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The 7Semi RS485 THPG AirSense Probe is a compact industrial-grade environmental sensor designed for multi-parameter climate and air-quality monitoring. It measures Temperature, Humidity, Atmospheric Pressure, and Gas Resistance (for VOC/IAQ evaluation) and communicates using the robust RS485 Modbus RTU protocol.
With high-resolution sensor outputs and a sealed, dust-resistant probe design, this module is ideal for HVAC systems, industrial IAQ monitoring, smart farming, environmental data logging, and weather applications.
This version includes a 2-meter, features a wide 9–36V DC input range, Software configurable Modbus address and baud rate, and onboard signal processing. Fully plug-and-play with SCADA, PLCs, HMIs, and Arduino/MCUs.
Key Features
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Measures Temperature, Humidity, Pressure & Gas Resistance
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RS485 Modbus RTU communication
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Industrial-grade performance
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Fast response and low drift
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Ideal for both indoor and outdoor applications
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Ideal for PLCs, IoT gateways, data loggers, and SCADA
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Wide Input Voltage: 9V–36V DC
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Software Configuration for Modbus ID & Baud Rate
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Easy 4-wire Connection: VCC, GND, RS485 A+, RS485 B−
Wiring Guide
Applications
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Indoor / outdoor air quality monitoring
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Smart agriculture & greenhouse control
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HVAC & ventilation optimization
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Weather stations & climate logging
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Industrial IAQ systems
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Smart city environmental nodes
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Warehouses & clean rooms
Frequently Asked Questions (FAQ)
Q1: Is the sensor compatible with PLCs and SCADA systems?
Yes, the sensor uses RS485 with Modbus RTU, compatible with most industrial automation systems.
Q2: How do I read the sensor values?
Use Modbus function code 0x03 to read two 16-bit registers. Divide by 10 to get the actual values in °C and %RH.
Q3: How is the device configured?
You can set the Modbus address (1–255) and baud rate using Software software . Supported baud rates include 9600, 19200, 38400, and 115200.
Q4: Can I interface this with Arduino?
Absolutely. It includes a sample Arduino wiring and code setup using RS485 to TTL adapters.
What’s Included
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1x 7Semi RS485 THPG AirSense Probe
- Temperature Range:
- -40°C to +125°C
- Humidity Range:
- 0% to 100% RH
- Accuracy (Temp @25°C):
- ±0.1°C
- Accuracy (Humidity @25°C):
- ±1.5% RH
- Resolution:
- 0.1°C / 0.1% RH
- Pressure:
- 300–1100 hPa
- Accuracy (Pressure):
- ±1 hPa
- Gas / Air Quality:
- 32-bit Gas Resistance Output
- Power Supply:
- 9–36V DC
- Output Interface:
- RS485 (Modbus RTU)
- Baud Rates:
- 9600 (default); configurable to 19200, 38400, 115200
- Probe Length:
- 150mm
- Probe Diameter:
- 15.7mm
- Cable Length:
- 2 meters
- Weight:
- 100g
- Protection:
- Breathable, dust-proof
