Water Quality Colorimeter – PASPORT

Product Code: PS-2179


This PASPORT Water Quality Colorimeter is designed specifically to support chemical analysis of water samples using PASCO’s ezSample Snap Vial water quality test kits (sold separately).

Complete with built-in calibration curves to determine the concentration of ions in the solution for the ions listed on this page. Simple to use in the field, and students avoid direct contact with chemicals!

How It Works

The colorimeter accurately measures the absorbance by projecting light through the ampoule and measuring the intensity of transmitted light.  It uses Beer’s Law and built-in calibration curves to calculate the ion concentration.

What’s Included

  • 1x PASPORT Sensor Extension Cable


This product can expose you to chemicals including LEAD, which is known to cause cancer and birth defects or other reproductive harm.

Product Specifications

Range 0 to 100 % transmittance
Wavelength 660 nm (red), 610 nm (orange), 565 nm (green), 461 nm (blue)
Accuracy ±0.5 % transmittance
Resolution 0.1 % transmittance
Default Sample Rate 1 Hz
Maximum Sample Rate 5 Hz
Operating Temperature 0° to 40°C
Iron Test Kit: Measurable Range 1.5 to 8 mg/l
Nitrate Test Kit: Measurable Range 0.25 to 2 mg/l
Ammonia Test Kit: Measurable Range 0.20 to 3 mg/l
Phosphate Test Kit: Measurable Range 0.20 to 8 mg/l
Chlorine Test Kit: Measurable Range 0.50 to 6 mg/l
Total Hardness Test Kit: Measurable Range 20 to 200 mg/l
Dissolved CO2 Test Kit: Measurable Range 10 to 100 mg/l
Alkalinity Test Kit: Measurable Range 10 to 100 mg/l

Requires One Of These

ezSample Field Titrator – Total Hardness EZ-2338
ezSample Field Titrator – Alkalinity EZ-2340
ezSample Field Titrator – Carbon Dioxide EZ-2341
ezSample Snap Vial – Chlorine EZ-2339A
ezSample Snap Vial – Iron EZ-2331
ezSample Snap Vial – Nitrate EZ-2333B
ezSample Snap Vial – Phosphate EZ-2337
ezSample Snap Vial – Ammonia EZ-2334A

Recommended Accessories

Wireless Weather Sensor with GPS PS-3209

Replacement Parts

PASPORT Sensor Extension Cable PS-2500

Also Available

Water Quality Field Guide PS-2829A

Support Documents