SSI Technologies, Inc. Controls Technologies Division

Acu-trac® NEMA4 Fluid Level Sensors

The Acu-Trac® NEMA4 fluid level sensors are non-contact sensors that are a direct replacement for level senders on tanks with depths up to ≤ 1.5 meters (59 inches). The NEMA4 fluid level sensors offer a choice of outputs (analog current loop; ratiometric voltage; or non-ratiometric voltage).

The NEMA4’s RS-485 bus allows real time processing of fuel data and messaging over the RS-485 bus.

The RS-485 bus also provides the user flexibility to program the NEMA4 fluid level sensors for tank configuration, digital filtering, sensor mounting offset, gauge drive output full and empty endpoints and communication mode.

Please check out our complete library for Acu-trac® downloadable files on the Resource Library page.

NEMA4 fluid level sensors

More Accurate: 2 % of tank volume

More Reliable: Acu-Trac® NEMA4 fluid level sensors are non-contacting. Resistive float sender have a wiper that slides across a resistive strip that with time can wear and cause intermittent or complete loss of the signal.

Non-Invasive: Acu-Trac® NEMA4 fluid level sensors mount 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® NEMA4 fluid level sensors work with a wide variety of media including diesel, motor oil, hydraulic fluid and black water.

Self Test/Diagnostics: Power Up Test verifies sensor is operating properly and diagnostic messages are sent over the RS-485 bus.

Real Time Fuel Data: Real time fuel data over the J1708 data link for on vehicle communication.

RS-485 Messaging: Three types of messages are provided on the RS-485 bus – setup and programming commands, timed data broadcast message, and diagnostic messages.

NEMA 4 Rating

CE Mark Class B Rating.