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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.
Set of 5 clear PVC taps for water flow visibility when designing and constructing pipe networks. For use with an Absolute Pressure Sensor.
This small plastic bottle is designed to allow simultaneous sensor measurements of oxygen gas and carbon dioxide gas.
Vials contain a vacuum sealed color forming reagent to test a variety of water quality parameters. 30 individual Chlorine test vials.
Vials contain a vacuum sealed color forming reagent to test a variety of water quality parameters. 30 individual Ammonia test vials.
Measures the water content of soil and reports it in percent. For use with PASPORT Interfaces.
3 interconnectable polycarbonate chambers for building your own ecosystems. Designed to easily integrate sensors for quantitative environmental measurements.
Vials contain a vacuum-sealed color forming reagent to test a variety of water quality parameters. 30 individual Total Hardness test vials.
This rack filters 0%, 25%, 50%, 75% and 100% of incident light to simplify the study of primary productivity.
Vials contain a vacuum sealed color forming reagent to test a variety of water quality parameters. 30 individual Alkalinity test vials.
Vials contain a vacuum sealed color forming reagent to test a variety of water quality parameters. 30 individual Nitrate test vials.
