A hypochlorite cell voltage monitoring device for monitoring the voltage across a hypochlorite cell. The hypochlorite cell voltage monitoring device includes a housing, a clamp having a first clamp ring and a second clamp ring opposite the first clamp ring, and digital direct current (DC) voltmeter disposed in the housing. The first clamp ring couples to an anode side of the hypochlorite cell and the second clamp ring couples to a cathode side of the hypochlorite cell. The voltage across the hypochlorite cell may be monitored using the digital direct current (DC) voltmeter.

A device for testing a voltage level in an electrical terminal cavity including a testing body and a probe for contacting the electrical terminal cavity. The probe includes a tip portion having a first cross-sectional area, a base portion having a second cross-sectional area, and an intermediate portion extending from the tip portion to the base portion having a third cross-sectional area. The first cross-sectional area is smaller than the third cross-sectional area, the third cross-sectional area is smaller than the second cross-sectional area, and the intermediate portion is concentric with the tip portion and the base portion. An axis extends between a center of the tip portion, a center of the intermediate portion, a center of the base portion, and a center of the testing body. The device also includes a circuit operatively coupled with the probe to sense the voltage level in the electrical terminal cavity.