Intended as a replacement part or upgrade to indicate the load on your CO2 laser tube. Wire between the cathode (black wire) connections on your high voltage PSU. Note DO NOT WIRE TO RED HIGH VOLTAGE WIRING.
The ammeter fits a round hole of 50mm OD and comes with M3 sized mountings. Wiring should be connected with a M3 ring crimp.
Item ships as Royal Mail Small Packet due to size.