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Water Leakage Detector FS20701

  • long service life
  • Anti-oxidizing sensor
  • Sensitive response
  • High reliability

Water Leakage Detector FS20701 Introduction

FS20701 is a rail-mounted water immersion sensor with an external sensing electrode that uses the principle of liquid conductivity for detection. During normal operation, the two-pole probe is insulated by air; when immersed in water, the probe becomes conductive and the sensor outputs a dry contact signal. When the immersion height of the probe exceeds the set value, an alarm signal is generated. The input power supply, induction wire, and signal output of the sensor are completely isolated.

After powering on the sensor, it will perform self-checking, and it can output monitoring results after about 3 seconds. It adopts the standard MODBUS-RTU communication protocol, and RS485 signal output, which can set the device address, communication rate, and detection sensitivity to meet the detection requirements of different environments. It is widely used in communication base stations, hotels, restaurants, computer rooms, libraries, archives, warehouses, equipment cabinets, and other places where water immersion alarms are required.

Water Leakage Detector FS20701 Features

The electrode of the sensor is anti-oxidizing with a long service life.

The structure is reasonable, and the reliability is high, with sensitive response.

There are no adjustable components, which makes operation simple and reports any alarm accurately without false alarms.

It has good adaptability and strong compatibility with various signals (interfaces), making it easy to integrate into centralized (monitoring) systems.


Electrical Parameters

Technical Specification

Detection object

Tap water or pure water

Operating voltage

DC 10V~30V (standard 24V)

Operating current


Product power consumption


Detection frequency

Data updates once per second (default)

Output mode


Communication rate


Operating temperature


Operating humidity

0~95%RH (non-condensing)

Installation method

Rail mounting

Reference size


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