HM Digital HydroMaster Continuous pH/EC/TDS/Temp Monitor Model HM-500

HM Digital HydroMaster Continuous pH/EC/TDS/Temp Monitor Model HM-500

Marsoni

M251S

$179.50

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

HM Digital HydroMaster Continuous pH/EC/TDS/Temp Monitor Model HM-500HydroMaster Digital tester makes monitoring water easier than ever by reading the levels that matter most and providing accurate readings that you can depend on. Continuous pH EC TDS Temp monitor with rechargeable battery. Portable, wall mount or benchtop use. Tests pH at a range of 014 pH, temperatures from 30F176F, TDS from 09999 ppm and EC from 09999 S. Stores up to 20 measurement readings, so you can monitor changes over time. LCD touch type

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We offer a 30-day return/exchange service after receiving.
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Very good product for the price - the front brushes wear fast compared to the original Eufy’s but for the value you do get a lot of product. So only 4 stars but just for the brushes “appearing to not last as long and bend but the buy is worth the extras. The filters look and work identical to the OEM. Good stuff - thanks!

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Reviewed in the United States on December 25, 2025

Verified Purchase

Eduardo

Lake Worth, US

★★★★★ 5

Perfect fit, 11s running like new!

Style: with Pre-Filter

All parts fit perfectly. My vacuum lasts about 20 min longer since the filter isn’t clogging it. Also, replacing the spinning brush quieted it down significantly, it sounds like new again.

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Reviewed in the United States on May 20, 2026

Verified Purchase

kathp

Bozeman, US

★★★★★ 5

Replacement parts

Style: with Pre-Filter

Was so happy to find the replacement parts for my eufy robovac. Really makes a big difference in vac performance.

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Reviewed in the United States on April 5, 2026

Verified Purchase

Mr. Joseph

Belleville, US

★★★★★ 5

Everything you need to do full maintence of your robot vaccum

Style: C20 Parts * 19pcs

this kit truly includes everything you need to do full maintenance of your eufy C20 vacuum. From replacement brushes and filters to cleaning tools and essential spare parts, it covers all the basics to keep your vacuum running like new. The components are well-made and fit perfectly, making installation quick and hassle-free. Regular maintenance becomes much easier when everything you need is in one convenient package. It saves time, extends the life of your vacuum, and helps maintain strong suction and cleaning performance. Highly recommended for routine upkeep and long-term performance.

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Reviewed in the United States on February 11, 2026

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Leonardo C.

Lake Worth, US

★★★★★ 5

Muy bueno

Style: C20 Parts * 19pcs

Muy bueno lo recomiendo

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Reviewed in the United States on May 11, 2026