Yes, Mysa supports the majority of existing in-floor sensors. If you already have a sensor installed in your floor prior to the installation of the thermostat, please be sure to determine the resistance of your thermistor to ensure it's compatibility with the Mysa- this can be done using an ohmmeter which will display the resistance (eg. 10KΩ). If you want to install a sensor before the Mysa thermostat arrives, we recommend installing a standard 10KΩ sensor.