Thermistors are the most popular temperature sensor around as they are in almost every electronic device on the market. There are many different default resistances available for different thermistors and each can have many different 'temperature curves' / Beta values.
If you are replacing a sensor then we recommend using a multi-meter and comparing the values of your sensing with the values provided on the thermistor data-sheet. Our range of thermistor probes has been designed to be used as replacements in most typical scenarios. Our 10K8 probes will work in many standard temperature controllers although this is not guaranteed due to the wide range available.