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Electronic sensor for the detection of free water in Jet fuel.

• Qualified and tested according to specification EI 1598, 2 nd Edition
• Accepted by Joint Inspection Group (JIG)
• Recommended by IATA Fuel Quality Pool (IFQP)

The AFGUARD ® sensor is qualified for use as an alternative to Chemical Water Detectors (CWD).  The
AFGUARD ® is regarded as fail safe and fully hazardous-area (ATEX and IECEx) approved. Sensor Sys-
tem conforms to ISO 13849 standard.
Application area (with reference to individual EI standard):

• EI 1598 2 nd edition sensor can/shall be used in conjunction with EI 1581 filter/water separators,
EI 1583 filter monitors, EI 1599 dirt defence filter as well as other technologies

Technical Data

Standard design

The AFGUARD ®  is a unique design combining quality and safety approved standards. This allows a
fast and simple field installation into pipework. Standard calibration settings and operating parame-
ters are made to meet requirements and operational procedures.

Recommended Accessoires

• Control system for water level indication (e.g. FAUDI Aviation Contamination Control System)
• Flashing lamp for alert function if water is detected (e.g. FAUDI Aviation blue lamp)
• Functional check system (e.g. FAUDI Aviation Loop tester)
• Torque Wrench



A precisely defined light beam penetrates the process medium. The IR signal passes through the
medium to be examined and is reflected by the mirror back to the receiver. When free water is pre-
sent in Jet fuel, the emitted light is scattered at the water/Jet fuel interface. If refraction index of the
medium is different to Jet fuel, sensor comes up with an alarm signal.