--- product_id: 167232944 title: "SHT30 RS485 Modbus RTU Temperature and Humidity Sensor Transmitter for PLC and DCS Room Thermocouple Monitoring" price: "HK$493" currency: HKD in_stock: true reviews_count: 8 url: https://www.desertcart.hk/products/167232944-sht30-rs485-modbus-rtu-temperature-and-humidity-sensor-transmitter-plc store_origin: HK region: Hong Kong --- # Humidity 0-100% RH RS485 Modbus-RTU interface Temp range -30°C to 80°C SHT30 RS485 Modbus RTU Temperature and Humidity Sensor Transmitter for PLC and DCS Room Thermocouple Monitoring **Price:** HK$493 **Availability:** ✅ In Stock ## Summary > 🌟 Elevate your environment monitoring — precision and connectivity that keep you ahead! ## Quick Answers - **What is this?** SHT30 RS485 Modbus RTU Temperature and Humidity Sensor Transmitter for PLC and DCS Room Thermocouple Monitoring - **How much does it cost?** HK$493 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/167232944-sht30-rs485-modbus-rtu-temperature-and-humidity-sensor-transmitter-plc) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Customizable Communication:** Supports multiple output protocols including RS232, CAN, 4-20mA, Zigbee, LoRa, WiFi, and GPRS for future-proof connectivity. - • **Industrial-Grade Precision:** High-accuracy sensing core ensures ±0.5°C and ±3% RH reliability for mission-critical environments. - • **Seamless System Integration:** Universal RS485 Modbus-RTU protocol guarantees plug-and-play compatibility with PLCs and DCS systems. - • **Wide Environmental Tolerance:** Operates flawlessly from -40°C to 80°C and 5% to 90% RH, built for real-world industrial conditions. - • **Effortless Installation & Monitoring:** Standard wiring and default 9600 baud rate simplify setup, empowering you to monitor temperature and humidity with zero downtime. ## Overview The SHT30 RS485 Modbus RTU sensor is a robust industrial transmitter designed for precise temperature (-30°C to 80°C) and humidity (0-100% RH) monitoring. Featuring a high-accuracy sensing core and universal RS485 Modbus-RTU interface, it integrates seamlessly with PLC and DCS systems. Its wide operating range and customizable communication protocols make it the go-to solution for reliable, real-time environmental data in demanding industrial settings. ## Description Product description Description using the standard RS485 bus MODBUS-RTU protocol,easy access to PLC，DCS and other instruments or systems for monitoring temperature,humidity state quantities.The internal use of high-precision sensing core and related devices to ensure high reliability and excellent long-term stability,can be customized RS232,RS485,CAN,4-20mA,DC0~5V\10V,ZIGBEE,Lora,WIFI,GPRS and other output methods. Parameter Temperature measuring range -30℃~80℃ Temperature measuring accuracy ±0.5℃ @25℃ Humidity measuring range 0~100%RH Humidity accuracy ±3%RH @25℃ Communication Interface RS485 Default baud rate 9600 8 n 1 Power DC6~24V 1A Running temperature -40~80°C Working humidity 5%RH~90%RH Wiring methods Yellow A+ RS485A+ Blue B- RS485B- Green GND Power- Red VIN Power+ Review: A few hints... - Excellent for price. n = no parity. My PLC only allows 400001 as starting address, where the instructions said 40001. However, when I entered 400001 it did not matter, it gave me the results. Don't forget to divide the numbers by 100 to get the correct temperature and % humidity. Convert from Deg C to Deg F by multiplying by 1.8 and adding 32. I also forgot to hook up the red wire. It works fine with 24 VDC. Review: Works fine, with some unexpected behavior - Works fine, you just have to poll function code 03 (holding registers) and the transducer I received had slave address 01. Temperature is located at register 1 (address 0) and humidity is register 2 (address 1). IMPORTANT I found that if you poll more than 2 registers in one message, the transducer seems to go into an 'auto broadcast' mode, where it automatically transmitts on a 1-2 second interval. This gave me a bit of a headache. ## Features - industrial universal standard RS485 bus MODBUS-RTU protocol interface - PLC and DCS for monitoring - Temperature measurement range -30°C~80°C - Humidity measurement range 0~100%RH - Humidity measurement accuracy ±3%RH @25°C ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.4 out of 5 stars 31 Reviews | ## Images ![SHT30 RS485 Modbus RTU Temperature and Humidity Sensor Transmitter for PLC and DCS Room Thermocouple Monitoring - Image 1](https://m.media-amazon.com/images/I/51n2ozn6f0L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ A few hints... *by K***N on March 19, 2022* Excellent for price. n = no parity. My PLC only allows 400001 as starting address, where the instructions said 40001. However, when I entered 400001 it did not matter, it gave me the results. Don't forget to divide the numbers by 100 to get the correct temperature and % humidity. Convert from Deg C to Deg F by multiplying by 1.8 and adding 32. I also forgot to hook up the red wire. It works fine with 24 VDC. ### ⭐⭐⭐⭐ Works fine, with some unexpected behavior *by P***R on April 4, 2024* Works fine, you just have to poll function code 03 (holding registers) and the transducer I received had slave address 01. Temperature is located at register 1 (address 0) and humidity is register 2 (address 1). IMPORTANT I found that if you poll more than 2 registers in one message, the transducer seems to go into an 'auto broadcast' mode, where it automatically transmitts on a 1-2 second interval. This gave me a bit of a headache. ### ⭐⭐⭐⭐⭐ Works as expected *by T***S on January 16, 2024* It connected right up to my USB-to-RS485 interface, and my PC could read it right away using python's pymodbus module. Value agrees with other temperature sensors. ## Frequently Bought Together - Taidacent SHT30 RS485 Modbus RTU Temperature and Humidity Sensor Transmitter for PLC and DCS Room Thermocouple Monitoring - USB to RS485 Converter Industrial Adapter Original FT232RL and SP485EEN Fast Communication Embedded Protection Circuits Resettable Fuse ESD Protection - HiLetgo RS485 SHT20 Temperature Humidity Sensor Module High Precision Temperature Humidity Monitor Transmitter Sensor Probe Compatible to Modbus with 1M Lead --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hk/products/167232944-sht30-rs485-modbus-rtu-temperature-and-humidity-sensor-transmitter-plc](https://www.desertcart.hk/products/167232944-sht30-rs485-modbus-rtu-temperature-and-humidity-sensor-transmitter-plc) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-07-02*