Labnox Orp Buffer Solution 256 mv and 478 mv,Orp Calibration Solution 200 ml Solution Basin  (Pack of 1)

Using a high-grade buffer to calibrate your meter before each use is the only tried-and-tested way to get accurate results every time. ORP calibration solutions, also called ORP buffers, are an essential tool when measuring ORP with a ORP meter and electrode. Our Labnox ORP buffer is much more stable and is resistant to change. Using a high-grade buffer to calibrate your meter before each use is the only tried-and-tested way to get accurate results every time.