1-800-663-4209 | Your feedback matters, take a quick survey Website Feedback
- Home
- See Automation, Control & Monitoring
- See Accessories
- Pre-mixed pH Calibration Solutions
We noticed you are from . Visit your local site for regional offers and live support.

PHA-SERIES
Pre-mixed pH Calibration Solutions
Models In Stock
- 1 Year Shelf Life
- Pre-Mixed pH Solutions
- Two Bottle Sizes Available
- Standardized Against NIST Certified Sample
PHA-SERIES
From
$
19.62
Models In Stock

Product Overview
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.
Show Ratings & Reviews
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 4 out of
5
by
Ian S from
best PH solution
Works really well, would never consider something else.
Date published: 2025-03-24
Rated 5 out of
5
by
Everett from
Quick shippment
Works as expected, although it was a partial order.
Date published: 2024-06-17
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
- y_2025, m_4, d_3, h_6
- bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
- cp_1, bvpage1
- co_hasreviews, tv_0, tr_14
- loc_en_US, sid_PHA-10, prod, sort_[SortEntry(order=HELPFULNESS, direction=DESCENDING), SortEntry(order=POSITIVE_FEEDBACK, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
- clientName_omega
- bvseo_sdk, java_sdk, bvseo-4.0.0
- CLOUD, getReviews, 2ms
- REVIEWS, PRODUCT
if i'm need the NIST traceable certificate, where i can download this documents?
Asked by: rachel82
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.
Answered by: JC ENGR
Date published: 2020-09-09
If buffers are susceptible to contamination, how long are they good for after opening the container?
Asked by: Brent O
pH buffer solutions have 1 year shelf life. You should follow the expiration date on the bottle.
Answered by: SAE HPO
Date published: 2020-04-13
Does the Standard Certificate Type provide a NIST traceable certificate or do I have to select the CAL Certification?
Asked by: Markg
Yes
Answered by: Jacaob sum
Date published: 2019-10-31
How should this solution be disposed of?
Asked by: TommyWA
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.
Answered by: Application Engineer JC
Date published: 2023-10-27
- y_2025, m_4, d_3, h_6CST
- bvseo_bulk, prod_bvqa, vn_bulk_3.0.42
- cp_1, bvpage1
- co_hasquestionsanswers, tq_4
- loc_en_US, sid_PHA-10, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
- clientName_omega
- bvseo_sdk, java_sdk, bvseo-4.0.0
- CLOUD, getContent, 45ms
- QUESTIONS, PRODUCT