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ECO ENTERPRISES Headquarters: 1240 NE 175th St. Suite B Shoreline, WA 98155 1-800-426-6937 Email: ecoenter@aol.com |
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| These waterproof pH Pens are made for hydroponics. Range is -2.00 to 16.0 pH (full range) and accuracy is plus/minus .2 pH. Automatic calibration (1 or 2 points) and temperature compensation. The pH 5 models (pH and PPM models) have additional features such as replaceable electodes, stability indicators and automatic calibration. This waterproof PPM Pen (parts per million) is recommended for hydroponic and rockwool users. Range is 0 - 2000 PPM. Automatic calibration and temperature compensation. |
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| Manufacturer: Hanna | ||||||||||||||||||||
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