Test Tube pH Pens

Marsoni

M251S

$63.25

Get it in 3 business days with 1 day shipping. Friday, May 29

Test Tube pH PensFits standard test tubes 16 x 50 mm or larger. Highly stable and accurate readings with a large LCD display. Designed for simple one hand operation. Automatically calibrates to pH 4, 7 and 10 buffers and can be adjusted to recognize some other non standard buffers as well. Features hold function, and auto power off with low battery indicator. General Purpose Glass Probe: EPA compliant for labs and wine Penetration Probe: for food & soil Flat Tip

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Fast: 2-3 business days
Express: 1-2 business days

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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I am so stoked about this purchase. Our outdoor lighting situation was terrible- motion-activated lights that cut out after ten minutes and zero power outlets outside. This umbrella light exceeded every expectation. Three brightness modes, all bright enough to actually see what you’re doing — no more squinting while socializing, reading, or attempting to do “work” outside. Cordless, easy to install, and long lasting. If you consistently forget to turn them off when you're done, you'll get about a week and a half from the batteries on the lowest setting.

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Reviewed in the United States on October 15, 2025

Verified Purchase

gail

Alexandria, US

★★★★★ 5

Let there be light!

Easy to assemble. Lights are very bright. Very sturdy even with terrible storms it's still working and bright

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Reviewed in the United States on January 27, 2026

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Tiffany

Birmingham, US

★★★★★ 3

Okay

I like that it fits my umbrella well, hinges open for easy application and removal, and that it has enough light for us to see our food at night. I do not like that half of the outer lights do not work part of the time until I take out the batteries and swap them around. Fine enough for the price, not worth the hassle of returning.

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Reviewed in the United States on May 10, 2025

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Flnative

Phoenix, US

★★★★★ 5

Perfect!

Lightweight and easy to use! Love the three light settings.

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Reviewed in the United States on April 27, 2026