A hardy and accurate laboratory thermometer is a necessity. This 10-inch (30 cm), precision thermometer measures the full range from -20 degrees to 110 degrees C. Made to be used in process applications (inserted into flasks for continuous monitoring) or immersed in beakers to spot-check temperatures. Lowest price anywhere on professional thermometers! $4.50 each!

FULL RANGE PH TEST PAPERS

Indispensable for lab work! Simply dip paper wick into liquid or wet surface to measure acidity or alkalinity level. Full range from pH 1-14. Readings in red hues (1-6) indicate acids. For instance, strong acids like sulfuric and nitric test around 1 (red), while weak acids like acetic and carbonic test around 6 (yellow). A pH of 7 (green) is neutral (distilled water). Weak bases like calcium hydroxide test around 8 (blue), while strong bases like sodium hydroxide test around 14 (purple). Also indicates relative hydrogen ion concentration (increases with acidity). Includes full color chart. 100 test strips. Item #SK135. $4.95

Set of six plastic measuring spoons covers a range popular lab measurements. One each of  0.6 ml, 1.2 ml, 2.5 ml, 5 ml, 7.5 ml, 15 ml. Also marked with English equivalent value in teaspoons. Item #SK323. $2.95

Sturdy tongs have serrated jaws with 1 inch flat holder that make them ideal for handling test tubes, beakers, bottles, or crucibles. Item SK231. $6.95

Specially designed brush for cleaning test tubes or bottles features hardy nylon bristles with flared rounded end. 8 inches long. Item #SK209. $3.95