Always have fresh solutions on hand

We have pH buffer solutions, pH electrode storage solutions, electrode cleaning solutions, lab buffer kits, and electrode filling solutions for virtually every application. All Thermo Scientific™ Orion™ pH lab buffers and solutions are traceable to NIST reference materials.  

Our pH buffer solutions come in a variety of sizes to match all applications and uses. Choose from 15 mL single-use pouches to standard pint bottles to large-volume 19 L cubitainers.

Download pH Handbook ›    pH buffer values vs. temperature ›

Popular pH buffers and solutions
Featured pH buffers and solutions categories

Our pH buffers and test kits include pH buffer bottles, pH buffer cubitainers, individual use pouches, alkalinity test kits, pH buffer kits, and more.

Our high-quality pH electrode fill solutions work in conjunction with Thermo Scientific™ Orion™ ROSS™, ROSS™ Ultra™, and other Orion™ pH electrodes.



Restore proper electrode performance and prolong electrode life using Thermo Scientific™ Orion™ pH Electrode Cleaning and Storage Solutions.

Eliminate concerns with mixing reagents, hazardous chemical exposure, or disposal. Our ORP standards are premixed, without sacrificing stability. 


Knowledge Base: Certificates of Analysis and SDS for Orion, ROSS, AQUAfast, AquaMate and AquaSensors products.