RealFlow® d450
The RealFlow® d450 is a revolutionary ultrasonic flow meter designed for accurate UAV flow measurement and is compatible with most common fuels. Its innovative inline design and ability to quantify even the most dynamic flows allow for precise measurement of highly viscous fluids making it ideal for a wide range of applications. Building on the trusted performance of our existing range of ultrasonic products, the d450 delivers the same cutting-edge accuracy and reliability in a lighter and more compact package designed specifically for UAV’s. Compatible with Mil-Std-461G, DEF-STAN 59-41 and RTCA-DO-160G.
Measurement Performance
Multi-Fuel
Compatible
± 8 l/min
Operating Flow Range
±0.5% of reading
Highly accurate and repeatable
-40°C to +80°C
Temperature Range
Compact & Lightweight
For easy installation in UAV's
Low latency
Real-time measurement
Mil-Std EMC
Conforming
CAN, DroneCAN & TTL
Communications Output
The RealFlow® d450 series represent a major leap forward in UAV fuel monitoring technology. Engineered to be ultra-compact and precise, the d450 offer platform versatility and are suited to a wide range of platforms, from small tactical drones to heavy-lift cargo UAVs.
Constant powerful flow measurement for UAV’s
The innovative new RealFlow® d450 ultrasonic flow meter delivers real-time flow insights for UAV fuel consumption measurement. Leveraging Sentronics’ patented anti-aliasing technique for measurement of highly pulsating fuel systems, the RealFlow® d450 series delivers precision data for accurate flow analysis.
True multi-fuel capability
One of the standout features of the RealFlow® d450 series is their ability to deliver consistent, high-precision measurement across a wide range of fuel types. Whether operating on gasoline, kerosene, diesel, or alternative fuels, RealFlow® sensors maintain their accuracy without the need for recalibration or fuel-specific configuration. By eliminating fuel-type dependency, operators benefit from greater flexibility, reduced maintenance overhead, and enhanced confidence in their fuel data integrity – regardless of the operational environment.
Zero pressure drop design
The d450 benefits from a zero pressure drop design which supports fuel system performance and ensures no drop in engine efficiency that could be impacted by varying pressure. With minimal friction and a smooth inline flow path, the d450 eliminates pressure loss as the fluid flows through it making it superior to other flow measurement technologies that rely on turbines.
Remote bootloading capability
Featuring integrated data logging and and remote bootloading for advanced diagnostics and sensor health checking. The d450 is ideal for cloud-based fuel consumption solutions as it enables remote operating system uploads and firmware updates.
Product Specification
Measurement Performance
Repeatability
± 0.15% of reading
Uncertainty*
± 0.5% of reading
Operating flow range
0-8000 ml/min (0-480 L/hr)
Calibrated measurement range
100-8000 ml/min (30-240 L/hr)
Turndown ratio
80:1
*Calculated according to ISO/TR using root-sum square method yielding 95% confidence
Diagnostics via CAN
Calibrated volumetric flow rate (ml/min)
Calibrated cumulative volumetric flow rate (ml)
Calibrated mass flow rate (g/min)
Calibrated cumulative mass flow (g)
Max/min logging
Elapsed time counter (power on, ETI)
Run time (flow time, RTI)
Speed of sound (m/s)
Data Security and Encryption
Firmware security check-sums
Mechanical
Dry weight
<100 g
Fluid capacity
5 ml
O-ring seal elastomer
FPM fluorocarbon
Wetted materials
FPM, anodised aluminium alloy, stainless steel, PEEK
Fluid line connectors
Choice of -4AN Male or -6AN Male
Fluid operating pressure
0-25 barG
Flow tube ID
4.5mm
Electrical
Voltage
8V to 30V DC
Current
40 mA @ +12V DC
Voltage protection
Over-voltage 45V DC, reverse polarity -45V DC
Fuse requirement
1.0A maximum
Primary sensor connector
Souriau 8STA0-0406-PN
Fluid Compatibility
Diesel
Jet A-1, AVGAS, JP-5, JP-8
Gasoline
Biodiesel
Sustainable biofuel
Environmental
Operational temperature
-40ºC to +80ºC
Fluid temperature
-40ºC to +80ºC
Environmental protection
IP67
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