A Agroshield Member Messages 4,903 May 7, 2024 #2 It says on the label what it does. It is an amp meter, for up to 3A. That is why it says 'scale reading x 0.2'. 15 x 0.2 = 3. The bit with the sticker on is a shunt. You can use the same gauge with a different shunt for a different range of reading (https://uk.rs-online.com/web/content/discovery/ideas-and-advice/shunt-resistors-guide).
It says on the label what it does. It is an amp meter, for up to 3A. That is why it says 'scale reading x 0.2'. 15 x 0.2 = 3. The bit with the sticker on is a shunt. You can use the same gauge with a different shunt for a different range of reading (https://uk.rs-online.com/web/content/discovery/ideas-and-advice/shunt-resistors-guide).
E eddie49 Member Messages 4,178 Location Reading, Berkshire May 7, 2024 #3 The ammeter is made by Griffin & George Ltd., who supplied electrical and scientific equipment to schools. It was probably used in the 60's in a school physics lab somewhere.
The ammeter is made by Griffin & George Ltd., who supplied electrical and scientific equipment to schools. It was probably used in the 60's in a school physics lab somewhere.
Bullet2012 Member Messages 4,656 Location Berks May 8, 2024 #4 It’s a speedometer from a jules Verne era space-time machine. It measures speed in universes per hour as it shows on the dial Previous replies may be more accurate.
It’s a speedometer from a jules Verne era space-time machine. It measures speed in universes per hour as it shows on the dial Previous replies may be more accurate.
Matrixx Member Messages 770 Location North Duffield May 8, 2024 #5 Its a moving coil, shunt Ammeter 0-3 A as mentioned above.