YSI 900 Chlorine Colorimeter



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  • Operating range: 41 to 104°F (5 to 40°C)
  • 16 data sets memory capacity
  • Large, easy to read backlit LCD display
  • IP68 waterproof case
  • Photometric accuracy 3% FS
  • 20 min auto shut off after last key touched
  • approx. 17 continuous hours or 5,000 tests

The YSI 900 Chlorine Colorimeter is a rugged, waterproof, single parameter instrument for the measurement of Total chlorine or Free chlorine. Whether you need to measure chlorine in wastewater, chlorine in groundwater, or in pools, this chlorine tester is waterproof with an easy to read display and will provide readings in minutes.

The instrument features a real time clock, automatic data logging as well as the ability to export data to a PC or printer using the 900 Series Data Hub for infrared data transfer.

YSI Chlorine Reagent Powder
Chlorine, free reagent, powder, 10 mL, pack of 100 or 1000
YSI Chlorine Total Reagent Powder
Chlorine, total reagent, powder, 10 mL, pack of 100 or 1000, 0.02 to 2.00 mg/L
YSI 251399Y Secondary Reference Standard
Secondary Reference Standard, pack of 3, 0.0, 0.20 and 1.0 mg/L
YSI 200900Y Data Hub
900 series data hub for infrared data transfer
YSI 251392Y Primary Standard
Primary standard, 100 mL, 1.5 mg/L