This is a 7-n-1 easy to use digital multimeter. This multimeter is used to measure voltage, current, do continuity checks, and more on the tanks.
Features:
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AC Voltage: 0-250V Max
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DC Voltage: 200mV-250V Max
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DC Current: 200uA-5A
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Frequency: 45Hz to 450Hz
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Resistance: 200 ohms - 2000k ohms
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9V internal battery included
Having issues with a battery or connection? This multimeter will help diagnose most electrical problems on the tanks. A continuity check (making sure there are no broken cables) can easily spot a broken cable in the tank and with a voltage test you can check to see if your batteries need maintenance/charge.