All Brands
- Pall
- Parr Instrument
- Paul N Gardner Company
- PDS
- Perkin Elmer
- PerkinElmer
- Petroleum Analyzer Company
- Pharmco-Aaper
- Phenomenex
- Phillips
- Pickering Laboratories
- PIP
- Plas Lab Inc™
- Polartech
- Polarware
- Poltex
- Polysci
- Polyscience
- Porvair
- Precision Glass Blowing
- Precision System Science
- Pro Scientific
- Prop
- Puritan
- Purus