Omega OMA-VM540 and OMA-VM541 Series are complete multiple temperature and powered input monitor and alarm systems with an integrated autodialer. They can monitor up to four (4) RTD temperature sensors, four (4) powered inputs, one (1) dry contact input, and wall outlet power. You can program high and low-temperature limits and an alarm time delay for each sensor. The identification message can be recorded for each sensor. The system has numerous options that allow it to be configured for any application.