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Sensor probes do NOT last forever and will eventually fail. This pH Electrode is gel filled making it maintenance free! Best of all, it’s designed for use with ALL Bluelab pens, meters and monitors.
• Fully waterproof, submersible to 10 meters
• Quality BNC connection
• Tough polypropylene barrel
• Heavy duty thick wall glass stem
• Warranty: 6-months
Instruction Manual (PDF)
It is advised that probes be replaced every 12 months, especially when measuring in hydroponic solutions.