Hydrovolt Hydrometer/Battery Tester The Hydrovolt battery tester is a heavy-duty, chemical-resistant hydrometer which is direct-reading and accurate at all electrolyte temperatures. No other hydrometer is more accurate. Its advanced design incorporates important practical features which simplify servicing as never before. FEATURES: * Unexcelled temperature compensation and measuring accuracy * Handy, compact size for use with hard-to-get-at batteries * Large, easy-to-read scale with quick-check colored sectors * Readings independent of vertical positioning of instrument * Fast, bubble-free intake of fluid sample * Automatic, air-lock prevents fluid loss and air bleed * Sturdy, shock-resistant materials, non-corrosive throughout How to Use: * First, wear eye protection. * While holding the instrument more or less upright, press the bulb to fill the measuring chamber completely * Read off the battery-acid density shown by the indicator
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