Download Datasheet CFS1

CAPACITIVE FUEL SENSOR
CFS1
Arrow Aviation’s new CAPACITIVE FUEL SENSOR
has been designed specifically for light weight aircrafts,
replacing unreliable mechanical float mechanisms. The
unique design has NO MOVING PARTS and has a weight
of only 63 g. The sensor operates from a wide power input
range of 11 VDC to 35 VDC and provides a 0 VDC through
5 VDC output level. The internal capacitive sensing element
circuit for reliable signal conditioning are key to its high
performance. This unit has an operating temperature range
of -35°C through +70°C and offers a 3-wire electrical
connection with built-in reverse polarity protection.
The 10 mm diameter aluminum pipe guarantees an easy
installation. A unique vent fitting allows the installation of
the sensor outside of the fuel tank by connecting the bottom
of the sensor to the bottom of the tank with a tube according
to the principle of communicating containers.
This sensor’s excellent vibration resistance makes it the unit
of choice for a wide variety of aircraft applications.
TANK
VENT
FUEL
QUANTITY
INDICATOR
CAPACITIVE
FUEL
SENSOR
MAXIMUM
FUEL LEVEL
TANK
VENT
CAPACITIVE
FUEL
SENSOR
FUEL
QUANTITY
INDICATOR
MAXIMUM
FUEL LEVEL
FUEL
TANK
MINIMUM
FUEL LEVEL
Arrow Aviation’s primary function is the design
of application specific sensors to meet
demanding requirements. Using capacitive
sensing technologies, Arrow Aviation
offers a wide variety of custom
outputs, housings, mounting ports,
electrical connections, ranges and
environmental protection
configurations.
FUEL
TANK
MINIMUM
FUEL LEVEL
SPECIFICATION
Temperature Range:
Altitude:
Humidity Range:
Electromagnetic
Compatibility:
Random Vibration:
Weight:
Physical Dimension:
Mounting:
Ventilation Fitting:
Connection wires:
Supply Voltage:
Quiescent Current:
Output Voltage Range:
Output Current:
Output Load Resistance:
Output Load Capacitance:
Accuracy:
CHARACTERISTIC
-35°C to +70°C
-1,200 feet to 20,000 feet
up to 95% at +55°C for 12 hours,
non condensing
according to RTCA DO-160 A specification
according to MIL-STD-810E specification
0.063 kg
Width:
40 mm
Height:
350 mm
Depth:
20 mm
10 mm whole in fuel tank
CAUTION: Do not drill wholes in the sensor
head or serious internal damage will result.
6 mm
3 x AWG22 shielded:
white/orange:
power input
white/blue:
aircraft ground
white:
signal output
11 VDC to 35 VDC
protection for reverse polarity
typical 1.6 mA, max. 2.7 mA
0VDC to 5 VDC
max. 10 mA
2 kΩ
500 nF
± 0.5% full scale from +10°C to +30°C
± 1% full scale from -10°C to +30°C
± 2% full scale whole operating range
Ø6 mm
15 mm
40 mm
20 mm
40 mm
350 mm
Ø10 mm
295 mm
Dealer:
A Division of Arrow Group GmbH
[email protected]
CFS1-P, Printed in Switzerland, Copyright  2004 by Arrow Group GmbH, Switzerland, All rights reserved.