A suitable connector for use with the Digitron 2024T thermometer is Stock Number < 636-0190') 636-0190/. Pt100 Needle Probe. This probe houses a PT100 sensor within a sharpened needle Probe sheath is made from food-grade 316 Stainless Steel The bulbous handle enables the sensor tip to penetrate semi solid material for sub surface temperature measurement Un-terminated 4 wire connection lead