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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.
Measures the water content of soil and reports it in percent. For use with PASPORT Interfaces.
Easily measure heart rate before, during, and after exercise with the data transmitted wirelessly to your devices.
Vials contain a vacuum sealed color forming reagent to test a variety of water quality parameters. 30 individual Chlorine test vials.
Used for measuring the temperature of liquids, air, and other materials. ScienceWorkshop Version.
Designed to be placed in air or water flow. When connected to the General Flow Sensor, aids in measuring pressure differences.
This rack filters 0%, 25%, 50%, 75% and 100% of incident light to simplify the study of primary productivity.
The PASPORT Breath Rate Sensor uses a disposable dust mask to measure breath rate. 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 for testing a variety of water quality parameters. 30 individual carbon dioxide test vials.
Vials contain a vacuum sealed color forming reagent to test a variety of water quality parameters. 30 individual Nitrate test vials.
