InLab OptiOx Maintenance free; easy to use; no stirring required Store dry Shaft is made of plastic; check chemical compatibility with your local representative Needs to be calibrated before use Daily calibration is recommended Two-point calibration using zero oxygen tablets suggested for less than 1 mg/L or less than 5% oxygen Replace cap every 12 months (whether in use or not in use); indicated on meter with a pie chart icon Zero oxygen tablets: 51300140 OptiOx replacement cap: 51344630 (first replacement cap included with sensor purchase) OptiOx calibration tube: 51344631 (calibration tube included with sensor purchase) OptiOx protective guard: 51344632 (protective guard included with sensor purchase) Compatible with METTLER TOLEDO SevenExcellence benchtop, Seven2Go and SevenGo portable InLab 605 Chemically resistant (reach out to your local representative about chemical compatibility) Store dry The sensor must be polarized for 6 hours prior to usage Gentle stirring is required during calibration and measurement Needs to be calibrated before use Daily calibration is recommended The membrane body needs to be replaced every 3-12 months Electrolyte needs to be changed when the membrane body is changed (see part number below) Membrane Replacement Kit (3 membrane bodies, 25 ml electrolyte): 51340293 Electrolyte: 51340294 Sealing kit: 51340295 Calibration bottle: 51340296 uMix Magnetic Stirrer: 30040000 Compatible with METTLER TOLEDO SevenExcellence benchtop, Seven2Go and SevenGo portable