trigger tube

trigger tube

[′trig·ər ‚tüb]
(electronics)
A cold-cathode gas-filled tube in which one or more auxiliary electrodes initiate the anode current but do not control it.
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References in periodicals archive ?
The full consolidation of Micronic Traxcer code reader software with Track-IT allows users to directly trigger tube or rack barcode scanning from the Track-IT program.