Measures Oxygen Reduction Potential (ORP) or, available oxygen, in soil and foliar sprays. Oxygen availability is crucial to the plant's uptake ability. Based on ORP reading, available oxygen can be easily adjusted using hydrogen peroxide. This definitely enhances the effectiveness of foliar feeds by increasing plant ability to absorb them. ORP and pH readings together provide an rH value which used to diagnose the biological condition of your soil. A soil rH below 25 indicates low oxygen, limited biological activity, and a consequent lack of humus-building. A soil rH over 29 indicates too much oxygen, resulting in oxidation of organic material and loss of carbon to the atmosphere, limiting nutrient availability to the crop. Waterproof, floatable. Replaceable, double-junction electrode is ideal for dirty water, heavy metals, sulfides, and organics. Three-segment battery life indicator. Batteries and complete instructions included. Calibration not necessary to operate unit.
7.25 x 2.5 x 2 inches.