What detection methods are used in contact water leak detectors?

Contact water leak detectors use two monitoring methods: point-type leak detection and cable-type leak detection.

Wall Water Leak Sensor RS485 + Relay Contact Output Flood Alarm Transmitter

Name: Wall Water Leak Sensor RS485 + Relay Contact Output Flood Alarm Transmitter
Brand: Shandong Renke Control Technology Co., Ltd.
SKU: 2184816872

Shandong, ChinaShandong Renke Control Technology Co., Ltd.

US$17.00-34.00

1 Piece

Product profile

Customization

Available

Installation Type

Wall-Mounted Type

Contact

Model NO.

RS-SJ-*-2-*-EX

Output Signal Type

RS485/Relay/RS485+Relay

Output Status

Normally Open

Production Process

Integration

Probe Type

Cable Type

Certification

Customized

Power Supply

DC10-30V

Detection Object

Tap Water, Purified Water

Working Environment

-20℃~+60℃, 0%Rh~95%Rh (Non-Condensing)

Relay Load Capacity

250VAC 1A/30VDC 1A

Transport Package

Box

Trademark

Renke

Origin

Shandong, China

Production Capacity

1000 Pieces/Month

Key features

This industrial water leak detector uses AC detection technology to identify water presence while effectively preventing electrode electrolysis and long-term signal degradation.

It supports RS485 ModBus-RTU communication and relay dry-contact output, enabling seamless integration with PLC, SCADA, and building monitoring systems.

The sensor adopts a waterproof IP65-rated ABS housing, ensuring reliable operation in humid, dusty, and industrial environments.

External leak detection cables or point probes can be extended up to 2600 meters, enabling large-area coverage for data centers and facility floors.

The AC sensing principle allows stable long-term immersion detection without electrode polarization, significantly improving service life and reliability.

It can distinguish different water types such as tap water and purified water based on conductivity characteristics, improving detection adaptability.

DIN rail and wall-mounted installation options support flexible deployment in equipment rooms, pipelines, and underfloor monitoring areas.

Built-in buzzer and relay alarm output (depending on model) provide immediate on-site warning when water leakage is detected.

The system supports long-distance signal transmission and cascading installation, making it suitable for large distributed industrial monitoring networks.

Designed for data centers, telecom rooms, warehouses, hotels, and industrial facilities requiring early water leakage detection and protection.

Company profile

OEM ServicesProduct CertificationPatents AwardedR&D Capabilities

Shandong Renke Control Technology Co., Ltd.

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 10 years CertifiedNearest Port: Qingdao PortAverage Response Time: ≤5.12h

AI-Powered supplier vetting

SummaryShandong Renke Control Technology Co., Ltd. is a technologically advanced medium-sized enterprise with a focus on manufacturing and sales of integrated circuits and environmental monitoring instruments. The company holds ISO9001:2015 certification and offers ODM and OEM services. Despite a strong R&D and customization capability, the supplier lacks in-stock service capacity and overseas presence. Financial data is available but lacks specific performance details. The supplier demonstrates innovation with new products launched in the past year, though SDK availability is absent.

CertificationsThe supplier holds an ISO9001:2015 certificate and complies with RoHS, CE, and FCC standards, indicating strong compliance with quality and international standards.

After-Sales capabilityThe supplier lacks overseas warehouse, showroom, and agent services, and does not participate in offline trade shows, limiting their after-sales service reach.

R&D capabilityThe supplier has launched new products in the last year and provides ODM services, although it does not offer SDKs for development.

Customization capabilityThe supplier offers extensive customization services, including full and minor customization, supported by a robust R&D capability.

Product Q&A

Q:What are the advantages of Renke water leak detectors?

Built-in waterproof sealing strip isolates the internal components from the external environment, providing strong protection against moisture and water ingress. The cable outlet uses a PG7 waterproof connector, preventing circuit damage and ensuring device safety. The probe is encapsulated in waterproof silicone, allowing reliable operation in harsh environments over long periods. The PCB is treated with a protective coating to safeguard the circuitry against moisture, dust, and corrosion.

Q:What is the working principle of a water leak detector?

Our water leak detectors use alternating-current technology to measure accumulated water, enabling accurate detection of leak events. Under normal conditions, the two probe electrodes are insulated by air. When water comes into contact, the two sensing lines are bridged, causing a change in current, and the sensor outputs a dry-contact signal.

Q:What should I do after water leakage is detected?

First find out the leaking location, then close the main valve, repair the leaking place, clean up the stagnant water, and finally open the main valve.

Q:Can the water leak detector be used normally after detecting water leakage?

You can continue to use the sensor after cleaning up the accumulated water of the water leak detector.

Q:How to view data?

The leak detection rope is designed to detect conductive liquid leaks. When connected to our environmental monitoring host, any liquid intrusion along the rope triggers an alarm. Data can be viewed in real time via the cloud platform.