


550135 Rola-Chem Heavy Duty pH Probe with 8' Cable
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
550135 Rola-Chem Heavy Duty pH Probe with 8' CableMaintain pinpoint pH accuracy in your pool or spa with the Rola Chem pH Heavy Duty Probe 550135. This 8 foot sensor is purpose built for water treatment systems that demand unwavering measurement precision. Robust materials throughout the construction ensure it holds up under continuous exposure to treated water, delivering season after season of dependable service. Designed to pair directly with Rola Chem digital controllers, this probe is a
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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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★★★★★ 1
Use locktight red or blue
Product comes loose frequently and its extremely annoying to tighten it takes forever
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Reviewed in the United States on November 4, 2025
★★★★★ 2
Metal tab blocks magnetic charging
The set screws are too small and they do not have an adapter that fits the magnet charging rings on the newer phones
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Reviewed in the United States on October 4, 2025
★★★★★ 5
My favorite BMW car mount.
This is my favorite mount for BMWs. I have them on two cars (X4M and a 328), but I always modify the mount and install a metal ball (purchased here on Amazon) so I can mount an ESR Wireless charger.
This combo is the best charging mount and system I have ever tried
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Reviewed in the United States on November 17, 2023
★★★★★ 5
sturdy mount nice fit
fit nicely and magnet is strong using the included metal disc to put inside phone case. was missing instructions but figured it out. you have to screw in the small set screws until it is snug. using a longer hex key made it easier.
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Reviewed in the United States on August 10, 2023
★★★★★ 5
Fits like a Glove!
Be patient screwing the 4 screws lol, but other than that. It feels heavy duty and fit like a glove. I LOVE it!!
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Reviewed in the United States on April 4, 2024