Stopper cV\black PEEK\conical Shaft\central+peripheral 2.3 mm Port: for potentiometric Orobors MultiSensor applications (NO, H2S, H2O2); 1 additional port (2.3 mm); central titration port; conical bottom; including Volume-calibration Ring cV (A or B); 2 mounted O-rings, with 8 spare O-rings (O-ring cV\Viton®\12.5×1 mm).
Two stoppers are included in the NO-Module.