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BLUELAB - IN LINE PH PROBE
BLUELAB - IN LINE PH PROBE
BLUELAB - IN LINE PH PROBE
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BLUELAB - IN LINE PH PROBE

Marsoni M251S
Sale price$118.30
Pay 4 payments of $29.57 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
BLUELAB - IN LINE PH PROBEReplacement Probe for Bluelab Guardian Monitor Continuous pH Meter If you own a Bluelab Guardian Monitor and need a replacement probe for the continuous pH meter, you've come to the right place. pH probes can degrade over time, and with regular use, it's normal for them to need replacement. However, with proper care and maintenance, you can extend the life of your probe. The Bluelab replacement probe is specifically designed for the Guardian Monitor
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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.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 901 reviews
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Product Reviews
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Verified Purchase
Monchita
Houston, US
★★★★★ 5
Exelente
Size: For 85-300 HP
Exelente
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
D
Verified Purchase
Dave Murray
Louisville, US
★★★★★ 5
Good as new
Size: Package Dimensions ‎6.02 x 4.02 x 2.05 inches
Fitment was great and works as it should. Good quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2025
K
Verified Purchase
Kenny
Massapequa, US
★★★★★ 3
Incorrect motor listed. Far smaller impeller than what's in the 6 horse johnson.
Size: For 5.5HP 6HP 7.5HP
It seems to be of good quality. However it does not fit a 6 horse johnson as it states. Therefore it will not pump water or function for my purposes. It was a waste of money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 15, 2025
S
Verified Purchase
Sylvia E.
Waukegan, US
★★★★★ 5
OE Quality Part
Worked perfectly. Everything needed is there.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
N
Verified Purchase
nastyfishy
Pawtucket, US
★★★★★ 5
10 out of 10
The must do service package. This is a "fits multiple" kit so youll have some extras. The kit also includes the lower unit gear oil seals, which is awesome. I always trust quicksilver to be durable and a great value for the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2026

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