The HC-9100 family of digital products are intended to replace electro-mechanical products that have been used in a variety of industries for decades. The HC-9100 family of products provides digital solutions that are very robust and offer to the market superior control and sensing accuracy, menu driven programming, field calibration, tamper proof features, flexible use with existing sensors, and an LED display which is easy to see in low light conditions. This family of products features a rugged enclosure, 30 amp relay(s) and 240 VAC power option. Contractors that standardize on these products for their customers find that fewer models are needed to cover the same number of applications. Finally, service technicians find the devices easy to install and intuitive to program.