Protein Gaurd(TM) pH electrode is guaranteed against damage from exposure to protein for 6 months. If this electrode malfunctions due to protein within 6 months of purchase, we will replace it free of charge.
Measuring pH of samples containing proteins such as supernate from cell culture, urine, serum, and tissue homogenates has always been a challenge because the protein rich samples tend to clog up the electrode. Our Protein Guard(TM) clog free pH electrode has a unique design that includes a retractable spring-loaded sleeve to easily renew the reference junction and unclog the electrode.
Protein Guard(TM) Flat Surface Electrode is available for surface samples which contain proteins.