Optical Fluid Liquid Level Switch

The Fineherc optical fluid level switch is designed for precise and reliable point-level detection in industrial liquid monitoring systems. Featuring advanced infrared optical sensing technology, a robust stainless steel housing, and a chemical-resistant polysulfone sensing tip, this sensor delivers dependable performance in demanding operating environments. With a wide operating temperature range, high-pressure capability, and flexible electrical output configurations, it supports diverse liquid detection requirements. Multiple mounting thread options and connection styles simplify system integration. Fineherc also provides OEM and ODM customization services, helping equipment manufacturers and industrial customers develop tailored liquid level sensing solutions for their specific applications and production needs.

The optical fluid level switch operates using infrared light transmission and reflection. An infrared LED emits light toward the sensor tip, while an integrated phototransistor detects the returning light.

Dry State: When the sensing tip is exposed to air, the optical coupling allows infrared light to reach the phototransistor, establishing the corresponding output state.

Wet State: When liquid contacts the sensing tip, the change in the optical interface alters the amount of light received by the phototransistor.

Signal Switching: The sensor's internal electronics process this optical change and switch the electrical output according to the selected output logic.

This solid-state sensing method enables reliable point-level detection without floats or other mechanical moving parts. The output signal can be integrated into compatible control systems, alarms, pumps, and automated equipment to support liquid level monitoring and control.

The optical fluid level switch is suitable for a wide range of industrial and commercial liquid monitoring applications.

Industrial Automation: Detects liquid presence in automated machinery, fluid handling systems, and process control equipment.

Chemical Processing: Supports liquid level monitoring in compatible chemical tanks and fluid systems. Verify material compatibility with the specific medium.

Water Treatment: Helps monitor liquid levels in water treatment equipment, storage tanks, and fluid management systems.

Leak Detection and Prevention: Detects the presence or absence of liquid at a designated monitoring point to support leak monitoring and equipment protection.

Oil and Fuel Systems: Supports point-level detection in compatible oil storage and fluid handling equipment.

Pump and Fluid Control Systems: Provides switching signals for compatible control circuits used in liquid supply and equipment protection.

OEM Equipment Manufacturing: Integrates into customized machinery, industrial instruments, and fluid management products requiring compact, reliable point-level sensing.

Proper installation helps ensure reliable detection and safe operation.

Step 1: Confirm the Installation Requirements

Check the liquid's chemical compatibility, operating temperature, maximum system pressure, mounting thread, supply voltage, and required output logic.

Step 2: Select the Mounting Position

Choose the required detection point based on the tank or equipment design. Ensure that the sensing tip can contact the target liquid when the level reaches the intended switching point.

Step 3: Install the Sensor

Use the appropriate mounting thread for the equipment interface. Ensure that the sensor is securely installed and that the sealing arrangement is compatible with the application and operating pressure.

Step 4: Connect the Electrical Interface

Connect the supply, output, and ground according to the wiring diagram for the selected configuration. Verify the output type and logic before connecting the sensor to a PLC, alarm, or other control circuit.

Step 5: Test the Sensor

Apply the specified supply voltage and test the sensor under dry and wet conditions. Confirm that the output switches as expected and that the connected control equipment responds correctly.

Step 6: Perform Final Inspection

Check for leakage, loose connections, incorrect wiring, and unstable output. Do not short the output to the supply voltage or ground, as this may permanently damage the sensor.

1. Professional OEM & ODM Manufacturing

Fineherc supports OEM branding and ODM product development, helping customers adapt products to their own brands, equipment structures, and market requirements.

2. Flexible Customization Services

Customization options may include logos, packaging, colors, materials, electrical interfaces, communication protocols, and signal outputs, depending on project feasibility.

3. Diverse Product Portfolio

Fineherc offers a range of liquid-level sensing, flow-sensing, leak-detection, and smart IoT products, providing opportunities for customers to source related sensing solutions from one manufacturer.

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