LIQ-SWITCH is a switch over system for liquid N2 tanks. Functions: - Real time monitoring measures and pressures through LCD display with backlight - Alarm signaling through blinking visual and acoustic indicators with recovery time programmable by the user - Programming by encoder with button integrated - Alarm acoustic signal with stop pushbutton on front panel - Solenoid valves status indication on front panel - Automatic switch over functions for empty tank, through integrated solenoid valves - Set points programmable by the user for minimum level, low operating tank pressures, high and low supply output pressure - N2 Supply output status available on front panel with Liquid or Gas LED indication - Manual function for maintenance operations - Proprietary network protocol CRIONet - Remote monitoring for measures and alarms through optional modem card PSTN or through external MOD-COM modem for PSTN/ GSM network - Auxiliary output switch for external cumulative alarm indicator or hooter