Real-time detection and alerting for swimming pool safety includes obtaining signals from sensor devices installed in a swimming pool area having a swimming pool, ascertaining, based on the obtained signals, that an individual has entered the swimming pool and identifying, based on the obtained signals, characteristics of the individual who has entered the swimming pool, determining whether to raise an alert about the individual having entered the swimming pool, the determining being based at least in part on location of one or more other individuals relative to the swimming pool area and on checking pre-configured parameters for alerting, and performing processing based on the determining whether to raise an alert.

A device for detecting stray electrical currents in fluid mediums comprises at least two probes for partially disposing in a fluid medium and a control unit. The control unit comprises at least one analog-to-digital signal converter in electrical communication with at least one of the probes, at least one audio-visual alarm, and a processor operably coupled to the at least one converter and to the at least one audio-visual alarm. The processor is operable to measure an electrical potential difference between the two probes, to analyze a plurality of the measurements to determine whether a predetermined frequency is present, and to transmit an alert signal to the audio-visual alarm if the predetermined frequency is present. Advantageously, by monitoring for the frequency, the device more consistently and more reliably detects the presence of stray alternating currents.

A shock awareness system including a shock detector for measuring an electrical condition in a body of water and a remote station in communication with the shock detector with the shock awareness system displaying a measured electrical condition in the body of water in relation to a known hazardous electrical condition in the body of water to enable an operator to determine a level of danger in a body of water.

Real-time detection and alerting for swimming pool safety includes obtaining signals from sensor devices installed in a swimming pool area having a swimming pool, ascertaining, based on the obtained signals, that an individual has entered the swimming pool and identifying, based on the obtained signals, characteristics of the individual who has entered the swimming pool, determining whether to raise an alert about the individual having entered the swimming pool, the determining being based at least in part on location of one or more other individuals relative to the swimming pool area and on checking pre-configured parameters for alerting, and performing processing based on the determining whether to raise an alert.

A voltage detection system for detecting a stray voltage in pool water within a pool caused by an electrical fixture integral with a pool wall of the pool. The system comprises a pair of elongate conductive elements, with one of the elongate conductive elements having a detector electrode end and a terminal end, and with the other elongate conductive element having a reference electrode end and a terminal end. The detector electrode end is positioned adjacent to the electrical fixture and the reference electrode end is positioned on an opposite side of the pool and preferably a maximum distance from the detector electrode end. And, the terminal ends are connected to a microprocessor for determining if a voltage between the detector electrode end and reference electrode end is greater than a predetermined threshold voltage.

A hand held probe (200) for detecting voltage in a body of water includes voltage sensors (VS) installed in a probe head (204) with each sensor separately sensing a voltage present in the water and supplying an electrical output signal representative of the voltage level. A processor (206) processes the signals and produces an output representing a voltage gradient, a resultant electrical current, and a direction of current flow. A multiplexer (214) interposed between the sensors and processor transmits signals from the sensors to the processor in a predetermined sequence. Results of the processing including any voltage gradient, the resultant electrical current, and the direction of current flow are displayed and this information is used to determine if a currently dangerous or potentially dangerous condition exists in the water, and if a voltage is present in the water, its source.

A shock awareness system including a shock detector for measuring an electrical condtion in a body of water and a remote station in communication with the shock detector with the shock awareness system displaying a measured electrical condtion in the body of water in relation to a known hazardous electrical condtion in the body of water to enable an operator to determine a level of danger in a body of water.

A shock detector for determining the existence of a voltage gradient in a body of water, which may be remote from a structure and providing an alarm when the voltage gradient comprises a hazardous electrical condition that could injure or kill are person coming into contact with the body of water.

A swimming-pool entrance detector (10a), including: means (50) for disposing the swimming-pool entrance detector (10a) in water of a swimming pool (12) above the ground (56) thereof; and a first optical sensor (30), for receiving optical rays (40a1, 40a2), thereby receipt of the optical rays (40a1, 40a2) may indicate presence of at least one opening (14a) in a cover (18) of the swimming pool (12).

A shock detector for determining the existence of a voltage gradient in a body of water, which may be remote from a structure and providing an alarm when the voltage gradient comprises a hazardous electrical condition that could injure or kill are person coming into contact with the body of water.