The KWL801 radar water level meter is a non-contact liquid level measuring instrument based on high-frequency millimeter wave technology, designed for high-precision water level monitoring needs. The product adopts advanced FMCW (frequency modulated continuous wave) radar technology, with high measurement accuracy, strong anti-interference ability, good environmental adaptability and other characteristics, and is widely used in water conservancy and hydrology, urban drainage, industrial process control and other fields.
The product antenna adopts a high-performance circular polarization common antenna design, integrating the shell and the antenna into one, which greatly improves the airtightness of the product contact area.
The product uses Bluetooth wireless technology to achieve safe and convenient on-site configuration and maintenance. The debugging and operation tasks on site are realized through the efficient and intuitive software graphical interface of the mobile phone

- Shorter wavelength, better signal reflection, small beam angle, concentrated energy, enhanced echo and avoidance of damage
- Less interference, more convenient installation
- Integrated lens design, compact size
- Small blind spot, especially suitable for use in short distances
- High signal-to-noise ratio, high performance under unstable wave conditions
- Intelligent functions are designed to make life easier, communicating through Bluetooth wireless technology, convenient for on-site maintenance
| Model | 4-20mA Water Level Sensor | RS485 Water Level Sensor |
| Installation method | bracket, thread | bracket, thread |
| frequency range | 76GHz-81GHz | 76GHz-81GHz |
| Measuring range | 65m | 65m |
| Measurement accuracy | (±1mm) | (±1mm) |
| Communication method | 4-20mA/HART | RS485/ MODBUS |
| Power supply range | 18-28V DC | 9-28V DC |
| Cable | Cable length 10m | Cable length 10m |
| Shell material | Aluminum alloy, stainless steel, PP | stainless steel, PP |
| Process temperature | -30~70℃ | -30~70℃ |
| Process pressure | -0.1~0.1mpa | -0.1~0.1mpa |
| measurement interval | 800ms | 500ms |
| Maximum power consumption | 4-20mA/HART(20mA) | RS485/ MODBUS (15mA) |
| Beam angle | 6° | 6° |
| Protection level | IP68 | IP68 |
| Blind area | 0.1m-12m | 0.3m-65m |
| Debug | PC Host computer/IOS Android | PC Host computer/IOS Android |
| Wireless bluetooth | Bluetooth (Optional) | Bluetooth (Optional) |
| bluetooth range | 12m | 12m |
| bluetooth standard | Bluetooth5.0 | Bluetooth5.0 |
| Packing size | 27*23*11 | 27*23*11 |
| Application scope | Rivers, lakes, reservoirs, cisterns, wells, tanks | Rivers, lakes, reservoirs, cisterns, wells, tanks |