Water meter, electricity meter, gas meter, handheld meter reading machine

For traditional mechanical watches, which are roller-type and cannot communicate, meter reading is usually carried out by taking pictures at regular intervals. The schematic diagram is as follows:

For instruments with communication interfaces, if RS485 interface, 4~20mA instruments, a special wireless collector can be used for meter reading. The schematic diagram is as follows:

For gas meters and electricity meters with infrared communication, wireless infrared meter readers are usually used for remote meter reading. The schematic diagram is as follows: