electrometer tube

noun

Definition of electrometer tube

1 : an amplifier tube of extremely high sensitivity used in a vacuum-tube measuring instrument (such as a voltmeter)
2 : a vacuum tube having high impedance in the grid circuit so as to minimize the undesirable control-grid current

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Cite this Entry

“Electrometer tube.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/electrometer%20tube. Accessed 6 Jul. 2022.

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