I2C sensors

2. Needs controller (PLC/MCU)

• Cannot work standalone

• Needs:

  • PLC / Arduino / Raspberry Pi

   

3. Power requirement is higher

• Needs 936V, not 3.3V like normal sensors

4. Address configuration

• Uses Modbus ID (1255)

• Configurable via DIP switch or software

RS485 Sensor vs I2C Sensor (SHT41)

Use RS485 probe if you want:

• Industrial automation

• Long-distance sensing

• Reliable outdoor/harsh environment monitoring

• Integration with PLC / SCADA

When NOT to use

Avoid if:

• Beginner Arduino project

• Small IoT device

• Battery-powered system

Final Understanding

This sensor = industrial-grade remote temperature & humidity transmitter Built for real-world d