Water meter, electricity meter, gas meter, hand-held meter reader

For the traditional mechanical watch, it is roller-type, so it can't communicate. Usually, the meter reading is done by taking pictures regularly. The schematic diagram is as follows:

For instruments with communication interface, if it is RS485 interface and 4~20mA instrument, you can use special wireless collector to read meter. The schematic diagram is as follows:

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