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Quiet and fan-cooled
Connect an external lockout sensor (eg float switch)
Connect external switches to your Bluelab Pro Controller for a complete dosing solution
Get everything you need to keep your Bluelab OnePen accurate
Bluelab ORP Meter halloween25 Quiet and fan-cooledMonitor Oxidation Reduction Potential (ORP) to track solution quality, disinfecting power, and sanitation throughout the growing cycle. Compact, handheld design for convenient use Bright, easy to read backlit display Replaceable Bluelab ORP Probe (with BNC connection) No ORP probe calibration required KCl filled probe cap to keep the probe hydrated 2 metre 6. 6ft cable for measuring in hard to reach locations Dual compatibility allows optional use of