Bluelab EC Pen - Temperature Compensated Digital EC Tester Bulky Passive cooling (fanless) versus competitor

Passive cooling (fanless) versus competitor models that require active ventilation

and it doesn't need to

RadAir is flexible enough to work across different extraction setups:

There's no getting around this

5ml per litre of water to your nutrient reservoir

Bluelab EC Pen - Temperature Compensated Digital EC Tester Bulky Passive cooling (fanless) versus competitorBluelab EC Pen Temperature Compensated Digital EC Tester Best for: growers who want a fast, single purpose conductivity check on their nutrient solution without carrying a full combo meter. Our thoughts If pH isn't your worry and you just want to know your feed strength is on point, this is the pen for the job. It's simple, it's quick, and Bluelab's build quality means it'll survive being dunked in a reservoir daily for years rather than dying after