Electrical corrosion probes, namely-retrievable, retractable and fixed probes, flush and tubular probes, erosion, sand, atmospheric, underground, high temperature, subsea, spool, and flow-through type probes; electrical instruments; namely-- continuous corrosion monitors, corrosion process transmitters, portable corrosion monitoring, measuring and recording instruments, corrosion data loggers, data converters, and cathodic protection control instruments, electrical systems, namely-underground probe systems, desalination monitoring systems, atmospheric corrosion monitoring systems, sand monitoring systems, erosion monitoring systems, high temperature monitoring systems, telemetry systems, solar power systems, inhibitor performance monitoring and control systems, concrete corrosion monitoring systems, and cathodic protection performance monitoring and control systems; electrical power supplies, solar power supplies, electrical cables, batteries, junction boxes, and probe adaptors, software and firmware for use in corrosion detection, recording, monitoring, protection, and control, software capsules for use in establishing controlled data flow between transmitters and data logger units, and to collect stored data and to clear the data logger memory, and for use in network application programs to monitor a group of transmitters, and also to monitor one transmitter at a time, and for use in plotting corrosion data acquired in conjunction with recording, logging, and network logging applications programs, and parts and fittings thereof