The principle, advantages and disadvantages of American SMD photoelectric liquid level switch
The photoelectric level switch is a switching device that uses a photoelectric sensor to control the switch to control the liquid level. Today, I will briefly introduce the knowledge about how the US SMD photoelectric level switch works.
The working principle of photoelectric liquid level switch
The photoelectric level switch consists mainly of two main components: an infrared LED and a phototransistor that are accurately positioned at the bottom of the sensor tip. The working principle is mainly to use an photoelectric liquid level switch sensor to include an infrared light emitting diode and an optical receiver. The light emitted by the LED is directed into the prism at the top of the sensor. When the tip is in the air, the infrared light is internally reflected around the tip of the phototransistor, providing a strong optical coupling between the two. When the sensor tip is immersed in the liquid, the infrared light escapes from the tip, causing the amount of light of the phototransistor to decrease, thereby causing the output state to change. As shown below:
Optoelectronic level switch advantages and disadvantages
The main advantages of the photoelectric liquid level switch are small size, lack of parts and low cost. However, in high pressure environments, point detection is very accurate. But they are not very useful for continuous level measurements. In addition, the photoelectric level switch is not suitable for use in a top-mounted environment, because when the photoelectric level switch is installed at the top, the precision photoelectric level switch may be adversely affected by moisture condensation.
Through the brief introduction of the above US SMD photoelectric liquid level switch, it is considered that the project inspection network can provide two photoelectric liquid level switches from SMD fluid control, for example:
First, the United States SMD Fluid Switch stainless steel photoelectric level sensor OS150
US SMD Fluid Switch Stainless Steel Optoelectronic Level Sensor OS150 Stainless Steel Opto Liquid Level Sensor is designed for high pressure water and level sensing and can be measured with 1/16" accuracy. Built-in optical electronic components provide switch output level sensor, Perceives the presence of liquids at temperatures up to 100 ° C. The sensor is ideal for corrosion-resistant liquid level sensing or pressure vessels, refrigeration and hydraulic applications. Glass-to-metal seals allow high pressure level sensing of 2500 PSI and can pass 1/2" NPT port installation.
US SMD Fluid Switch stainless steel photoelectric level sensor OS150 features:
Prism welding provides higher pressure on the housing
Excellent value for money
Ideal for corrosive liquids
US SMD Fluid Switch Stainless Steel Optoelectronic Level Sensor OS150 Application:
Hydraulic oil and lubricant monitoring
Key level monitoring for industrial OEM applications such as machine tools, compressors, and refrigerants
Ideal for corrosive liquids: acids, solvents, electrolyzed water
Medical equipment; anesthesia, organization
Second, the United States SMD Fluid Switch micro plastic photoelectric level sensor - OS950
US SMD Fluid Switch Micro Plastic Photoelectric Level Sensor - The OS950 sensor features a polysulfone polymer housing and no moving parts. The plastic level switch is ideal for single point liquid level monitoring in medical diagnostic equipment, dialysis systems, sterilizers and other OEM industrial and medical applications. Built-in optoelectronics provide a switch output level sensor that detects the presence or absence of fluid at temperatures up to 125 ° C and pressures up to 250 PSIG. The sensors provided by the work network can be custom designed or modified to meet the specific application requirements of the customer.
US SMD Fluid Switch Micro Plastic Photoelectric Liquid Level Sensor OS950 Features:
TPE overmolded electronic inserts
Rugged design for harsh environments
US SMD Fluid Switch Micro Plastic Photoelectric Liquid Level Sensor OS950 Application:
Coolant tank monitoring and warning
Medical diagnostics, sterilizers, lotions and dialysis equipment
Machine tool, generator set, OHV lubricant low level alarm
Low level alarm in hydraulic tank
Plastic overflow bottle, plastic radiator