"Complete+Meter+Stick+Optics+Bench"

Set of 5 acrylic filters.

Excellent for student use.

Demonstrate refracrion and internal reflection.

Illuminate the path of light through an acrylic block.

Demonstrate the bending properties of light.

This handy meter measures soil moisture at the root level to prevent over or underwatering. No batteries are needed, so there is nothing to replace or wear out. It includes an instruction booklet, watering guide, and special needs information for 15o plants that correspond to meter readings. Range: 0 (dry) to 10 (wet). Size: 4"L x 2 1/2"W x 1 1/2"H. Probe: 4 1/4"L.

With this meter, you can survey for alpha, beta, and gamma radioactivity or monitor a work area.

The Go Direct Optical Dissolved Oxygen Probe makes it easy to measure dissolved oxygen concentration, water temperature, and atmospheric pressure.

Classical demonstration of refraction and internal reflection.

The Newton’s Rings Apparatus consists of a plano-convex lens on top of a flat glass plate, held together by a plastic frame.

Reveal the Nature of Color and Light

Demonstrate refraction and internal reflection.

Make your crafts stronger.

This updated Ray Box uses five super bright LEDs for bright, white rays that are clearly visible.

Large scale model of Young's double slit experiment.

Demonstrates the principle of diffraction grating.