Hydro-Light Water Pad Tester for ASTM D3240 - 99709-0

ASTM D3240

The Hydro-Light Water Pad Tester provides results efficiently with an easy one step measurement process. The instrument is designed so the result is read from the pad – simply put the pad in the slide then place the slide in the machine and read the digital display to determine the free water content of the fuel up to 50 PPM. Hydro light provides increased accuracy and reliability with greatly improved repeatability and reproducibility.

Hydro-Light Water Pad Tester for ASTM D3240 - 99709-0


  • No user calibration required
  • Long life LED light source
  • +/- 0.5 PPM accuracy
  • Digital readout in PPM within 3 seconds
  • Simple to use



Calibration: Hydro-Light sensor should be calibrated annually by the factory. The instrument has no internal electrical adjustments that need to be maintained inside this period.

Supplied with;
Wall Power Supply
Slide In Pad Holder
High & Low End Standard Shuttle


ASTM D3240 Free Water Measurement in Aviation Fuel (0-50 PPM)


Measurement TechnologyLED source amplified photodiode receiver, microprocessor controlled
Readout LCDmicroprocessor controlled Readout LCD: Internal Test Messages, Status, and PPM Pad Reading
Time to Reading10 seconds from shuttle input
Reading Update3 seconds
Range0-50 ppm
Precision+/- 0.5% of reading
Resolution0.1 ppm
Warm-up1 minute from initial power-up
Power100 – 240 VAC 50/60 Hz 0.6A
Pad Type25 mm Pad with Fluorescein Dye
Chemical RangeLimited by Test Pad (See ASTM RR-1156)
CCCN CodeTariff 90268020

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