Call us at 1-888-826-6342.
Pre-mixed pH Calibration Solutions
4.00 pH buffer solution 500 mL (1 pint) bottle
Added to Your Shopping Cart
Configuration complete.
Please add to cart to keep it or exit the configuration
Please add to cart to keep it or exit the configuration
Failed to Save Configurations, Click on Configure Button Start Again
- 1 Year Shelf Life
- Pre-Mixed pH Solutions
- Two Bottle Sizes Available
- Standardized Against NIST Certified Sample
PHA-4 Model Options
View all modelsEdit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.
*Highlighted options are not compatible. Please select a different combination.
Solution Value
Volume
Formulated to provide precise pH determinations, these buffer solutions which are standardized against N.I.S.T.-certified reference samples, are ideal for calibrating electrodes and pH meters. The buffers are color-coded to avoid error and accurate to within ±0.01 pH at 25°C (77°F). Each buffer contains a preservative/mold inhibitor and a shrink-sealed cap to prevent contamination and leakage. Temperature compensation charts are included with each buffer solution. The shelf life of the buffer solutions are 1 Year.
Rated 4 out of
5
by
christy from
pH buffers
I bought pH buffers in 1 gallon jugs. Good value. Will buy again.
Date published: 2016-06-30
Rated 5 out of
5
by
Anonymous from
The perfect vendor
Great product and customer service. The perfect vendor
Date published: 2023-08-12
Rated 5 out of
5
by
Fehr Graham from
Great product
This pH standard is perfect and is available at an affordable cost
Date published: 2023-04-19
Rated 5 out of
5
by
Fehr Graham from
Quality and Value rolled into one.
quality standard at a good value. We have used this standard for years.
Date published: 2023-04-19
Rated 4 out of
5
by
Jordan from
Great Product DOESN'T COME IN BOTTLES
Ph solution worked as advertised but was disappointed that the solution came in UN-resealable bags. I was under the impression they were in bottles.
Date published: 2020-06-13
Rated 5 out of
5
by
Sara from
PH Buffer Solution
Good Customer service, On time Delivery, Over all no complaints, Good Business! Thank You!
Date published: 2020-04-20
Rated 4 out of
5
by
nkrasco from
Great Samples
We bought these pH buffers solutions for our internal R&D use. So far, they are exactly what we needed. Working very well!
Date published: 2019-04-16
Rated 5 out of
5
by
DirtCamp Brewering from
Great Service
Easy online ordering. Prompt service and reasonable price.
Date published: 2018-05-29
How should this solution be disposed of?
Thank you for your inquiry. Standard buffer solutions are comprised of salts and can be drained into a sink and flushed with copious amount water afterwards.
Date published: 2023-05-05
if i'm need the NIST traceable certificate, where i can download this documents?
Thank you for your inquiry. If you had purchased the buffer solution with a NIST certificate, please email sales@omega.com and a Customer Care representative will able to email a copy of the cert.
Date published: 2020-09-09
If buffers are susceptible to contamination, how long are they good for after opening the container?
pH buffer solutions have 1 year shelf life. You should follow the expiration date on the bottle.
Date published: 2020-04-13
Does the Standard Certificate Type provide a NIST traceable certificate or do I have to select the CAL Certification?
Yes
Date published: 2019-10-31