TARDIS Index File

Time sensor

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The Third Doctor's time sensor hones in on the Master. (TV: The Time Monster)

A time sensor was a device which, according to Jo Grant, "detect[ed] disturbances in the time field". It was most useful as a "TARDIS sniffer-outer", In particular, it was used by the Third Doctor to detect the presence of the Master's TARDIS. It was calibrated to provide distances to a disturbance in Venusian feet and miles. (TV: The Time Monster)

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