Easy to read indicators featuring the latest
digital technology.

LMS engineers and manufactures, to exact specifications, commercial and military grade Digital Fuel Quantity Indicators. We integrate the latest technologies in delivering digital devices that our customers know they can trust. The LMS Digital Indicator is available in a compact 2” square or round package and can be modified to suit any application.

Product Overview
The indicator is a single EMI protected Multi-Tank Display (MTD).  This indicator is night vision (NVG) compatible and sunlight readable.  The MTD features a continuous display of up to 6 tanks plus total fuel.

2” Square Digital Indicator
The indicator is a single EMI-protected Multiple Tank Display (MTD). This high performance microprocessor-controlled indicator offers a 1.9” x 1.7” viewable area, with both night vision (NVG) and daylight compatibility. The legends and displayed values can be modified to suit any application.  The LED display of the square indicator utilizes four, 8-Alphanumeric character high-intensity LED display modules to create a 4-line display.  The mechanical enclosure divides the display into seven fields; six 3-digit fields for each of the individual fuel tanks, and an 8-character field for display of total fuel.  The total fuel field will also be used to post error conditions detected by or communicated to the MTD.

2” Round Digital Indicator
The 2” round digital indicator provides two 3-digit fields to display fuel quantities. Total fuel and additional tank quantities can be displayed by means of an external selector switch.

Display Control
The display is designed to allow fuel weights from up to 6 tanks on the aircraft and total fuel weight to be displayed simultaneously.  The display is implemented using a standard display controller.  Firmware communicates with the controller to display fuel quantity. Firmware also controls the intensity (brightness) of the display, based on the night/day setting.

Built-in Test (BIT)
All BIT function is implemented in firmware, but requires supporting hardware for many of the tests it performs.  Firmware is responsible for executing BIT and reporting errors appropriately.  Continuous BIT (CBIT) tests are performed while the unit is running.  Initiated BIT (IBIT) tests are executed in response to receiving an IBIT message.