Six plastic sieves with stainless steel mesh, cover and bottom collector.

Three measuring cups with handles.

Separate soil ranging in size from pebbles to silt.

For water clarity measurements.

Premium quality, solid North American Maple.

Available with plain or metal ends.

Simplified dissolved oxygen water sampler designed for use in the field.

Columbus-type caliper with dual scale.

Lightweight, multi-use storage pail with carrying handle.

Convenient pH testing. OHAUS Starter pH Pen Meters offer a convenient way to measure pH, or the relative acidity or alkalinity of a sample at a given temperature. The pH pen meters can be completely operated with just one hand, freeing up your other hand to handle samples.

Combination of hydrogen with oxygen generates a DC current to power an electric motor.

Instantly measures soil moisture and light conditions — no batteries required.

Portable, lightweight meters feature productivity and versatility in the field or lab. OHAUS Starter Water Analysis Portable Meter is a compact meter with intuitive software/organized display for ultimate usability.

Measures phosphate levels from 0, 100, 200, 300, 500, 1000, 2500 ppb in 15 seconds

Convert mechanical energy into electrical energy.

Large four-digit readout shows counts per minute or continuous counting.

Unique design for constructing square cubic meters or connecting meter sticks.

Teaches sampling techniques, careful measurement and data recording.

Ideal for long-term water-quality monitoring.

Durable wood ruler features a metal edge that resists wearing.

Made of shatter-resistant material.

Compact meter reads from 0 to 1999 foot-candles with resolution from 0.1 to 1.

Set of six spoons.

Both edges are calibrated in millimeters.

Smooth, hardwood solid shapes.

A fun and interactive way to learn the benefits of composting.

Designed for simple, accurate test readings.

A colorful and informative science-themed bulletin board set.

Demonstrate the workings of a complete clean energy system on a miniature scale.

Retrieves with ease — one line means no more tangles.