--- product_id: 206620113 title: "HiLetgo RS485 SHT20 Temperature Humidity Sensor Module High Precision Temperature Humidity Monitor Transmitter Sensor Probe Compatible to Modbus with 1M Lead" price: "SAR 76" currency: SAR in_stock: true reviews_count: 3 url: https://www.desertcart.com.sa/products/206620113-hiletgo-rs485-sht20-temperature-humidity-sensor-module-high-precision-temperature store_origin: SA region: Saudi Arabia --- # Lightning-protected RS485 interface ±3% RH humidity precision ±0.3°C temperature accuracy HiLetgo RS485 SHT20 Temperature Humidity Sensor Module High Precision Temperature Humidity Monitor Transmitter Sensor Probe Compatible to Modbus with 1M Lead **Price:** SAR 76 **Availability:** ✅ In Stock ## Summary > 🌟 Elevate your environmental monitoring game with precision and power! ## Quick Answers - **What is this?** HiLetgo RS485 SHT20 Temperature Humidity Sensor Module High Precision Temperature Humidity Monitor Transmitter Sensor Probe Compatible to Modbus with 1M Lead - **How much does it cost?** SAR 76 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.sa](https://www.desertcart.com.sa/products/206620113-hiletgo-rs485-sht20-temperature-humidity-sensor-module-high-precision-temperature) ## 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 - • **Wide Operating Range:** Operate confidently from -20°C to 60°C and 0-80% RH, perfect for diverse environments. - • **Low Power Consumption:** Efficient 0.3W max power usage keeps your systems green and cost-effective. - • **Robust RS485 Connectivity:** Seamlessly integrate with Modbus protocol and enjoy lightning protection for uninterrupted data flow. - • **Industrial-Grade Precision:** Experience ultra-reliable temperature & humidity monitoring with a high-accuracy SHT20 probe. - • **Customizable Device Addressing:** Set device addresses from 1-255 for flexible network configurations and easy scalability. ## Overview The HiLetgo RS485 SHT20 Sensor Module delivers industrial-grade temperature and humidity monitoring with ±0.3°C and ±3% RH accuracy. Featuring a lightning-protected RS485 interface compatible with Modbus protocol, it supports flexible device addressing (1-255) and operates efficiently across -20°C to 60°C and 0-80% RH. Ideal for professionals demanding reliable, scalable, and precise environmental data. ## Description Description: This RS485 SHT20 Temperature Humidity Sensor adopts industrial-grade chip and high precision temperature and humidity probe to ensure the excellent reliability, high precision and interchangeability of the products. RS485 hardware interface (with lightning protection design), the protocol layer compatibility standard industry Modbus protocol. Specifications: Working voltage: 9-36V Maximum power: 0.3W Operating temperature: -20 ℃ ~60 ℃, humidity 0% RH~80% RH Accuracy: Temperature ± 0.3 ℃ (25 ℃), humidity ± 3% RH (25 ℃) Output interface: RS485 (standard Rtu protocol) Device address: can be set to 1-255, the default is 1 Baud rate: 9600, 8 bits of data, 1 stop, no parity Wiring instructions: Red: Positive Power Black: Negative Power Yellow: 485-A White: 485-B Package Included: 1* RS485 SHT20 Temperature Humidity Transmitter Sensor Module Review: Works but generates heat - Seems to work fine, but if you have it on constant power (and FYI it works on 5V), it generates and measures heat: 81F reading in a 77F environment, with relative humidity skewed acccordingly. You can compensate in software or in its registers, but for accurate measurements it may need to be on switched power (eg mosfet), only on when measuring. Review: Works well, but fairly squirrely addressing & compensating adjustment - Red wire is supply (+) Black wire is supply (-) Yellow wire is data(+) White wire is data(-) Relative addressing is fine unless/until the implementation is wrong. Frankly it's MUCH less time consuming overall to give the MB addresses in both absolute and relative terms, as is done in virtually all professional data sheets. Register 0 (relative) is defined by the Modbus standard as (read code x04) 30001 for input registers and (read code x03) 40001 for holding registers. Register 1 (relative) is 30002 or 40002 and so on. To clarify - in *absolute* addressing terms: Register 30002 = Temp in C x10 (divide by 10 for correct value) Register 30003 = Humidity % x 10 (divide by 10 for correct value) MB