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.
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Looks great, comfortable to wear, love that the buttons are the same color as the shirt, easy to wash, appears to be durably made. Significantly exceeded expectations (I ordered 2 more). 4 stars instead of 5 because it’s possible to move your arms in a way that makes the shirt slightly tight in the bicep area, but that’s unnoticeable almost all of the time (and minor anyway). Note: even after a couple of wash - wear - wash cycles, there were creases along the same places as where the shirt was shipped; this was easily remedied by a quick iron on a low setting and I think reflects that it is quite resistant to wrinkles.

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Reviewed in the United States on February 26, 2025

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Jeff Morie

Phoenix, US

★★★★★ 3

Nice shirt.

Size: Large, Color: Pacifico

Decent shirt but not as soft as you would think.

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Reviewed in the United States on May 14, 2026

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