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YSI 9500 Photometer



Country of Origin


Flexible Photometers for the Lab or the Field

Eliminate sample preservation by taking your portable, waterproof instruments to the field to perform the analysis on-site. All reagents are safe and easy to use.

Selecting desired test has never been easier. Simply navigate among the list of available tests on the screen (favorite tests stay at the top) of the instrument to choose your test and say "OK". The instrument will then walk you through the steps to complete the test. Simple. Convenient. Accurate.

Accuracy ± 0.5% at 4% transmittance; ± 0.005 at 0.3 AU
Resolution 0.001 AU
Operating Wavelengths 450, 500, 550, 570, 600 and 650 nm
Display Graphic, backlit LCD with on-screen instructions
Power 3x AA batteries; the 9500 can also be powered via USB
Size (WxLxH) 146 x 275 x 75 mm (5.8 x 10.8 x 3 inches)
Weight 975 g (2 lbs)
Test Cells Automatic Adjustment from 12-20 mm diameter

Product dimension

L X W X H = (146 X 275 X 75) mm



  • Direct-reading concentrations with automatic set up
  • Waterproof; IP67 (floats)
  • Large backlit graphic display
  • Unique sample tube holder accomodates various diameters
  • On-screen instructions
  • Multiple languages (English, French, German, Spanish, Italian)
  • 100+ test choices on the photometer display

Additional Features:

  • Waterproof USB connection
  • Power via USB port
  • Internal Memory - 500 sample sets (date and time stamped)
  • User-Selectable Options: test units, sample number, dilution factors

Advanced software built into the 9500 instrument remembers the most recent tests, making it even quicker to use the next time. Connect to a PC via USB and drag and drop the files to transfer data or update instrument software. In addition, the 9500 allows up to 30 user-defined test methods allowing full flexibility in a range of test methods.


 1 Unit

Product Application

Measure the chemical content in water, such as:

- Alkalinity

- Aluminum

- Ammonia

- Bromine

- Chloride

- Chlorine

- Chlorine Dioxide

- Chromium

- Copper

- Cyanuric Acid

- Fluoride

- Hydrazine

- Hydrogen Peroxide

- Iron

- Magnesium

- Manganese

- Molybdate

- Nickel

- Nitrate

- Nitrite

- Organophosphate

- Phenol

- Phosphate

- Potassium

- Silica

- Sulfate

- Sulfide

- Zinc

Expiration date

No expiration time