Bluelab Guardian Monitor Size:Replacement Probe Choose from six different 100-foot

Choose from six different 100-foot sizes

State-of-the-art electronics throughout

Optimal spray coverage is achieved with precise mister placement

Effective as a final flush to clean growing media

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Bluelab Guardian Monitor Size:Replacement Probe Choose from six different 100-footAdjustable brightness display. Large easy to read, plant safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and temperature. Silent alarm for both high and low settings. Settings retained when power lost (non volatile memory). Temperature compensation. An international power supply. Water resistant design. 2 year Bluelab Guarantee (6 months on