Product
Fuel Quantity Indicators
Ensure Accurate and Reliable Fuel Measurement
LMS is a leading manufacturer of high-performance Digital Fuel Quantity Indicators (DFQIs) for commercial and military aircraft. Our DFQIs are designed to integrate seamlessly with our Signal Conditioning Units (SCUs), providing pilots with precise, real-time fuel level data to enhance safety and decision-making in the cockpit.
A critical component of the refuel control panel, our DFQIs play a key role in the overall fuel management system by ensuring accurate data gathering and transmission from the fuel tanks to the cockpit. By focusing on digital technology, LMS delivers superior readability, customization, and accuracy, setting a new standard in fuel management.
Product Benefits
Enhanced Readability
Bright, digital displays offer superior readability compared to traditional needle gauges, especially in low-light conditions.
Precision Measurement
Advanced electronics deliver precise fuel level measurements, ensuring safe and efficient flight operations.
Compact Design
Available in compact 2-inch square or round configurations, our DFQIs fit seamlessly into existing instrument panels.
Customizable Displays
Configure your DFQIs to display up to six individual fuel tanks, along with vital information like total fuel quantity and error codes.
Rugged Construction
Built to withstand the demanding environment of the cockpit, our DFQIs are EMI and environmentally tested per industry standards (MIL-STD-461/810 or DO-160).
Easy Integration
Compatible with both analog voltage and ARINC 429 digital inputs, our DFQIs integrate effortlessly with existing fuel management systems.
Technical Specifications
- Features (Square)
- Features (Round)
- Operational Temp. Range
Features (Square)
- Analog Voltage (up to 7) or Arinc 429 (1 or 2 channels) Inputs
- Standard MS27560 Environmentally Sealed Case
- Continuous display of up to 6 tanks + total
- Error code display
- Mechanical enclosure divides the display into 4 to 7 fields
- Display Control (typically Pounds/Kilograms)
- Lighting Control Input
- Dimming Control Input
- EMI and environmentally tested as per MIL-STD-461/810 or DO-160
- 28VDC Aircraft Power
Operational Temp. Range
-55° C to +75° C
Features (Round)
- Analog Voltage (up to 4) Inputs
- Standard MS33639 2” Round Environmentally Sealed Case
- Single line display shows two tanks simultaneousness or rotates through each tank, total, and an error display indication
- Display Control (typically Pounds/Kilograms)
- Lighting Control Input
- Dimming Control Input
- EMI and environmentally tested as per MIL-STD-461/810 or DO-160
- 28VDC Aircraft Power
Technical Information
| No. | Section and Description | Category |
|---|---|---|
| 1 | Temperature & Altitude | C2 |
| 2 | Temperature Variation | A |
| 3 | Humidity | B |
| 4 | Operational Shocks and Crash Safety | B |
| 5 | Vibration | S |
| 6 | Explosive Atmosphere | E |
| 7 | Waterproofness | Y |
| 8 | Fluids Susceptibility | F |
| 9 | Sand and Dust | D |
| 0 | Fungus Resistance | F |
| 11 | Salt Fog | S |
| 12 | Magnetic Effect | Y |
| 13 | Power Input | ZXX |
| 14 | Voltage Spike | A |
| 15 | Audio Frequency Conducted Susceptibility | Z |
| 16 | Induced Signal Susceptibility | ZC |
| 17 | Radio Frequency Susceptibility (Radiated and Conducted) | T |
| 18 | Emission of Radio Frequency Energy | M |
| 19 | Lightning Induced Transient Susceptibility | A4XXXX/A3J3L3 |
| 20 | Lightning Direct Effects | XXXX |
| 21 | Icing | A |
| 22 | Electrostatic Discharge (ESD) | A |
| 23 | Fire, Flammability | C |
Upgrade your fuel management today
Ready to Take Flight with Reliable Fuel Measurement?
Contact LMS today to learn more about our Digital Fuel Quantity Indicators and how they can elevate the performance and safety of your aircraft fleet.