Micro-sensor is the most successful and practical micro-electromechanical device, which mainly includes micro-pressure sensor and micro-acceleration sensor which generate electrical signal output by mechanical deformation of micro-diaphragm. In addition, there are micro temperature sensors, magnetic field sensors, gas sensors, etc., the area of these micro sensors is mostly less than 1 mm2.

With the further development of microelectronics processing technology, especially nanomachining technology, sensor technology will also evolve from micro sensors to nano sensors. The small size of these micro-sensors enables many new functions, facilitates high-volume and high-precision production, has a low cost per piece, and is easy to form large-scale and multifunctional arrays, which makes them ideal for automotive applications.

Automotive sensors are a general term for various sensors used in automotive display and electronic control systems. It involves many physical quantity sensors and chemical quantity sensors. These sensors either let the driver know the status of the parts of the car; Or it's used to control the state of various parts of the car.

Automotive temperature sensors are mainly used to detect engine temperature, suction gas temperature, cooling water temperature, fuel temperature and catalytic temperature. There are three main types of temperature sensors: thermistor type, wire-wound resistance type and thermocouple resistance type. These three types of sensors have their own characteristics, and their applications are slightly different. Thermistor temperature sensor has high sensitivity and good response characteristics, but poor linearity and low adaptation temperature.

Among them, the temperature measurement range of the universal type is -50℃~30℃, the accuracy is 1.5%, and the response time is 10 ms; The high temperature type is 600℃~1000℃, the accuracy is 5%, and the response time is 10ms; The wire-wound resistance temperature sensor has high precision but poor response characteristics. Thermocouple resistance temperature sensors have high accuracy and wide temperature range, but they need to be used together with amplifiers and cold end treatment. Other practical products are ferrite temperature sensors (temperature range of -40℃~120℃, accuracy of 2.0%), metal or semiconductor film air temperature sensors (temperature range of -40℃~150℃, accuracy of 2.0%, 5%, response time of about 20 ms).
Micro load cell features
◎ Maximum range: 10kg ~ 1t
◎ Stainless steel material
◎ Small size, low height, fully sealed
◎ Protection level: IP68
◎ Suitable for use in limited space
Technical parameters of micro load cell
Rated load 10kg(98N)~1t(9.8KN)
Rated output 1.0~1.5mV/V
Zero point balance ±0.2mV/V
Nonlinearity ±0.5%F.S
Lag ±0.5%F.S
Repeatability ±0.5%F.S
Input impedance 350±20Ω
Output impedance 350±3Ω
Insulation resistance ≥5000MΩ
The recommended excitation voltage is 10V
Maximum excitation voltage 15V
Temperature effect on zero point ±0.5%F.S/10℃
Temperature influence on sensitivity ±0.5%F.S/10℃
The allowable operating temperature is -20 ~ +65℃
Safety load 150%F.S
Ultimate load 200%F.S
Seal class IP68
Material Stainless steel
Cable L:500mm D: ￠3mm
Outgoing mode Red :E+, green :E-, yellow :S+, white :S-
The composition of micro load cell
The micro load cell is composed of analog sensor (resistance strain gauge) and digital conversion module. The digital module consists of highly integrated electronic circuits, made of SMT surface mount technology, mainly including amplifiers, A/D converters, microprocessors (cpus), memory, interface circuits (RS485) and digital temperature sensors.
Application of micro load cell
Micro weighing sensor is widely used in electronic price scale, platform scale, case scale, electronic belt scale, sorting scale, truck scale, dynamic track scale, large tonnage hopper scale and other devices, because it has small size, light weight, easy to install and other characteristics, especially suitable for small volume occasions.