Profile: Gordinier Electronics, Inc. deals with liquid nitrogen control systems. We specialize in level alarms and monitoring, liquid nitrogen controllers and control rate freezing systems. Model 600 has been designed to provide complete level protection. The unit is used as a high level over-fill or a low level alarm. It is equipped with both visual and audible indication. Model 610 is a battery operated liquid nitrogen low level alarm. This handy unit is also equipped with a built-in battery charger, a bracket designed to protect the unit during fill and provide easy access to the front plate.