In the field of industrial automation, analog and switching are often referred to as technical terms. The output or input of a sensor is either analog or switching. Analog sensors emit continuous signals that indicate the magnitude of the measured parameter in terms of voltage, current, resistance, etc. For example, temperature sensors, pressure sensors, etc. are common analog sensors, such as pressure sensors -100kPa ~ 0, temperature sensors -40℃-125℃. Liquid level sensor 0-20m, etc. Switching quantity refers to the acquisition and output of discontinuous signals, including telecommunication acquisition and remote control output. It has two states of 1 and 0, which is the nature of switching in digital circuits, and electrically refers to the opening and closing of circuits or the opening and closing of contacts. Some of the sensors can be set to switch by analog, if not, we can connect the sensor to the PLC to set the sensor to a certain level when the PLC controls the relay switching circuit. This realizes the analog quantity collected by the sensor is converted into switching quantity. Sensor technology has a very important position in modern science and technology, known as one of the three pillars of modern information technology (sensing technology, computer technology, communications technology). Sensor technology is not only widely used in industrial automation, military defense and cosmic development, ocean exploration and other important areas of cutting-edge science and engineering, sensors are also in their own great potential to bio-engineering, health care, environmental protection, security, home appliances, network homes and other aspects of penetration. Nowadays, sensors have emerged in an endless stream and are developing day by day. For product consultation, product customization, agency, technical inquiries, quotations and any other questions, please contact Star Sensor hotline: 400-600-4496 !