The 5623B is specially sealed from the sensing element to the end of the probe cable, which prevents ingress of moisture when exposed to temperatures as low as -100°C. The assembly can be fully immersed in fluids so is ideal for the verification of freezers or autoclaves where a thermo-well isn’t available. Available in a 6.35 mm diameter and 125 mm long Inconel™ sheath. Temperature range of -100°C to 156 °C, and accuracy of ± 0.05°C over its full range.