Instantaneous water heater probes have a special design that is exactly tailored and qualified for the specific application. Usually immersion probes with a ceramic sleeve are used because this is particularly resistance to high electrical voltages.
Based on your specifications, the temperature sensors can be manufactured either with cable and wire end sleeves or with the connectors suitable for your application. We would be pleased to discuss your application or individual specification with you and then suggest a qualified sensor type for it.