The inexpensive IP99 Programmable Logic Controller from International Parallel Machines Inc., of New Bedford, Mass., offers nine inputs and nine outputs featuring analog, AC and DC, 1 MHz high-speed counter, pulse measurement in microseconds, all-metal case, real-time clock with alarm, ASCII string I/O, 10-year battery, and RS485 and RS232 networking. It’s ideally suited for use with HVAC and liquid level controls to report readings and automatically request service.