Advantages and disadvantages of analog sensors and digital sensors

Advantages and disadvantages of analog sensors and digital sensors

　 　Analog sensorDefinition: A sensor whose output signal is an analog quantity.

　 　Digital sensorDefinition: A sensor whose output signal is a digital quantity (or digital encoding).

　 Analog sensorAdvantages:

Simple installation and debugging, strong universality, low cost, occupying the majority of industrial applications in the market.

　 　
　 Analog sensorDisadvantages:

Analog output sensors, analog sensors with mV level signals that are too small, are susceptible to radio frequency interference and electromagnetic interference. Moreover, due to the influence of cable resistance, there may be losses during transmission, resulting in a shorter signal transmission distance. Simulated weighing cheating is extremely easy and difficult to control.

　 　Digital sensorAdvantages:

The digital sensor outputs digital signals, which not only have a level 100 times higher than the analog type and are not easily disturbed, but also are transmitted according to the Bifbus field bus communication protocol. The communication speed is ten times that of ordinary RS485, and it is high-speed and has communication error correction ability, ensuring fast and reliable data. Due to the confidentiality of the agreement, on-site cheating is not possible. The digital weighing sensor has a microprocessor inside, which can diagnose itself. Each sensor has its own address, and the instrument can monitor the output of each sensor online and perform intelligent processing. This not only greatly improves the reliability of the weighing system, but also easily solves some requirements that are difficult to achieve by simulating sensors, such as large tare weight, small scale, and bias detection. In addition, with its unique high-precision high-speed A/D conversion technology, comprehensive sensor digital compensation technology, and remote high-speed explosion-proof communication capabilities, the performance has exceeded the limits of analog sensors and reached the accuracy of OIML C6.

　 　Digital sensorDisadvantages: High usage cost, confidentiality of communication protocols, low product selectivity, and cumbersome installation and debugging.