
This handheld pH meter from Hanna Instruments measures 0-14 pH to 0.01 resolution, accurate to +/- 0.2. Calibration screw for 7.01, and another for 4.01 or 10.01 pH. The unit is 6-3/4" X 2" X 15/16" OA, with a 4-digit 1-1/8" X 1/2" LCD readout, and a replaceable 4-1/8" long x 9mm dia probe that screws into the case. Comes with a tip cover for the probe and (2) button-cell batteries. Don't forget to order the 20mL foil packs of pH 4.01, 7.01 or 10.01 Buffer Solution, with a chart listing the specific pH of the solution at various temperatures. Made for laboratory or industrial use only, it has a tolerance of +/-0.01 pH at 77°F. Also from Hanna Instruments.
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93947 BUFFER SOLUTION PH 10.01 | |
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93946 BUFFER SOLUTION PH 4.01 | |
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93009 BUFFER SOLUTION PH 7.01 | |
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92999 PH METER |
A honey of a little digital scale, the techies in the back room say. This improved Triton T2® scale is pocket-sized (5-7/8" x 3-1/8" x 3/4" thick), and measures up to 300g x 0.1g, 10.5 oz x .005 oz, 190 pennyweight x 0.1 dwt, and 9.6 Troy ounces x .001 ozt. Has a zero/tare button and a cover that can be removed for use as a larger tray. Comes with (3) "AAA" batteries.
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93159 TRITON T2 SCALE |
Rare earth magnets are usually killers for their size, and these thick nickel neodymium discs are no exception. The price, on the other hand, for (3) 7/16" dia x 1/4" 5-lb lift or (2) 9/16” dia x 3/16” 8-lb lift magnets each stored on a 2" dia steel disc, is a rare exception.
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93463 MAGNETS, SET OF 2 | |
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92042 MAGNETS, SET OF 3 |
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 yrs.
This nice 2 in 1 gear-box kit features (2) different gear ratios (1:60 and 1:280) with output speeds of approx. 200 and 42 rpm respectfully in (2) switchable modes, plus a 3VDC motor so you can use the finished product to drive pulleys, wheels, fans, science projects, or maybe a toy car. Requires only regular household tools to assemble it, and has (4) adjustable mounting brackets. Overall size when finished is 2-7/8" x 3-1/2" x 5-8" high.
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93460 GEAR BOX KIT |
Ten dozen, to be exact. Our package of 120 radial lead electrolytic capacitors comprises: (15) each of 1uF, 2.2uF, 4.7uF, 10uF, and 22uF at 50V, (15) each of 47uF and 100uF at 25V, and (5) each at 220uF, 470uF and 1000uF at 25V. From Velleman®.
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93493 120 CAPACITORS |
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