The DM-900 Site Monitor is a highly sophisticated stand alone product that delivers quality monitoring at a reasonable price. The DM-900 has eight inputs that can be used to monitor the lights and additional conditions that are important at your site.

The DM-900 has a built in photocell monitor that works with 110VAC and 5VDC photocells. The system logs when the photocell changes from day to night and back to day and will alarm if the photocell fails to change after a predetermined amount of time. The cabinet door is monitored and can be used to generate an alarm when the unit is being worked on and for tamper detection. When there is a power loss an onboard circuit monitors the battery voltage disconnecting it before the voltage drops to low and causes damage to the backup battery.