The food drying machine is suitable for industrial and mining enterprises, medical colleges and scientific research institutions to dry and heat items under vacuum. Its temperature controller adopts touch keys, digital LED display, PID intelligent control instrument, and PT100 platinum resistance temperature measurement sensor. Storage, heating, testing and drying are carried out in an environment without oxygen or full of inert gas, so food will not oxidize. The fruit washing machine is a machine for washing fruit. http://www.shjumpmachine.com/fruit-processing-equipment/food-drying-machine/

he elevator door operator is the assembly that ensures the elevator door opening and elevator door closing mechanism work. The electrical part includes the elevator door motor, motor speed control device, position switch or encoder; the mechanical part includes the door rail, hanging board, door leaf linkage, etc. Elevator Door Sensor is an elevator device that detects a passenger or an object on the doorway which prevents the doors from closing (usually installed for accessibility). http://www.sanjinelevator.com/elevator-door-operator/

Rotation sensor is a type of sensor used for measuring rotary displacement. They can measure these rotary movements in either clockwise or anticlockwise directions. Rotation sensors are used in a variety of environments and applications to ensure the components within the device are working correctly. They are available in different technologies and each one has their own way of working with different advantages. http://www.wintopok.com/sensor/rotation-sensor/

Pressure transmitters are routinely used in a wide range of industrial sectors. Offshore drilling and oil exploration commonly utilize pressure sensors to measure differential values between the interior and exterior of pressure sensitive equipment. Distinct parameters must be maintained to ensure drilling and acquisition processes are carried out to an ethical and efficient standard. This is also true of on-shore petrochemical, gas, and chemical facilities. http://www.enbbonsensor.com/pressure-sensor/

The intake air pressure sensor is connected to the intake manifold by a vacuum tube. With the different speed loads of the engine, it senses the vacuum change in the intake manifold, and then converts the change of the internal resistance of the sensor is converted into a voltage signal for the ECU to correct the fuel injection amount and ignition timing angle. In the EFI engine, the intake pressure sensor is used to detect the intake air amount, which is called D-type injection system (speed density type). http://www.keditesensor.com/intake-air-pressure-sensor/

Pressure measurement is the analysis of an applied force by a fluid (liquid or gas) on a surface. Pressure is typically measured in units of force per unit of surface area. Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure and display pressure in an integral unit are called pressure meters or pressure gauges or vacuum gauges. A manometer is a good example, as it uses the surface area and weight of a column of liquid to both measure and indicate pressure. http://www.brgsensor.com/pressure-measurement/

Thermistors are a type of semiconductor, meaning they have greater resistance than conducting materials, but lower resistance than insulating materials. The relationship between a thermistor’s temperature and its resistance is highly dependent upon the materials from which it’s composed. The manufacturer typically determines this property with a high degree of accuracy, as this is the primary characteristic of interest to thermistor buyers. http://www.jingpusensor.com/thermistor/

A control valve receives the information from various sensors and transmitters in a control loop and processes that data to manage the control of the fluid parameter. The following figure shows a typical control loop for a control valve. There are many different types pf control valves, such as straight stroke control valve, single seat control valve, cage guided control valve, micro flow control valve, cryogenic control valve, bellow seal control valve, fluorine lined control valve, high pressure control valve, angle stroke control valve, ball control valve, etc. http://www.lozosevalve.com/straight-stroke-control-valve/cryogenic-control-valve/

It then interprets it in itself and transfers it to other devices that it commands in the field. Collection and transfer of information can be done analog or digitally. For example, data from the sensor can be transferred to a valve. PLCs should be preferred if the system to be controlled is larger and requires more operations. It can also be devided into many types like Ewelink Smart Relay, Tuya Smart Relay and so on for different models. http://www.hochiot.com/smart-relay/tuya-smart-relay/

Ultrasonic Water Meter(Bulk Water Meters) is an innovative flow meter with a static flow sensor based on the ultrasonic measuring principle. Ultrasonic Water Meter utilizes ultrasonic measuring methodology and microprocessor technology. All calculation and flow measuring circuits are designed on one single board, thus offering exceptional accuracy and reliabilityhttp://www.shmeter.com/ultrasonic-water-meter/ultrasonic-bulk-water-meter/