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The Acu-Trac® Smart 485 family ultrasonic liquid level transducers are designed for continuous level monitoring and liquid level control applications. These non-contact continuous level transducers can monitor tanks or storage containers that have a depth of up to 1.9 meters (75.69 inches) for gasoline and 2.5 meters (98.4 inches) for other media.
The Acu-Trac® Smart 485 ultrasonic transducers incorporate a RS-485 bus for real time processing of liquid levels in two messaging formats.
The Smart 485 liquid level transducers offers three electrical outputs for level control in the following forms:

• 4-20 mA Current (12V or 24V input)

• Ratiometric Voltage 0.5 to 9.0 Volt (12V input)

• Non-Ratiometric 0.5 to 9.5 Volt (24 Volt input).

The Smart 485 liquid level transducer is designed with power up self diagnostics and allows the user flexibility through programmable features:

• Tank Configuration Profiling

• Digital Filtering

• Gauge Drive Output (full and empty endpoints)

• Communication Mode.

Note: An Acu-Trac® Smart 485 Configuration Kit is required to program the liquid level transducer.

• Accuracy: 2 % full scale of tank volume

• Reliability: Acu-Trac® Smart 485 liquid level transducers are non-contacting. Resistive float senders have a wiper that slides across a resistive strip that with time can wear out and cause intermittent or complete loss of the signal.

• Non-Invasive: Acu-Trac® Smart 485 mounts to the same opening as the resistive float sender, but does not protrude into the tank.

• Digital Filtering: User programmable time constant in digital filtering eliminates errors due to fluids sloshing in mobile tanks.

• Tank Profiling: User programmable strapping tables for unique tank shapes.

• Chemical compatibility: Acu-Trac® Smart 485 works with a wide variety of media including diesel, gasoline, motor oil, hydraulic fluid, black water, and more.

• Self Test/Diagnostics: Internal Power Up Test verifies transducer is operating properly.

• Continuous Real Time Liquid Level Monitoring: Electrical output and RS-485 messaging data.

• RS-485 Messaging: Two types of messages – programming commands and timed data broadcast messages. (See AT-AN14 for more details)

• NEMA 4 Rating