"Complete+Meter+Stick+Optics+Bench"
Acrylic Double Concave/Convex Lens
Frosted acrylic lenses for optical experiments.
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Waterproof Pocket pH Tester
This pH tester is an easy-to-use pH water tester that makes monitoring water quality simple. This accurate pH tester features 0.1 resolution with automatic two-point calibration and temperature compensation in a single, portable, pocket device.
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Test Tube pH Pen, Sper Scientific
Fits standard test tubes 16×50 mm or larger.
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Clear Cylindrical Lenses for Ray Optics
Ideal selection for use with a ray box.
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Hanna Checker® Plus pH Tester
Top Seller! Designed to bring simplicity to pH testing during the any process, the HI98100 Hanna Checker® Plus pH Tester is designed for direct measurement. A replaceable electrode extends the life of your digital pH tester.
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HALO2 Wireless General-Use pH Tester
The HALO2 Wireless General Use pH Tester has a refillable glass body and spherical glass sensing bulb made for users that prefer a low-maintenance laboratory-grade pH electrode.
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Color Filter, Plastic
Spare color filter set to be used with Light Box and Optical Set.