TPS, ORP Standard - Zobell, 231 mV, Part A & B, 2x 100ml

The TPS Zobell ORP Standard is a redox calibration solution for use with TPS instruments. It provides a reference potential of 229 mV ± 15 mV at 25°C. The kit includes 100 mL Part A ORP Standard, 100 mL Part B ORP Standard and an eyedropper for convenient application.