The AC Quantum Voltmeter consists of the following components:  

1. 10 V programmable JVS array chip
2. Cryoprobe with magnetic shield
3. Compact 70 GHz microwave source
4. Programmable 20 channel bias source
5. Control electronics with optical isolation unit
6. Nanovoltmeter as DC null detector
7. Sampler for AC voltage measurements
8. Waveform generator with synchronisation unit
9. Multiplexer with polarity switch
10. Two-stage Pulse Tube Cooler
11. Air-cooled Compressor, 4 kW input power
12. Host computer with control software
13. Sensors for temperature, humidity, and barometric pressure
14. Optional 1: GPS 10 MHz reference frequency
15. Optional 2: Liquid helium Dewar
16. Optional 3: Vacuum Pump (cryocooler)