What type of meters requires users to interpret a scale manually?

Analog meters require users to interpret a scale manually because they display measurements through a needle that moves over a dial or scale. This type of meter relies on the user reading the position of the needle against the graduated markings on the dial to determine the measurement value. Unlike digital meters, which provide a direct numerical readout, or smart meters, which can transmit data electronically, analog meters necessitate human interpretation of the scale, making it essential for users to have a good understanding of how to read these instruments accurately. This characteristic sets analog meters apart from other types of meters listed, highlighting their distinct operation and the skill set required for effective use.