E3T-ST12R

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Optical sensors are a class of components or instruments used to detect electromagnetic radiation that falls within the visible, infrared, or ultraviolet spectra. They are most commonly used in industrial and consumer applications to measure electrical and optical properties of a signal or light source, including the presence of light, illumination intensity, stress on a material, the distance between two objects, or the exact location of an object. Photoelectric sensors are the most common type of optical sensor. They are used to detect the presence of a liquid, object, or surface, and they detect variations in light levels.

The E3T-ST12R is an example of an optical sensor. It is a reflective photoelectric sensor that is typically used in industrial applications. It is designed to detect the presence or absence of objects, regardless of color or surface finish. It is often used in positioning systems, machine vision, and in packaging, transportation, and electronic assembly systems.

The E3T-ST12R works using an infrared LED light source. When an object passes between the light source and the receiver, the light is reflected back towards the receiver and the output signal is triggered. The unit can be used to detect objects with a minimum 0.4mm diameter and a maximum reflectivity of 20%. It has a sensing distance of 3mm to 200mm, depending on the object it will be used for. The unit is designed to be highly resistant to dust, water, and oils. It is rated to withstand up to IP67, meaning it is dust tight and protected from short-term immersion up to 1m depth.

The E3T-ST12R comes in two versions, either diffuse reflective or converter reflective. The diffuse reflective model uses the principle of diffused reflection where the incident light is scattered in many directions with roughly equal intensity. The converter reflective model uses a reflector to concentrate light in a single direction. This allows the sensor to detect objects with minimal reflectivity.

The E3T-ST12R is easy to set up and use. It can be directly connected to a PLC, AC or DC controllers, or the NPN open collector outputs can be switched directly to the circuits. It also has a built-in manual switchable output, which allows the user to manually switch the output on and off. It also has a selectable response time setting, which allows for improved performance in specific applications. This setting can be used to help reduce false triggers caused by ambient lighting or vibrational conditions.

The E3T-ST12R is a versatile and reliable optical sensor that can be used in a variety of applications. Its wide sensing range and high degree of resistance against dust, water, and oils make it a great choice for industrial and commercial applications. The adjustable response time and easy setup makes it convenient to use, and the two available versions provides flexibility for users to choose the best one for their application.

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