mmWave - 80GHz Liquid Level Detection Sensor (40 Meters)

Q: What should be done if the data is abnormal?

Press the reset button on the development board to ensure that the installation height is set successfully

Q: Has the measurement zero point of the millimeter wave module been calibrated?

The measurement zero point of the millimeter wave module has been calibrated from the antenna surface to the lens end at the factory

Q: Does the range need to be set?

The range does not need to be set, the range will change automatically according to the installation height, and the maximum range is 40m

1. Example Code for Arduino-Liquid Level Detection

The article guides on setting up an Arduino liquid level detection system using a high-precision sensor, offering hardware and software instructions, wiring diagrams, and sample code.

Reference

This article details the UART and Modbus protocol for liquid level detection, including register configurations, API functions, and the principles of FMCW technology.

Parameter	Details
Transmit frequency	77–81GHz, 4GHz bandwidth
Output power (EIRP)	13–20dBm
Beamwidth (-3dB)	Horizontal ±25°, Vertical ±25°
Beamwidth (-3dB) with external lens	Horizontal ±3°, Vertical ±3°
Modulation mode	FMCW
Ranging range	0.15–40m
Accuracy	±5mm
Resolution	1mm
Startup time	100ms (fastest)
Operating voltage	3.5–5V
Operating current	30mA
Output	UART (Modbus protocol)
Operating temperature	-45°C to +85°C
Module dimensions	35×35×1.2mm
Module weight	5g
Weight with installed lens	46g

Pin	Function description
1	VCC 3.7~5V
2	GND
3	NC
4	NC
5	UART_TX
6	UART_RX

Pin	Function description
1	VCC 3.7~5V
2	GND
3	NC
4	UART_RX
5	UART_TX

mmWave - 80GHz Liquid Level Detection Sensor (40 Meters)

Specification

Pinout

1.25-6Pin terminal interface

Right side pad interface