


HM Digital HydroMaster Continuous pH/EC/TDS/Temp Monitor Model HM-500
Marsoni
M251S
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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Your HM Digital HydroMaster Continuous pH/EC/TDS/Temp Monitor Model HM-500 orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- 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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★★★★★ 5
Wife loves it
Makes a great gift
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Reviewed in the United States on June 14, 2025
★★★★★ 5
Keeps great time
This is actually prettier than I thought it would be and I am tough on everything I wear. Never know what the day will entail, so when I clean it at the end of the day, it’s pretty shine comes right back.
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Reviewed in the United States on May 19, 2024
★★★★★ 3
Very hard to see the HANDS, but pretty
Very pretty and I didn't have to remove links. Hard to see the hands unless you angle it in the light. I'm not sure if I'll keep it. I'll give it some time ..lol and see how it goes before Amazon's 30 day policy.
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Reviewed in the United States on July 12, 2025
★★★★★ 3
just makes it around my large wrist - but very pretty
If you also have a large wrist like I do, well ... try it out. Bought it to look delicate and pretty at my son's wedding, to match color of gown. Which it does.
Side note: the hands are cobalt blue, for some reason! But you'd have to look up close to discover that. It doesn't take away from the overall look I wanted.
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Reviewed in the United States on July 8, 2023
★★★★★ 2
DIdn't Work
When I got the watch, it wasn't running, so I took it to a local jewelry store and had the battery replaced, which cost another $20+ and it still wouldn't run.
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Reviewed in the United States on September 18, 2023