The Flowline EchoTouch US01 & US03 level transmitter is an intrinsically safe reflective ultrasonic level transmitter provides continuous level measurement up to 9.8ft (3m) with a 4-20mA analog signal output, and is configured via the Flowline WebCal software. The non-contact liquid level sensor features our proprietary Reflective Technology™ that delivers reliable level measurement in condensing environments. The US01 and US03 is ideal for small tanks with non-foaming or highly vaporous media such as chemicals, water, wastewater and oil.