Underground Systems, Inc.

MULTIGAS

Sensors and analyzers for testing the presence and measuring the concentration of gases;

PD2

Sensing and power rating measuring devices for use with overhead high voltage transmission lines;PD TWO; PD TO;

POWER DONUT2

Electronic sensing, measuring and electric power rating device for determining the performance and efficiency of electric power generators and transmission equipment;POWER DONUT TWO;POWER;

TPA

Test instrument and computer software used for determining thermal properties for electrical power analysis;

UPRATE

Electric current, voltage and heat sensors; electrical and/or optical circuits including wires and cables, signal conditioners, modems; microprocessor based instruments, computers; communications to central computer processing units, including wireless, fiber optic and electric wires and cables, satellite, infrared, and radio; algorithms for data filtering, storage, communications, displays and calculation of thermal ratings and subsidiary parameters; man-machine interface screens and controls; computer work stations,namely, keyboards, monitors, data storage devices, central processors, arithmetic processors and printers and computer operation software for use in monitoring ratings, diagnosing and controlling electric power delivery systems and parts thereof;UP DATE;

USI

electric power monitoring, rating, diagnostic and control systems comprised of sensors, signal processors, software and communications circuits for underground cable systems, substation equipment, overhead lines and their component parts; electric power cable systems and accessories, namely, splices, terminations, gas pressurizing plants, link boxes and generator bushings;engineering consulting services;

USI

electronic inventory monitoring and control equipment for storage tanks;UNDER GROUND SYSTEMS INCORPORATED;