The E-TOP ES-03 is a high-precision wireless temperature and humidity sensor designed for smart home and industrial monitoring. With a compact design and versatile mounting options (wall or desk), it provides reliable environmental data with a long-range wireless distance of over 100 meters.
Item No.: ES-03
Precision Environmental Monitoring: Provides highly accurate real-time temperature and humidity readings for optimal indoor comfort and smart environment management.
Flexible Installation: Supports both surface wall mounting and desktop placement, offering versatile setup options for any room.
Long-Range Wireless Connectivity: Features advanced 433/868/915MHz wireless technology with a transmission distance of over 100 meters, ensuring reliable signal coverage.
Smart Home Integration: Compatible with major smart home assistants, including Amazon Alexa and Google Assistant, for convenient voice control and automation.
Durable & Compact Design: Engineered with a compact φ50*20 mm profile and high-quality PC+ABS materials, designed for long-term reliability and low-maintenance operation.
The ES-03 wireless sensor is engineered to deliver accurate temperature and humidity readings, making it an essential component for your smart ecosystem. It features:
Versatile Installation: Designed for both surface wall mounting and desktop placement.
Broad Compatibility: Works seamlessly with smart home platforms including Amazon Alexa and Google Assistant.
Extended Range: Advanced wireless technology ensures stable connectivity over 100 meters.

ISO Certified Production: Every ES-03 unit is manufactured in an ISO 9001:2015 and ISO 14001:2015 certified facility.
Compliance Standards: Fully certified with CE (RED/EMC/LVD), RoHS, and FCC marks for global market access.
OEM Experience: Backed by E-TOP Controls, a professional manufacturer with over 20 years of experience (since 2003) in ODM/OEM services.
Looking for more environmental monitoring solutions? Explore our full range of professional HVAC sensors for smart building automation
| Model | ES-03 |
| Wireless Technology | 433/868/915Mhz |
| Transmission Range | >100 meters |
| Battery Life | 1 year (CR2450) |
| Protection Class | IP30 |
| Material | PC+ABS |
| Thermostat Dimension | φ50*20 mm |
| Certificate | CE (RED/EMC/LVD), UKCA, FCC, ETL Listed, RoHS, REACH, ISO9001:2015, ISO14001:2015 |
| OEM & ODM | 1. Customized logo and package |
| 2. Customzied software ( change to customer’s user interface and control logic) | |
| 3. Customized hardware ( change the PCB and schematic based on the request) |

A: The ES-03 wireless sensor allows you to track climate conditions remotely via smart home systems, ensuring you can keep an eye on your environment from anywhere.
A: Yes, our sensor is designed to integrate seamlessly into modern smart ecosystems, supporting popular platforms like Amazon Alexa and Google Assistant for convenient automation and voice control.
A: Featuring advanced wireless technology, the ES-03 provides stable connectivity with a transmission distance of over 100 meters, ensuring reliable data sync across your building or home.
A: The ES-03 is built for efficient monitoring; it utilizes high-precision technology to provide accurate and timely environmental data updates.