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Waterproof Dissolved Oxygen Meter Pen

Marsoni M251S
Sale price$177.00
Pay 4 payments of $44.25 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Waterproof Dissolved Oxygen Meter PenMeasures dissolved oxygen to determine water quality in environmental testing, labs, industrial and municipal wastewater, aquariums and fish hatcheries. Designed for simple one hand operation with automatic temperature compensation and calibration to air. The polarographic probe has a built in temperature sensor and easy to replace pop off probe heads. Simultaneously displays dissolved oxygen and temperature readings. Also holds readings and recalls
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
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4.8 ★★★★★
Based on 1666 reviews
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dawn b.
Houston, US
★★★★★ 5
Well-made!
Size: Large, Color: Black
Son-in-law looked very handsome in this their wedding day!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026
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Ivegotconfidence
Bozeman, US
★★★★★ 5
Perfect
Size: X-Large, Color: Light Grey
True Size. Fit perfectly. 5’10 200. Ordered an XL. Good quality and worth the money
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Reviewed in the United States on January 18, 2026
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Verified Purchase
Elaine Andrew
Charlottesville, US
★★★★★ 5
I would buy again!
Size: Large, Color: Burgundy
I bought this set for my son's high school graduation back in May! Came quickly, and it was exactly what we needed. It fit as described, and looked very nice during the ceremony, along w his cap n gown. Well worth the $ spent!
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Reviewed in the United States on December 10, 2025
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April Russell
Alexandria, US
★★★★★ 5
Nice
Size: Medium, Color: White
Fit well for my son, he’s 6ft and 170
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Reviewed in the United States on January 22, 2026
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Verified Purchase
Catherine Smith'Dent
Los Angeles, US
★★★★★ 5
Love it
Size: X-Large, Color: Mint Green
Love the look, fits perfectly, great material.
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Reviewed in the United States on May 15, 2026

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