The sensor is used to determine the mass: the gravity exerted by the sample is converted into an electrical signal by the weighing sensor. Therefore, the load cell is a component of the electronic scale.

A widely used technology is based on the strain gauge technology: the analog weighing sensor consists of a measuring element (so-called spring body) made of steel or aluminum, on which the strain gauge (Wheatstone bridge) is installed. Each electronic scale has an integrated load cell to ensure that the weight can be measured.

Strain gauge weighing sensors are widely used, but there are other weighing technologies, such as electromagnetic force compensation technology EMFC, whose mass determination is completely carried out without friction loss. Usually, load cells are installed in factories, such as filling plants, weighing tanks, determining the filling amount, etc.

Sensor wiring has always been one of the most consulted questions in the customer procurement process, many customers do not know how to connect the sensor, in fact, the wiring methods of various sensors are basically the same, pressure sensors generally have two wire system, three wire system, four wire system, and some five wire system.
Pressure sensor two-wire system is relatively simple, general customers know how to wire, a wire is connected to the positive power supply, the other line is the signal line through the instrument connected to the negative power supply, this is the simplest, the pressure sensor three-wire system is on the basis of the two-wire system plus a line, the line is directly connected to the negative power supply, more trouble than the two-wire system. The four-wire pressure sensor is definitely two power inputs, and the other two are signal outputs. Four-wire system is mostly voltage output rather than 4~20mA output, 4~20mA called pressure transmitter, most made of two-wire system. Some of the signal output of the pressure sensor is not amplified, and the full-scale output is only tens of millivolts, while some pressure sensors have an amplifier circuit inside, and the full-scale output is 0~2V. As for how to receive the display instrument, it depends on how large the range of the instrument is, if there is a gear that is compatible with the output signal, it can be measured directly, otherwise it is necessary to add a signal adjustment circuit. The five-wire pressure sensor is not much different from the four-wire system, and the five-wire sensor on the market is relatively few