A flow control device adapted to receive a feed set includes a housing capable of receiving at least a portion of the feed set. The delivery device is supported by the housing, and the feed set is received by the housing, so that the pressure sending device acts on the feed set and generates fluid flow in the feed set for delivery of the fluid to the object Positioned to contact. The ultrasonic sensor is supported by the housing and is arranged for the pressure sending device to generate a sensor signal indicative of the viscosity of the fluid delivered through the feed set. The control circuit communicates with the ultrasonic sensor to communicate with the ultrasonic sensor to receive a sensor signal indicative of the viscosity of the fluid from the sensor and controls its operation.
