The optoelectronic level switch is a versatile device used for monitoring the level of liquids in various applications. Whether in machine tools, hydraulics, plant construction, or water technology, this advanced sensor is designed to detect the presence or absence of fluid with high accuracy. With an impressive accuracy of ±2 mm, the optoelectronic level switch ensures precise and reliable fluid detection.
Applications of Optoelectronic Level Switch
Optoelectronic level switches are widely used for level detection in liquids across various industries. They are suitable for applications in industrial sectors such as chemical, petrochemical, natural gas, offshore, shipbuilding, machine building, power generation, water treatment, and environmental engineering.
In the chemical industry, these level switches are utilized for level measurement in storage tanks, reaction vessels, and pipelines. In the petrochemical industry, they are employed for liquid level detection in tanks, silos, and vessels. These switches play a crucial role in power plants for applications such as boiler level control, condensate tanks, and feedwater tanks. Moreover, in the food and beverage industry, optoelectronic level switches are used for liquid level monitoring in tanks, containers, and production lines. The pharmaceutical industry also benefits from their usage for tasks like liquid level measurement in storage tanks and processing units.
One of the key advantages of optoelectronic level switches is their ability to handle different types of liquids, including oils, water, distilled water, and aqueous media. The switches are not impacted by the physical characteristics of the liquid, such as refractive index, color, density, dielectric constant, and conductivity. This makes them highly compatible with a wide range of liquids found in various industrial processes.
Overall, optoelectronic level switches are a versatile solution for level detection in industrial applications, the food and beverage industry, and the pharmaceutical industry, offering accurate and reliable fluid measurement.
Types of Optoelectronic Sensors
WIKA offers a range of optoelectronic sensors for different applications, including the model OLS-C20 optoelectronic level switch. This particular switch is suitable for high-pressure designs and features a compact size, making it ideal for space-constrained installations.
In addition to the OLS-C20, WIKA also provides specialized optoelectronic sensors tailored to specific industries such as refrigeration technology and shipbuilding. For instance, the model OLS-C51 level switch is designed as an explosion-protected version, making it suitable for use in extreme environments where safety is paramount.
All WIKA optoelectronic sensors operate using a glass prism and an LED light source. The light emitted from the LED is directed into the prism, creating a beam. When the liquid comes into contact with the tip of the sensor, the light is refracted and no longer reaches the receiver. This change in light signals the sensor to trigger a switching operation, providing accurate and reliable fluid detection.
How Optoelectronic Sensors Work
The optoelectronic switch consists of three main components: a glass prism, an LED light source, and a phototransistor. When the optoelectronic switch is in its normal state, the light from the LED is directed into the glass prism. As long as the tip of the sensor is not in contact with the liquid, the light is reflected within the prism and reaches the receiver.
However, when the liquid rises and comes into contact with the tip of the sensor, the light is refracted by the prism and enters the liquid. This change in light, either weakening or interrupting the light beam, is detected by the electronics of the switch. It triggers a switching operation, indicating that the liquid level has reached a certain point.
Conversely, when the liquid level drops and the tip of the sensor is no longer covered by liquid, the light can reach the receiver again. This reversal in the amount of received light signals that the liquid level has fallen below the predetermined point, and the switching operation is reversed.
Optoelectronic sensors rely on the principle of light refraction to detect the presence or absence of liquid. The refraction occurs when light passes from one medium, such as air, into another medium, such as a liquid. In this case, the glass prism acts as the interface between the air and the liquid. When the light beam encounters the liquid, its path is altered, resulting in a change in the amount of light that reaches the receiver.
Optoelectronic sensors are widely used for level monitoring in various industries. They offer accurate and reliable fluid detection, making them suitable for applications where precise level control is essential.
Level Measurement with Optoelectronic Level Switch
The model OLS optoelectronic level switches are designed for the detection of limit levels in liquids. These switches are not influenced by physical characteristics such as refractive index, color, density, dielectric constant, and conductivity, making them suitable for a wide range of applications.
The switches consist of an infrared LED and a phototransistor and work by using a glass tip that reflects light when not in contact with the liquid. When the liquid level rises and wets approximately 2/3 of the glass tip, the light beam is interrupted, and only a small portion reaches the receiver.
This change in light is evaluated by the electronics and triggers a switching operation. The model OLS optoelectronic level switch is available in an explosion-protected version for use in hazardous environments.
