Nice color blindness book with nice illustrations for testing and demonstrating color blindness. Both numbers and figures appear in the book.
Text in both Chinese and English.
Vials contain a vacuum sealed color forming reagent to test a variety of water quality parameters. 30 individual Nitrate test vials.
Vials contain a vacuum sealed color forming reagent to test a variety of water quality parameters. 30 individual Alkalinity test vials.
Set of 5 clear PVC taps for water flow visibility when designing and constructing pipe networks. For use with an Absolute Pressure Sensor.
The PASPORT Water Quality Colorimeter is designed specifically to support the chemical analysis of water samples using PASCO’s ezSample Snap Vial test kits.
Clear PVC Venturi Tube with a constriction and two pressure ports with tubing attached, for use in a pipe network.
