Abstract: A robotic holiday testing apparatus for detecting and marking holidays in the protective coating atop a metal base plate of a storage tank, including: a. a vehicle, b. a power drive unit selectively coupled to a first set of wheels to move the vehicle in the forward or backward direction, and to a second set of wheels to move the vehicle and the right or left direction, c. a holiday detection apparatus having a wettable sponge electrical contact element for establishing an electric circuit with the base plate through each of the holidays, d. a tank for containing an electrolytic fluid supplied into the wettable sponge, and e. a controller which selectively operates the power drive unit to: move the vehicle in the forward direction for selected distance, and f. to move the vehicle in the left or right direction for selected distance, the vehicle thus being movable along a path while the holiday testing apparatus thereon detects and marks holidays for subsequent repair.

Abstract: A robotic holiday testing apparatus for detecting and marking holidays in the protective coating atop a metal base plate of a storage tank, including: a. a vehicle, b. a power drive unit selectively coupled to a first set of wheels to move the vehicle in the forward or backward direction, and to a second set of wheels to move the vehicle and the right or left direction, c. a holiday detection apparatus having a wettable sponge electrical contact element for establishing an electric circuit with the base plate through each of the holidays, d. a tank for containing an electrolytic fluid supplied into the wettable sponge, and e. a controller which selectively operates the power drive unit to: move the vehicle in the forward direction for selected distance, and f. to move the vehicle in the left or right direction for selected distance, the vehicle thus being movable along a path while the holiday testing apparatus thereon detects and marks holidays for subsequent repair.

Abstract: A hazardous gases and wind direction sensor includes a housing having a hazardous gas sensor. The gas sensor sends an output signal to a transmitter at a predetermined frequency upon detecting a hazardous gas. Wind detection is provided by eight LEDs aligned with eight corresponding photocells disposed in the housing, where each photocell represents a topographical direction and is adapted to provide an output signal associated with a particular wind direction at a predetermined frequency. A disk is coupled to a rotatable shaft in the housing and positioned between the LEDs and photocells. The shaft is coupled to a wind direction indicator such as a windsock. The disk has a slot sized to allow light to pass from one of the LEDs to its corresponding photocell, which sends an output signal to enable a switching circuit in the transmitter. The switching circuit enables the output signal at a predetermined frequency to be transmitted to a receiver.

Abstract: A hazardous gases and wind direction sensor includes a housing having a hazardous gas sensor. The gas sensor sends an output signal to a transmitter at a predetermined frequency upon detecting a hazardous gas. Wind detection is provided by eight LEDs aligned with eight corresponding photocells disposed in the housing, where each photocell represents a topographical direction and is adapted to provide an output signal associated with a particular wind direction at a predetermined frequency. A disk is coupled to a rotatable shaft in the housing and positioned between the LEDs and photocells. The shaft is coupled to a wind direction indicator such as a windsock. The disk has a slot sized to allow light to pass from one of the LEDs to its corresponding photocell, which sends an output signal to enable a switching circuit in the transmitter. The switching circuit enables the output signal at a predetermined frequency to be transmitted to a receiver.