Optical Level Switch

Overview of Optical Level Switch

The Optical Level Switch is a compact and reliable liquid level detection device that operates on the principles of light refraction and reflection. When the sensor is immersed in liquid, a liquid-to-switch interface is formed, and when the liquid recedes, an air-to-switch interface appears. The internal phototransistor detects the difference in reflected light intensity, generating precise ON/OFF switching signals. With no moving parts, it is maintenance-free, highly durable, and ideal for high-accuracy level monitoring in tanks, pipelines, and vessels across industries such as water treatment, chemical, food processing, and petrochemical applications.

Features of Optical Level Switch

• High-Pressure Tolerance – Prism fused to metal housing, withstands pressures above 60 bar.

• Split-Type Design – Suitable for pressure vessels, HVAC, hydraulic equipment, and other industrial systems.

• Precise Level Detection – Accurate upper/lower limit point detection and multi-point monitoring with reliable ON/OFF signals.

• Maintenance-Free – No moving parts, long service life, stable performance, and low operational cost.

• Durable Materials – Food-grade glass probe with 316 stainless steel housing, resistant to corrosion and suitable for hygienic environments.

• Wide Operating Conditions – Temperature range from -40°C to 120°C, pressure ≤6 MPa.

• Reliable Electrical Performance – 24VDC power supply with open-collector output (NPN-C), compliant with EMC standards.

Applications of Optical Level Switch

• Water Treatment – Level monitoring in tanks, reservoirs, and treatment systems.

• Paper & Printing Industry – Reliable detection of liquids in processing lines.

• Power Generation & Distribution – High/low level alarms for coolant or lubricating fluids.

• Petrochemical & Chemical Industry – Monitoring of clean, low-viscosity liquids in tanks and reactors.

• Food & Beverage – Hygienic monitoring of liquids in production and storage tanks.

• Pharmaceuticals – Accurate detection in liquid handling and dosing systems.

• Dye Production – Point-level control in storage and mixing vessels.

• Railway & Heavy Machinery – Monitoring critical fluid levels in hydraulic and cooling systems.

Price of Optical Level Switch

The price of the Optical Level Switch varies depending on material, type, and customized specifications.
For the latest quotation suitable for your application, please contact ZINACA Instruments for an updated offer.

Optical Level Switch OEM Service

ZINACA Instruments is a professional industrial instrumentation manufacturer, specializing in temperature, pressure, flow, and level measurement devices.
We provide customized OEM services to meet your technical requirements and process conditions, delivering reliable and high-quality Optical Level Switch solutions.
If you are looking for Optical Level Switch OEM Service, please contact us to discuss your needs.

Optical Level Switch Manufacturer

As a leading Optical Level Switch Manufacturer, ZINACA Instruments produces level switches with high sensitivity, durable construction, and long service life, ensuring stable and precise level measurement for industrial applications worldwide.

Technical Specifications