Electronic forklift scales primarily consist of core hardware components such as the chassis frame, load cells, a junction box, and an on-board display unit. Depending on the specific technical design, sensor types and installation locations may vary, and the system can connect to various peripheral devices to provide extended functionality.
Typically, two pressure sensors (hydraulic type) are used; they are installed on the inlet and return hydraulic lines of the lift cylinder to calculate weight by measuring pressure fluctuations during the lifting process. Specific models include thin-film pressure sensors (e.g., PPM-216A) and sensors with digital signal processing (e.g., PPM-241A), which measure the loader's hydraulic pressure and convert it into a weight signal. Tension sensors (chain type) are installed at the end of the forklift chain or at the tensioning rod, performing weighing by capturing the tension generated in the chain when lifting a load. Piezoresistive load cells-usually installed in pairs-detect outward pulling forces at the top of the forks, inward pressure at the bottom, and vertical downward forces, converting these combined pressure signals into electrical signals.
The junction box is typically a five-port unit that aggregates signals from multiple sensors and transmits them to the on-board display unit. The display unit features a built-in central processor that receives sensor signals, performs calculations, and displays weight data; it supports functions such as zeroing, taring, accumulation, and data storage. Optional peripherals include a large wireless outdoor display for remote viewing (with a transmission range of up to 200 meters), a thermal printer for printing weight tickets, and a GPRS module that enables wireless data transmission to mobile apps or computers.