Displacement sensor, also known as linear sensor, is a linear device belonging to metal induction. The function of the sensor is to convert various measured physical quantities into electricity. In the production process, the measurement of displacement is generally divided into measuring the physical size and mechanical displacement. According to the different forms of the measured variable, the displacement sensor can be divided into two types: analog and digital. The analog type can be divided into two types: physical property type and structural type. Commonly used displacement sensors are mostly analog structures, including potentiometer-type displacement sensors, inductive displacement sensors, self-aligning machines, capacitive displacement sensors, eddy current displacement sensors, Hall-type displacement sensors, etc. An important advantage of the digital displacement sensor is that it is convenient to send the signal directly into the computer system. This kind of sensor is developing rapidly, and its application is increasingly widespread. Magnetic Scale Linear Encoder,Magnetic Scale Encoder,Encoder Software,Encoder Meaning Changchun Guangxing Sensing Technology Co.LTD , https://www.gx-encoder.com
It is understood that for non-ENERGY STAR lighting products, the DLC certified product catalog is the practical guideline for measuring high quality, energy efficient lighting products. ETL is an important certification for product safety. Under special circumstances, ETL can issue certificates first and then conduct factory inspections to save valuable time for product export. 
Stoff LED high bay light and Tiangong LED film light obtained American certification
Recently, after Ford Optoelectronics received the US Energy Star and UL certification, the LED high-bay lights and the Tiangong LED film lights both passed the US DLC (Design Lights Consortium) performance certification and the US ETL (Electrical Testing Laboratories). Safety certification, the light efficiency, longevity and light distribution of these two products are leading in the certified products.