H. Aron direct current power meter

This meter is a device used for measuring electrical load (ampere hours) and electrical energy (watt hours) of the direct current received from the network by a consumer. At it most simple, the operation of the meter is based on the movement of pendulums connected to the grid voltage. The pendulums move at a given speed in the electric field created by coils connected to the power network. The characteristic movement of the pendulums is then transferred to a mechanism that allows the value of the load and energy received to be read. This type of meter was widely used until early 20th century, alongside designs using an electrical motor or electrochemical phenomena (hydrogen and mercury meters). The pendulum meter presented here was produced by the company established by Hermann Aron who worked in physics and electrical engineering. Manufacturer: Hermann Aron, Elektrizitätszähler Fabrik GmbH, 1905 Inv. No.: MIM1703/IV-76 Model prepared on the basis of photogrammetric measurements. Licence: CC BY-NC-SA