Rosemount Ultrasonic Level Transmitter The Rosemount ultrasonic liquid level transmitter has a 36ft (11m) range. The ultrasonic pulse signals are transmitted and reflected from the liquid surface. The transmitter ’listens’ for reflected signals (echoes) and measures the time delay between transmitting and receiving. The distance to the liquid surface is automatically calculated using the computed time delay. The transmitter then calculates the liquid depth (level) and outputs the level ranging between 4mA and 20mA signal with HART communication. Note: The 3101/3102/3105 Ultrasonic Level transmitters should not be mounted directly to metal. It is highly recommended to use Rosemount mounting flanges. Features and Benefits Housing material is made of glass filled nylon Conduit/Cable thread of M20 x 1.5 supplied with nylon cable glands (Plastic Housing only) Process connection is 2in BSPT thread Measures liquid height, distance to liquid, volume or flow in open channels Eliminates problems experienced with contacting instrumentation Simple set-up and operation with an integral LCD display and buttons Low cost of installation and commissioning Minimal maintenance after installed Process downtime minimized Non-contacting measurement with no moving parts Two integral signal relays Corrosion-resistant PVDF wetted material Two-wire 24V direct current loop-powered Automatic temperature compensation Applications Storage tank levels Open channel flow Effluent pits Reservoir level Buffer tanks Industrial and water applications