The C12 HACCP Food Thermometer does use Probes with Negative Temperature Coefficient (NTC) Thermistors, however there are many different types of NTC Thermistors available, with different specifications, which may not give accurate results if used with the C12.
We would recommend only using Probes we supply with and for the C12 HACCP Food Thermometer to be sure that the stated instrument accuracy is obtained.
A full list of compatible probes can be found here – Probes for C12 HACCP Food Thermometer