Features of the model OLS optoelectronic level switch:
- Accurate detection of limit levels in liquids
- Insensitive to physical characteristics of the liquid
- Infrared LED and phototransistor technology
- Glass tip reflects light when not in contact with the liquid
- Light beam interruption triggers switching operation
- Available in explosion-protected version for hazardous environments
When used together with the model OSA-S switching amplifier, the sensor can be used for overflow control. The optoelectronic level switch model OLS-S offers reliable level measurement, while the high-pressure model OLS-H is designed for applications with elevated pressure requirements.
Applications of Optoelectronic Level Switch
Optoelectronic level switches are widely used in various industries and processes for accurate and reliable level measurement of different liquids. These switches find their applications in the chemical industry, petrochemical industry, power plants, and water treatment facilities.
Chemical Industry
In the chemical industry, optoelectronic level switches are employed for precise level measurement in storage tanks, reaction vessels, and pipelines. These switches provide accurate monitoring and control of liquid levels, ensuring efficient and safe chemical processes.
Petrochemical Industry
The petrochemical industry utilizes optoelectronic level switches for the detection of liquid levels in tanks, silos, and vessels. By accurately monitoring the levels of various liquids such as fuels, oils, and chemicals, these switches help ensure proper storage and facilitate smooth operations within the industry.
Power Plants
In power plants, optoelectronic level switches play a crucial role in applications like boiler level control, condensate tanks, and feedwater tanks. These switches provide accurate level measurement, aiding in the efficient and safe operation of power generation systems.
Water Treatment
Optoelectronic level switches are widely used in water treatment facilities for level monitoring in water reservoirs, basins, and treatment plants. These switches ensure precise control over water levels, enabling effective water treatment processes and distribution.
Designed to withstand harsh environments, optoelectronic level switches offer reliable and accurate level measurement solutions across diverse industrial applications. Their compatibility with different liquids makes them versatile and suitable for a wide range of processes.
Optoelectronic Level Switch Specifications
Optoelectronic level switches come in a variety of configurations and specifications to meet specific application requirements. These switches are designed to withstand harsh operating conditions and offer high measurement accuracy for precise fluid detection.
The temperature range for optoelectronic level switches can vary from -269°C to +400°C, allowing them to be used in a wide range of temperature environments. Whether it’s extreme cold or high heat, these switches can reliably monitor fluid levels.
For pressure-sensitive applications, optoelectronic level switches are available in versions that can handle pressure ranges from vacuum to 500 bar. This makes them versatile options for various industrial settings and demanding processes.
When it comes to measurement accuracy, optoelectronic level switches deliver exceptional results. These switches offer ±0.5 mm measuring accuracy, ensuring precise and reliable level detection. Additionally, they provide ±0.1 mm repeat accuracy, allowing for consistent and repeatable measurements even in dynamic environments.
Optoelectronic level switches are available in explosion-protected versions, making them safe to use in hazardous environments. These versions are designed to meet stringent safety standards and ensure reliable operation even in potentially volatile conditions.
With different models and versions available, optoelectronic level switches can be tailored to suit specific application requirements. Whether it’s for industrial processes, water treatment plants, or even in the chemical and petrochemical industries, there is an optoelectronic level switch available to meet the needs of various applications.
Optoelectronic Level Switch Models and Accessories
WIKA offers a range of optoelectronic level switch models to cater to diverse application needs. These include the standard version (OLS-S), the high-pressure version (OLS-H), and the explosion-protected version (OLS-C51). Each model is designed to provide reliable and accurate level detection for different liquid media.
To enhance functionality and control, the optoelectronic level switches can be paired with the model OSA-S switching amplifier. This enables users to optimize their level monitoring system and achieve precise fluid detection.
In addition to the level switches and switching amplifier, WIKA also offers various accessories to customize installations and optimize performance. These accessories include light guides, sensor housings, and mounting options. With the right combination of accessories, users can ensure seamless integration and reliable operation of their optoelectronic level switch system.
To help customers make informed decisions, WIKA provides comprehensive data sheets for each optoelectronic level switch model. These data sheets contain detailed specifications, certifications, approvals, and ordering information. This enables customers to select the most suitable model and accessories for their specific application requirements.
Patrick Reeves is an electrical engineer and the visionary behind Datasheet Site, a comprehensive online repository dedicated to providing detailed datasheets and guides for a vast array of optoelectronics and semiconductors. With over two decades of experience in the electronics manufacturing industry, Patrick has an unparalleled depth of knowledge in electronic design, component specification, and the latest advancements in optoelectronics technology.