Table 1

Comparison of the different tubes used for testinga.

Tube naming Gas Outer diameter (mm) Length (mm) Recommended voltage (V)
BF3 LND2043 BF3 89 697 2120–2370
BF3 (thin) LND20366 BF3 51 652 900–1150
He3 LND25373 3He 51 652 1200–1450

Tubes are manufactured by LND Inc., USA and available through

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