Vibronic multisensor

A device for determining a first process variable and a second process variable of a medium, the device comprising:

• a sensor unit including a mechanically oscillatable unit, a first piezoelectric element, and a unit for determining a temperature of the medium, and
• an electronics unit,
• wherein the first process variable is a specifiable fill-level, a density, or a viscosity of the medium,
• wherein the second process variable is a sound velocity within the medium,
• wherein the device is embodied to excite the mechanically oscillatable unit via an excitation signal to produce mechanical oscillations, to detect the mechanical oscillations of the oscillatable unit, and to convert the detected mechanical oscillations into a first receiving signal,
• wherein the device is embodied to transmit a transmission signal and to receive the transmitted transmission signal as a second receiving signal, wherein the transmission signal is an ultrasound signal,
• wherein the unit for determining the temperature of the medium includes a first temperature and a second temperature sensor,
• wherein the first temperature sensor and the second temperature sensor are arranged at a distance from one another,
• wherein the first temperature sensor is arranged and configured to detect a first temperature in a first end region, facing the medium, of the sensor unit,
• wherein the second temperature sensor is arranged and configured to detect a second temperature in a second end region, facing away from the medium, of the sensor unit, and
• wherein the electronics unit is embodied to determine the first process variable using the first receiving signal and to adjust the first process variable using the first temperature, and
• wherein the electronics unit is further embodied to determine the second process variable using the second receiving signal and to adjust the second process variable using the second temperature.