"Classification+Learning+Activities"

Superior realism, reliability, and durability.

High-quality binoculars at an affordable price.

Test method: The Peracetic Acid CHEMets® test kit (0 to 1 and 0 to 5 ppm) employs the DPD chemistry. The sample is treated with an excess of potassium iodide. Peracetic acid oxidizes the iodide to iodine. The iodine then oxidizes DPD (N,N-diethyl-p-phenylenediamine) to form a pink colored species in direct proportion to the peracetic acid concentration. Various oxidizing agents such as halogens, ferric ions and cupric ions will produce high test results. Hydrogen peroxide does not interfere with this test if present at levels comparable to the peracetic acid levels.

Superb image quality.

Precision instruments made for repetitive use in student field investigations.

A dual sex torso showing skull structure.

Normal and pathological structures.

A general-purpose pH sensor used to monitor pH of aqueous solutions.

The Vacu-vials® instrumental test kits employ the DPD chemistry and are accepted by the USEPA for wastewater and drinking water analysis.

LabQuest® 3 is a powerful, advanced, easy-to-navigate, and versatile data-logging solution for STEM students.

The Go Direct Electrode Amplifier is a mV and pH amplifier that connects to Vernier electrodes and compatible third-party BNC electrodes.

Compact and convenient.

This fossil replica represents an ancient sea urchin that crawled along the seafloor, feeding on algae. Although they are rarely preserved, echinoderms that looked like this had long spines like the sea urchins of today.

ACTIVATOR SOLUTION PK6

Precision instruments made for repetitive use in student field investigations.

Robust and accurate portable visible light spectrophotometer.