SFL125 switch Germany Hager model SFL125 price

The SFL125 switch, also known as a torque switch, torsion switch, torque switch, or torque meter, is divided into two main categories: dynamic and static. Among these, dynamic torque switches are also referred to as torque switches, torque-speed switches, non-contact torque switches, and rotary torque switches. Torque switches detect the perception of torsional torque on various rotating or non-rotating mechanical components. They convert the physical changes in torque into precise electrical signals. Torque switches can be applied in the manufacture of viscometers and electric (pneumatic, hydraulic) torque wrenches, offering advantages such as high precision, fast frequency response, good reliability, and long service life.

SFL125 switch principle

Optical measurement and control systems vary widely based on the different principles of how luminous flux acts on photoelectric elements. Based on the nature of the output from the photoelectric element (optical measurement and control system), they can be divided into two categories: analog photoelectric switches and pulse (switching) photoelectric switches. Analog photoelectric switches convert the measured quantity into a continuously changing photocurrent, maintaining a single-valued relationship with the measured quantity. Analog photoelectric switches can be classified into three types based on the method of measuring the target object: transmission (absorption) type, diffuse reflection type, and beam interruption (blocking) type. The transmission type refers to placing the measured object in the light path, where light energy from a constant source passes through the object, is partially absorbed, and the transmitted light projects onto the photoelectric element. The diffuse reflection type refers to light from a constant source projecting onto the measured object, reflecting off its surface, and then projecting onto the photoelectric element. The beam interruption type refers to the scenario where the object blocks part of the luminous flux from the source, changing the amount of light reaching the photoelectric element; the degree of change depends on the object's position in the light path.

SFL125 switch features

1) Long detection distance: By maintaining a detection distance of 10m or more in through-beam configurations, it achieves long-range detection that other methods (magnetic, ultrasonic, etc.) cannot. 2) Few restrictions on detected objects: Since the detection principle relies on light blocking and reflection caused by the object, unlike proximity switches that limit detection to metals, it can detect almost all objects including glass, plastic, wood, and liquids. 3) Short response time: Light itself is high-speed, and the switch circuitry consists entirely of electronic components, eliminating mechanical operating time, resulting in very short response times. 4) High resolution: Advanced design techniques concentrate the emitted light beam into a small spot, or special receiving optical systems are constructed to achieve high resolution. This allows for the detection of tiny objects and high-precision position detection. 5) Non-contact detection possible: Detection is achieved without mechanical contact with the object, preventing damage to both the object and the switch, thus enabling long-term use. 6) Color discrimination possible: The reflectance and absorptance of light formed by the detected object vary depending on the wavelength of the emitted light and the color of the object. Utilizing this property, the color of the detected object can be determined. 7) Easy adjustment: In types emitting visible light, the beam is visible to the eye, facilitating easy adjustment of the detected object's position.

SFL125 switch applications

Photoelectric switches using photoelectric elements as sensitive components are diverse and widely used. Based on the nature of the output, they can be divided into two categories: (1) Photoelectric measuring instruments that convert the measured quantity into a continuously changing photocurrent, used to measure physical quantities such as light intensity, object temperature, light transmittance, displacement, and surface condition. Examples include lux meters for measuring light intensity, photoelectric pyrometers, photoelectric colorimeters and turbidimeters, photoelectric fire alarms, and automatic inspection devices and instruments for checking the diameter, length, ovality, and surface roughness of processed parts, all of which use photoelectric elements as sensitive components. Semiconductor photoelectric elements are not only widely used in civil industrial fields but also hold an important position in military applications. For example, lead sulfide photoresistors can be used to make infrared night vision devices, infrared cameras, and infrared navigation systems; (2) Devices that convert the measured quantity into a continuously changing photocurrent. Various photoelectric automatic devices are made using the characteristic of photoelectric elements to output "present" or "absent" electrical signals when exposed to light or no light. Photoelectric elements serve as switching photoelectric conversion components. Examples include photoelectric input devices for computers, switching temperature control devices, and digital photoelectric tachometers for speed measurement.

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