FG6485 RS485 temperature and humidity transmitter with a metal probe, mounting flange and signal cable
FG6485 component illustration showing the probe filter cap, metal housing, flange and cable
FG6485 duct temperature and humidity probe with a separate mounting flange
FG6485 transmitter shown with installation accessories, instructions and packaging

Flange-mounted configuration with an RS485 interface for air temperature and humidity readings.

FG6485 RS485 Duct Temperature and Humidity Transmitter

Measure air temperature and relative humidity and communicate the readings through an RS485 interface. FG6485 combines a flange-mounted probe with a 12–36V DC supply for integration with compatible controllers, gateways and data acquisition equipment.

  • Temperature and humidity readings through one RS485 communication interface.
  • 12–36V DC power supply for equipment integration.
  • Flange mounting for positioning the probe in a duct or air measuring location.
  • Wiring and device address-setting information for system configuration.
RS485
Digital communication interface
12–36V DC
Power supply
Flange
Duct mounting configuration

Check the communication protocol and settings against your receiving equipment. Include the controller or gateway model if you need help checking compatibility.

Request a Quote

Include your receiving equipment, application, quantity and delivery country.

Specifications & Flange Installation

Check the measuring ranges, supply requirements and RS485 configuration alongside the probe and flange installation dimensions.

FG6485 RS485 temperature and humidity transmitter, flange-mounted configuration.
Specification FG6485
Measured parameters Air temperature and relative humidity
Communication interface RS485
Power supply 12–36V DC
Temperature measuring range −40 to 120°C
Humidity measuring range 0–99.9% RH
Temperature accuracy ±0.3°C at 25°C
Humidity accuracy ±3% RH
Temperature resolution 0.1°C
Default baud rate 9600 bps
Device address setting DIP switches; refer to the address-setting diagram
Sampling interval 3 seconds
Standard cable length 1 m
Installation Flange mounting

Temperature accuracy is specified at 25°C. Typical temperature error near the measuring range extremes is ±0.5°C. Confirm the communication protocol and settings against your receiving equipment.

FG6485 technical graphic showing probe dimensions, flange dimensions and electrical specifications
Open full-size drawing ↗

Probe & Mounting Flange

Check the probe and flange dimensions against your duct opening, insertion position and available installation space.

Mounting
Flange-mounted probe
Sensing point
Probe tip exposed to the air being measured
Connections
DC power supply and RS485 communication wiring

Position the sensing end in representative airflow. FG6485 measures air temperature and humidity; do not immerse the probe in water.

Connect Power, Set the Address and Match the Host

Use the connection diagrams to identify the power and RS485 leads, then configure the device address and receiving equipment.

FG6485 power and RS485 wire identification with a host system connection illustration
Open full-size wiring diagram ↗

01 / Power & Signal Connections

DC Supply and RS485 A/B Lines

FG6485 uses a 12–36V DC supply. Connect the RS485 communication pair to the corresponding terminals on compatible receiving equipment. Follow the supplied diagram for wire colors.

Power positive
DC supply positive connection.
Power negative
DC supply negative connection; follow the equipment documentation for reference and grounding arrangements.
RS485 A
Connect according to the transmitter and host terminal definitions.
RS485 B
Connect the second communication line according to the same wiring diagrams.
FG6485 electrical connection diagram and DIP switch instructions for RS485 device address settings
Open full-size address-setting diagram ↗

02 / Device Address & Host Settings

Configure the Address Before Reading Data

Use the address-setting instructions for the DIP switch positions. Match the host's communication configuration to the transmitter.

  1. Set the device address. Follow the supplied switch diagram. Devices sharing the same bus need distinct addresses.
  2. Match the communication settings. The default baud rate is 9600 bps. Confirm the remaining serial settings against the communication instructions.
  3. Configure data reading. Use the specified protocol, read commands and data interpretation for this model in the receiving controller or gateway.

Checking compatibility? Share your controller or gateway model and its communication requirements. We can provide the available wiring and communication information and confirm product-specific details with the supplier.

Air Temperature and Humidity Readings over RS485

Measure duct or equipment air conditions and communicate the readings to a compatible controller, gateway or data acquisition system.

FG6485 installation illustrations showing flange mounting through a panel and into an air duct
Air measurement installation illustration. Check the flange position, probe insertion and cable route against your installation. Do not immerse the sensing probe in liquids.
Duct Air Measurement

HVAC & Ventilation Ducts

Position the probe inside the duct to measure air temperature and relative humidity. Choose a location with representative airflow and check the probe insertion depth and flange mounting space before installation.

Equipment Integration

Air Handling & Ventilation Equipment

Supply temperature and humidity readings to a compatible equipment controller through RS485. Confirm the controller supports the transmitter's communication protocol and data format, then match the address and serial settings.

RS485 Data Acquisition

Controllers, Gateways & Host Systems

Integrate air measurements into a compatible receiving system. For multiple transmitters on the same bus, assign distinct device addresses and follow the connection diagram. Displaying or storing readings depends on the receiving equipment and its software.

Frequently Asked Questions

Answers about RS485 integration, device addresses, communication settings and probe installation.

Can FG6485 connect to my PLC, controller or gateway?

It can connect to receiving equipment with a compatible RS485 interface and communication protocol. An RS485 port alone does not guarantee that the host can interpret the transmitter's data.

Share the exact controller, communication module or gateway model so we can help check the protocol, serial settings and data-reading requirements.

How does FG6485 differ from FG6010 and FG6020?

FG6485 communicates temperature and humidity readings through RS485. FG6010 provides analog voltage outputs, while FG6020 provides 4–20mA current outputs.

Choose the interface that matches your receiving equipment, then check the power supply, wiring and configuration requirements.

How do I set the address for multiple transmitters?

Follow the DIP switch instructions in the wiring and address-setting section . Transmitters sharing the same bus need distinct device addresses, and the host must use the corresponding address when requesting each device's readings.

These switches configure the device address. Refer to the supplied diagram for the required switch positions.

What communication information do I need for setup?

Check the device address, baud rate, serial format, communication protocol and instructions for reading and interpreting the temperature and humidity data. The default baud rate is 9600 bps.

Request the communication instructions when checking compatibility or placing your order. We can confirm product-specific details with the supplier.

Can FG6485 measure water or other liquids?

FG6485 measures air temperature and relative humidity. Expose the sensing end to the air being measured; do not immerse the probe in water or other liquids.

Describe any condensation, direct spray or unusual air conditions so we can check suitability before you order.

How is this configuration installed and powered?

This page shows the flange-mounted configuration, powered by a 12–36V DC supply. Check the probe dimensions, duct opening, insertion position and available flange mounting space.

Plan the power and communication cable routes, then follow the transmitter and receiving equipment diagrams for the connections.

Request a Quote for FG6485

Need a flange-mounted RS485 temperature and humidity transmitter? Tell us about your application and receiving equipment so we can confirm compatibility, pricing and shipping options.

Include these details if available:

  • Receiving equipment: The controller, PLC communication module or gateway model, and its supported protocol.
  • Measuring conditions: Expected air temperature and humidity, installation location and available DC supply.
  • System requirements: How many transmitters you plan to connect, cable requirements and any communication documents you need.
  • Quantity and destination: How many FG6485 units you need and the delivery country.

Still checking the RS485 connection? Share the receiving device's specifications or describe your setup. We can provide the available wiring and communication information and confirm product-specific details with the supplier.

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