RTD Pt100 to RS485 Converter, 3 Wire, -190~490℃

5 out of 5 based on 1 reviews | Write a review

$124.56

Good price high-precision Pt100 resistance signal (three-wire) RTD converter with an RS485 (RTU) output for sale. It measures -190~490°C with ±0.1% FS accuracy, operates on 9~28VDC, and features 1500VDC signal isolation for safety. With a compact design, IP54 protection, and reliable performance in -40°C to 80°C, it suits process control, HVAC, power plants, labs, and food industries for precise and durable temperature monitoring.

SKU: ATO-RTD-MPT71

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Delivery date: 6-12 days

Overview

RTD Pt100 to RS485 converter, measuring -190~490°C with ±0.1% FS accuracy. Operates on 9~28VDC, with 1500VDC isolation, IP54 protection, and reliable performance from -40°C to 80°C. Ideal for process control, HVAC, power plants, labs, and food industries.

Specification

Model	ATO-MPT71
Input Signal	Pt100 resistance signal (three-wire)
Output Signal	RS485 (RTU)
Measurement Range	-190~490°C
Power Supply Voltage	9~28VDC
Signal Isolation	1500VDC
Maximum Power	0.72W (at 24VDC supply)
Protection Rating	IP54
Overall Weight	≈118g
Operating Temperature	-40~80°C
Conversion Accuracy	±0.1% FS
Housing	ABS engineering plastic

Feature

Supports Multiple Inputs: Equipped with 7 channels for Pt100 three-wire inputs, making it suitable for multi-point temperature monitoring.
Standard RS485 Output: Outputs temperature data via standard RS485 (RTU) communication for seamless integration with industrial systems.
Signal Isolation Feature: Includes built-in signal isolation to enhance safety and protect connected equipment from electrical interference.
Precision and High Resolution: Delivers accurate temperature signal conversion with exceptional resolution for reliable measurements.
Space-saving Design: Compact structure ensures easy integration into confined control panels or equipment setups.

Dimensions and Wiring Diagram

Pt100 to RS485 converter application

Tips: What are the main applications of this converter?

This converter is versatile and can be used in various industries:

Industrial Process Control: Monitoring and controlling temperature in manufacturing systems like furnaces, chemical reactors, and food production lines.
Energy Systems: Tracking temperature in power plants, turbines, and solar thermal systems.
HVAC Systems: Ensuring efficient heating, ventilation, and air conditioning performance in buildings.
Laboratories and Research: Providing precise temperature measurements for scientific experiments and quality control.
Food and Beverage: Maintaining proper temperatures during processing and storage to ensure product quality and compliance.

Existing reviews of RTD Pt100 to RS485 Converter, 3 Wire, -190~490℃

Precise and stable

I’ve been using this Pt100 to RS485 converter for a few weeks in an HVAC monitoring project, and it has exceeded expectations. The readings are very precise and stable, and the ±0.1% accuracy is definitely noticeable compared to cheaper alternatives. Setup was straightforward, the compact size makes it easy to mount, and the 1500VDC isolation gives extra confidence when running it in an industrial environment. It’s a well-built, reliable unit at a very reasonable price.

From: EVAA | Date: 08/09/2025

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