All categories
Fieldwork
Nest Boxes
Garden Items
Books
Education
Gift items
Second chance
New
Deals
Repairs
Job offer
Close
Measure turbidity in streams where a Secchi disk cannot be used
Build & use the periscope to teach kids about mirrors, reflections, submarines and much more!
The Secchi Disk allows quick determination of turbidity or degree of underwater visibility in natural water supplies.
Easy-to-deploy, fully submersible model MX801 for monitoring water conductivity/salinity, temperature, level, and dissolved oxygen.
Met deze Edukaart leer je van alles over waterdiertjes en tips hoe je waterdiertjes kunt vangen.
The Xtreem submersible temperature logger has an accurate temperature sensor for measuring the temperature under water.
Door het oplossen van puzzels, kleur- en zoekplaten en leuke opdrachtjes, leer je alles over de onderwaterwereld.