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🔬 Stay sharp, stay calibrated — precision that powers your growth.
Bluelab’s 500 ml calibration solutions for pH 4.0, 7.0, and 2.77 EC provide essential, pre-mixed liquids designed to maintain the accuracy of your pH and EC meters. Ideal for hydroponics and water quality monitoring, these solutions ensure consistent, reliable readings that protect plant health and optimize nutrient balance. Trusted by professionals and backed by excellent reviews, they simplify routine meter maintenance with long-lasting bottles for multiple calibrations.
| ASIN | B07BRBJD77 |
| Best Sellers Rank | #57,206 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #10 in Electrolyte Solutions |
| Brand | Bluelab |
| Brand Name | Bluelab |
| Container Type | Bottle |
| Customer Reviews | 4.8 out of 5 stars 337 Reviews |
| Included Components | 1 Bluelab pH 4.0 Calibration Solution |
| Item Form | Liquid |
| Item Volume | 500 ml |
| Manufacturer | Bluelab |
| Model Number | BSL47C50AT |
| Package Information | Bottle |
| Part Number | BSL47C50AT |
| UPC | 680666717124 |
| Unit Count | 50.7 Fluid Ounces |
| Volume | 500 ml |
M**S
Gotta have it.
If your using a ph meter or dissolved solids meter this is a must have. Not cheap but accurate. If you want your grow to turn out right you need accurate info on your water ph and fertilizer strength. Don’t think you can compromise here. Not cheap but reliable.
T**R
Calibration fluids
Exactly what I expected
E**5
Lighting fast shipping!
Exactly as described sealed bottles and Very fast shipping! Couldn't be more satisfied with purchase.
T**H
Fast shipping
Got these super quick! Haven’t used them yet but they look as expected.
J**E
Works grea
Works great when calibrating.
B**E
Very pleased
Very good
M**K
Not a quick shipper as promised
Do believe the shipping... it really does take that long. Packaged up soon after order but took week to actually get to carrier and shipped. Not a big deal. Why lie though?
P**I
Not what you get
I bought this product and never received ppm solution to cal. It I got the ph cal. Not the conductivity 1 tho messaged and never responded back what a joke
C**L
Good to go
Showed up on time and exactly what I ordered
R**E
Fast delivery
All good
K**Y
Good value
This is a good deal and I will purchase again
L**S
Awesome stuff
Everything sealed and new, just as described. Make sure to read labels and instructions printed on each bottle. Would recommend to anyone (using with non bluelab equipment and its working great)
N**N
Ph calibration
Un peu plus dispendieux mais livré à la porte !👌
Trustpilot
1 day ago
2 weeks ago