Germany 4H JENA sensor 4H JENA model 4H JENA price

4H JENA sensor is a device that converts optical signals into electrical signals. Its working principle is based on the photoelectric effect. The photoelectric effect refers to the phenomenon where electrons in a material absorb the energy of photons when light shines on certain substances, resulting in corresponding electrical effects. Based on the different phenomena of the photoelectric effect, it is divided into three categories: external photoelectric effect, internal photoelectric effect, and photovoltaic effect. Photoelectric devices include phototubes, photomultiplier tubes, photoresistors, photodiodes, phototransistors, and photocells. The performance and characteristic curves of photoelectric devices are analyzed.

4H JENA sensor principle

Optical measurement and control systems manufactured based on different principles of luminous flux acting on photoelectric elements are diverse. According to the nature of the output of the photoelectric element (optical measurement and control system), they can be divided into two categories: analog photoelectric sensors and pulse (switching) photoelectric sensors. Analog photoelectric sensors convert the measured quantity into a continuously changing photocurrent, exhibiting a single-valued relationship with the measured quantity. Analog photoelectric sensors can be divided into three major types based on the method of measuring the target object: transmission (absorption) type, diffuse reflection type, and beam interruption (light blocking) type. The transmission type refers to placing the measured object in the optical path, where the light energy emitted by a constant light source passes through the object, and after partial absorption, the transmitted light is projected onto the photoelectric element. The diffuse reflection type refers to the light emitted by a constant light source being projected onto the measured object, reflecting off its surface, and then projecting onto the photoelectric element. The beam interruption type refers to the situation where the measured object blocks part of the luminous flux from the light source, causing a change in the luminous flux projected onto the photoelectric element; the degree of change depends on the position of the measured object in the optical path.

4H JENA sensor features

1) Long detection distance: If a detection distance of more than 10m is maintained in through-beam configurations, long-distance detection impossible with other methods (magnetic, ultrasonic, etc.) can be achieved. 2) Few restrictions on detected objects: Since the detection principle relies on light blocking and reflection caused by the object, unlike proximity sensors that limit detection to metals, it can detect almost all objects such as glass, plastic, wood, and liquids. 3) Short response time: Light itself travels at high speed, and the sensor circuit consists of electronic components, excluding mechanical operating time, resulting in a very short response time. 4) High resolution: High resolution can be achieved by concentrating the emitted light beam into a small spot using advanced design techniques, or by constructing special receiving optical systems. Detection of tiny objects and high-precision position detection are also possible. 5) Non-contact detection: Detection can be performed without mechanical contact with the object, preventing damage to both the object and the sensor, allowing for long-term use. 6) Color discrimination: The reflectance and absorptance of light formed by the detected object vary depending on the wavelength of the incident light and the color of the object. This property allows for color detection of the object. 7) Easy adjustment: In types emitting visible light, the beam is visible to the eye, facilitating adjustment of the object's position.

4H JENA sensor applications

Photoelectric sensors using photoelectric elements as sensitive components are diverse and widely used. They can be divided into two categories based on the nature of the output: (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, ellipticity, and surface roughness of machined 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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