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 Mount Water Leak Transmitter RS485+Relay Dual Output Water Immersion Sensor IP54 OLED Display Flood Alarm

Name: Wall Mount Water Leak Transmitter RS485+Relay Dual Output Water Immersion Sensor IP54 OLED Display Flood Alarm
Brand: Shandong Renke Control Technology Co., Ltd.
SKU: 2167819142

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: ≤5.04h

AI-Powered supplier vetting

SummarySHANDONG RENKE CONTROL TECHNOLOGY CO., LTD. is identified as a Jinan-based trading company operating in manufacturing-related industries, including integrated circuits and environmental monitoring instruments. The supplier reports ISO9001:2015, RoHS, CE, and FCC certifications. It provides extensive customization and ODM services, has introduced new products within the past year, and reports OEM service for well-known brands. Production-related information includes sensor productivity of 400,000 pieces and five quality inspectors, although finished-product inspection has instructions but no written records. The supplier lacks inventory, overseas warehouses, overseas agents or branches, and a valid manufacturing-capacity contract with affiliated subcontractors. Financial records are referenced for 2022–2024, but no monetary figures or detailed financial indicators are provided. Customer evidence is limited to one associated buyer name and does not establish the scope or quality of completed projects.

CertificationsThe supplier reports an ISO9001:2015 certificate and product certifications including RoHS, CE, and FCC. These certifications explicitly support quality-management and product-compliance capability.

After-Sales capabilityThe supplier reports no inventory capability, no overseas warehouse, no overseas showroom, and no overseas agents or branches. It also reports serving zero countries overseas, so the provided evidence does not demonstrate strong after-sales coverage, particularly internationally.

R&D capabilityThe supplier reports new products within the past year, provides ODM services, and offers customization from samples, designs, and full specifications. However, it reports no available SDK, so innovation capability is supported in product development and design services but not across all technical-development resources.

Production capacityThe supplier reports sensor productivity of 400,000 pieces, five quality inspectors, and production equipment including an MST mounter and auto-soldering and soldering capabilities. Nevertheless, it has no valid manufacturing-capacity contract with affiliated subcontractors, and its inspection and supplier-assessment procedures lack written records, limiting assurance of production control.

Customization capabilityBoth reported design-service fields list customization from samples, designs, full customization, minor customization, and flexible customization. The supplier also reports ODM capability, providing explicit evidence of broad customization support.

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.