A grain bin temperature sensing probe has an elongate housing formed in modular sections supporting respective temperature sensors thereon for connection between a tip for penetration into the bed of grain and a transmitter housing arranged to transmit the measured temperatures and the sensor identification associated therewith to a receiver for being displayed to a user. A main wire is connected between the transmitter and each sensor to both deliver electrical power to the sensors and transmit data from the sensors. Electrical contacts in series with the main wire permit sections of the main wire to be readily reconnected automatically when the modular sections of the housing are mechanically joined.
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