What's in the package list?

Optical water leak sensor * 1 Self-tapping screws * 2 Expansion plugs * 2 L-shaped bracket * 1 Certificate of conformity and warranty card Z-shaped bracket (optional) USB to 485 converter (optional)

What is the difference between an optical water leak sensor and a conductive leak sensor?

A conductive leak sensor detects water through electrical conductivity between metal probes. An optical leak sensor uses infrared light and does not rely on water conductivity. Therefore, optical sensors can detect non-conductive liquids, while conductivity sensors may have difficulty detecting these liquids.

RS485 Modbus Photoelectric Water Leak Sensor Optical Liquid Flood Monitoring Transmitter

Name: RS485 Modbus Photoelectric Water Leak Sensor Optical Liquid Flood Monitoring Transmitter
Brand: Shandong Renke Control Technology Co., Ltd.
SKU: 1926574326

Shandong, ChinaShandong Renke Control Technology Co., Ltd.

US$13.00

1 Piece

Sample price:US$13.00/piece.Request sample

Product profile

Customization

Available

Installation Type

Bracket Type

Contact

Contactless

Model NO.

RS-SJ-*-5-T

Output Signal Type

RS485/Relay Output

Output Status

Normally Open

Production Process

Integration

Probe Type

Photoelectric Type

Output Form

Lights Flashing

IP Rating

IP68

Certification

Customized

Power Supply

DC10-30V

Cable Length

Plug-in Cable, Total Length 2 Meters

Operating Environment

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

Relay Load Capacity

60VDC 0.5A

Transport Package

Box

Specification

77*18mm

Trademark

Renke

Origin

Shandong, China

Production Capacity

1000 Pieces/Month

Key features

Capable of measuring various liquids, including insulating liquids.

Highly sensitive to water immersion; detects water presence with a 1mm water level.

IP68 protection rating; can be submerged in liquids for extended periods, suitable for various harsh environments.

Easy installation; comes with an L-shaped bracket supporting installation at various heights.

Low false alarm rate: Compared with traditional probe type sensors, optical water leak sensors are less susceptible to interference from humidity, dust, or condensation, educing unnecessary alarms.

Wide media compatibility: Optical water leak sensors can accurately detect a variety of liquids, including corrosive chemicals, insulating oils, and acidic or alkaline liquids.

Compact size: The sensor's small footprint allows it to be installed in confined spaces such as server cabinets, pipe interlayers, and beneath precision equipment.

Fast response time: Based on optical sensing technology, the water leak sensor responds quickly and can detect leaks and trigger alarms within a very short period.

Excellent stability: The fully sealed design minimizes the impact of environmental factors on internal electronic components, ensuring long term stability, reliability, and consistent performance.

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: ≤6.35h

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 is an optical water leak sensor?

An optical water leak sensor is a device that detects the presence of water using infrared light instead of conductive probes. It monitors changes in light reflection caused by contact with liquid and sends an alarm signal when a leak is detected.

Q:How does an optical water leak sensor work?

When light rays are emitted from the sensor probe and encounter the water surface, the light's propagation path changes, causing a change in the light signal received by the sensor. By monitoring this change, an optical water leak sensor can accurately determine the water level or whether a leak exists.

Q:How to wire an optical water leak sensor?

We offer two output options: RS485 and switch output. RS485 version wiring: Brown wire: Power positive (10~30 VDC) Black wire: Power negative Yellow wire: RS485-A Blue wire: RS485-B Switch output version wiring: Brown wire: Power positive (10~30 VDC) Black wire: Power negative Yellow wire and blue wire: Relay normally open (NO) contacts.

Q:What do the LED indicator statuses of the optical water leak sensor mean?

LED flashes once every 5 seconds: No liquid detected (dry condition) LED flashes rapidly: Liquid detected (leak condition) LED remains continuously on: Device fault or abnormal status

Q:How can I view the data?

Single-point monitoring: The sensor data can be uploaded to the user's own software system through an RS485 to USB converter for viewing and analysis. Multi-point monitoring: Multiple sensors can be connected to our environmental monitoring host, which supports up to 32 monitoring channels. The host collects and uploads all data to our free cloud platform, allowing users to view real-time data from all monitoring points in a centralized interface.