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Gardeners can conveniently test their moisture, light, and pH levels with the handy ActiveAir 3-Way Meter. Moisture readings register on a scale of 0 (dry) to 10 (moist), light readings range from 0 (low light) to 2000 (very strong light), and pH readings between pH 0 (acidic) and pH 10 (basic) are represented. The durable, easy-to-read tester is suitable for indoors or out and needs no batteries to operate.

DO NOT LEAVE IN SOIL. CLEAN PRONGS AFTER EACH USE.

The Checker supplies you with fast and accurate readings from 0.00 to 14.00 pH with a resolution of 0.01 pH.

This compact tester features a large easy-to-read LCD and a simple to perform 2-point calibration.

The Checker is fast, accurate, lightweight and with 3000 hours of battery life, you don't have to worry about frequent battery replacement.

FEATURES

• Measures pH and Temperature
• Auto-ranging three point calibration with digital fine tuning
• Includes 4 pH buffer solution in a sponge embedded in a clear cap, so you can see if it's dried up
• Waterproof housing
• Simultaneous temperature display
• Measurement Range: 0-14 pH
• Digital Calibration (push button)
• Auto-off function, data-hold function and low-battery indicator.
• Display: large and easy-to-read LCD screen includes simultaneous temperature reading.
• Factory Calibrated: The PH-200 meter is three-point factory calibrated to 4, 7, and 10 pH. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver.
• Includes a cap, batteries, and lanyard

SPECIFICATIONS

• pH Range: 0 - 14
• Temperature Range: 0-80 C; 32-176 F
• Resolution: 0.01 pH; Temperature resolution is 0.1 C/F
• Accuracy: +/- 0.02 pH
• Calibration: Digital calibration by push button.
• Electrode: Replaceable glass sensor and reference tube electrodes
• Housing: Waterproof (submersible; floats)
• Power source: 3 x 1.5V button cell batteries (included)
• Dimensions: 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches)
• Weight without case: 96.4 g (3.4 oz)

To maximize plant growth, the pH content of your nutrients should be slightly acidic. Experienced growers consider the ideal pH for most crops to fall between 5.5 and 6.5. Users of General Hydroponics nutrient products generally do not experience problems maintaining the proper pH range because our formulas are pH buffered. However, some important exceptions do exist. Acid content can reach unacceptable levels when nutrient solutions are mixed with poor quality water, or pH unstable media - such as rock wool and gravel products - are used, and when high plant growth rates destabilize the nutrient mix due to rapid nutrient absorption by the crop.

pH Up: Base formulated using Potassium Hydroxide and Potassium Carbonate. Add a little at a time if your nutrient pH is too low in order to raise the pH to the proper level.

To maximize plant growth, the pH content of your nutrients should be slightly acidic. Experienced growers consider the ideal pH for most crops to fall between 5.5 and 6.5. Users of General Hydroponics nutrient products generally do not experience problems maintaining the proper pH range because our formulas are pH buffered. However, some important exceptions do exist. Acid content can reach unacceptable levels when nutrient solutions are mixed with poor quality water, or pH unstable media - such as rock wool and gravel products - are used, and when high plant growth rates destabilize the nutrient mix due to rapid nutrient absorption by the crop.

pH Down: Acid formulated using food grade Phosphoric acid. Just add a little at a time if your nutrient pH is too high in order to lower the pH to the proper level.