Handheld RTD thermistor probes have a straight or coiled cable with a terminal connection like a mini plug or 3-pin connector that connects them with a meter or receiver. Different thermistor types can be used to measure varying temperature ranges, and various wire insulation and sensor materials can be used for multiple resistance properties. Typically built with durable plastic or steel handles, these probes are commonly used for manual inspection, maintenance, and other general temperature measurements.