addr. node is register 40258, valid values 1-247 Baud rate is register 40259, valid values 9600, 14400, 19200. Temp. comp. is register 40260, valid values +/- 100 (i.e. +/- 10.0 deg. C) Hum. comp. is register 40261, valid values +/- 100 (i.e. +/- 10.0%) Thankfully, once you get past the derp, the sensor works just fine. ## Features - RS485 SHT20 Temperature Humidity Sensor Module - High Precision Temperature Humidity Monitor Sensor - Industrial-grade chip and high precision temperature and humidity probe to ensure the excellent reliability - RS485 hardware interface (with lightning protection design), the protocol layer compatibility standard industry Modbus protocol. ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 3.6 out of 5 stars 13 Reviews | ## Images ![HiLetgo RS485 SHT20 Temperature Humidity Sensor Module High Precision Temperature Humidity Monitor Transmitter Sensor Probe Compatible to Modbus with 1M Lead - Image 1](https://m.media-amazon.com/images/I/51N9OgH-dSL.jpg) ![HiLetgo RS485 SHT20 Temperature Humidity Sensor Module High Precision Temperature Humidity Monitor Transmitter Sensor Probe Compatible to Modbus with 1M Lead - Image 2](https://m.media-amazon.com/images/I/51l+JwqORJL.jpg) ![HiLetgo RS485 SHT20 Temperature Humidity Sensor Module High Precision Temperature Humidity Monitor Transmitter Sensor Probe Compatible to Modbus with 1M Lead - Image 3](https://m.media-amazon.com/images/I/51ITG5I6g4L.jpg) ![HiLetgo RS485 SHT20 Temperature Humidity Sensor Module High Precision Temperature Humidity Monitor Transmitter Sensor Probe Compatible to Modbus with 1M Lead - Image 4](https://m.media-amazon.com/images/I/61SCCJa4v6L.jpg) ![HiLetgo RS485 SHT20 Temperature Humidity Sensor Module High Precision Temperature Humidity Monitor Transmitter Sensor Probe Compatible to Modbus with 1M Lead - Image 5](https://m.media-amazon.com/images/I/61GS1enPF+L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ Works but generates heat *by A***M on August 12, 2026* Seems to work fine, but if you have it on constant power (and FYI it works on 5V), it generates and measures heat: 81F reading in a 77F environment, with relative humidity skewed acccordingly. You can compensate in software or in its registers, but for accurate measurements it may need to be on switched power (eg mosfet), only on when measuring. ### ⭐⭐⭐⭐ Works well, but fairly squirrely addressing & compensating adjustment *by K***S on July 4, 2025* Red wire is supply (+) Black wire is supply (-) Yellow wire is data(+) White wire is data(-) Relative addressing is fine unless/until the implementation is wrong. Frankly it's MUCH less time consuming overall to give the MB addresses in both absolute and relative terms, as is done in virtually all professional data sheets. Register 0 (relative) is defined by the Modbus standard as (read code x04) 30001 for input registers and (read code x03) 40001 for holding registers. Register 1 (relative) is 30002 or 40002 and so on. To clarify - in *absolute* addressing terms: Register 30002 = Temp in C x10 (divide by 10 for correct value) Register 30003 = Humidity % x 10 (divide by 10 for correct value) MB addr. node is register 40258, valid values 1-247 Baud rate is register 40259, valid values 9600, 14400, 19200. Temp. comp. is register 40260, valid values +/- 100 (i.e. +/- 10.0 deg. C) Hum. comp. is register 40261, valid values +/- 100 (i.e. +/- 10.0%) Thankfully, once you get past the derp, the sensor works just fine. ### ⭐⭐⭐⭐ Works fine but poorly documented *by A***C on March 22, 2024* Use function address 0x04 (read input register) register 0x01 (2 bytes) is temperature register 0x02 (2 bytes) is humidity both registers need to be divided by 10 (ex. 215 means 21.5C) ## Frequently Bought Together - HiLetgo RS485 SHT20 Temperature Humidity Sensor Module High Precision Temperature Humidity Monitor Transmitter Sensor Probe Compatible to Modbus with 1M Lead - 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 --- ## 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.com.sa/products/206620113-hiletgo-rs485-sht20-temperature-humidity-sensor-module-high-precision-temperature](https://www.desertcart.com.sa/products/206620113-hiletgo-rs485-sht20-temperature-humidity-sensor-module-high-precision-temperature) --- *Product available on Desertcart Saudi Arabia* *Store origin: SA* *Last updated: 2026-09-25*