Our offices will be closed on Monday, May 28th in observance of Memorial Day
FedEx shipped orders placed before 6:00PM ET on Friday, May 25th will ship same day (if paid for by Credit Card or PO account in good standing & based on product availability). Orders placed after the Friday cutoff will ship on Tuesday, May 29th. Please see our Business Policies for earlier shipping cutoff times for drop-shipped items and shipping by other carriers.
Ultrasonic sensors emit a sound impulse and measure the elapsed time of the echo from a detected object. General purpose ultrasonic sensors can operate as downward facing, non-contact level sensors. Models are available with discrete (object detection) or analog (distance sensing) outputs.