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Home / Thermo-hygrometers / FULLKON High-Precision Temperature and Humidity Transmitter Sensor RS485 Wireless Wall-Mounted Industrial Thermohygrometer 4-20mA

Attributes

Brand -
Category Machinery & Equipment / Thermo-hygrometers
Origin -
Communication Protocol RS485 Modbus RTU
Output Signal 4-20mA Current Loop
Mounting Type Wall-Mounted Bracket Included
Temperature Range -40°C to +80°C
Humidity Range 0% to 100% RH
Accuracy (Temperature) ±0.3°C at 25°C
Accuracy (Humidity) ±2% RH (10%-90% RH)
Power Supply 12V DC to 24V DC
Protection Rating IP65 Dust and Water Resistant
Display Type Integrated LCD Screen

6 reviews

A

Anonymous

Mar 30, 2026

Rating: 5/5

Easy configuration

Configuring the Modbus address was straightforward. We needed to change the baud rate to match our legacy system, and the dip switches made it very easy to do without special software.

A

Anonymous

Mar 14, 2026

Rating: 5/5

Robust build quality

This thing is built like a tank. We have it in a semi-outdoor loading dock area, and the IP65 rating is holding up well against dust and occasional moisture. The wall mount is sturdy and easy to install.

A

Anonymous

Mar 12, 2026

Rating: 3/5

Good sensor, slow shipping

The product itself works great and measures humidity very responsively. However, the shipping took longer than expected. Once installed, though, it has been running without issues for two months.

A

Anonymous

Mar 09, 2026

Rating: 4/5

Accurate but manual could be better

The sensor accuracy is impressive compared to our old units. It matches our calibrated reference meter almost perfectly. The only downside is the user manual is a bit sparse on wiring diagrams for daisy-chaining multiple devices.

A

Anonymous

Mar 03, 2026

Rating: 5/5

Great value for industrial grade

I've used much more expensive brands in the past, and this FULLKON sensor performs just as well for a fraction of the cost. The LCD display is clear and readable from a distance.

A

Anonymous

Mar 01, 2026

Rating: 5/5

Perfect for our warehouse monitoring

We installed six of these units across our storage facility. The RS485 integration with our existing PLC system was seamless, and the 4-20mA output provides stable readings even over long cable runs. Highly recommended for industrial use.

5 FAQ

Q: Is calibration certificate included with the purchase?

A: Each unit comes with a factory calibration report. If you require an ISO-accredited third-party calibration certificate, please select the 'Add Calibration Certificate' option at checkout or contact our sales team before ordering.

Q: What is the maximum cable length supported for the RS485 connection?

A: Using standard shielded twisted pair cable, the RS485 interface supports distances up to 1200 meters (approx. 4000 feet) depending on the baud rate and cable quality. We recommend using high-quality shielding for industrial environments to prevent interference.

Q: Can I power this directly from a 24V AC source?

A: No, this device requires a DC power supply between 12V and 24V DC. Connecting it directly to 24V AC may damage the internal electronics. Please ensure you use an appropriate AC-to-DC converter if your main supply is AC.

Q: Can this device operate wirelessly without any cables?

A: While the product title mentions 'Wireless' regarding data transmission capabilities in certain configurations, this specific model primarily utilizes RS485 wired communication and 4-20mA analog output. For purely wireless battery-operated versions, please check our specific Wi-Fi or LoRaWAN model listings.

Q: Does the LCD show both temperature and humidity simultaneously?

A: Yes, the integrated LCD screen displays both temperature and humidity values at the same time. It also cycles through additional data such as dew point and current status indicators every few seconds.

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