Monitoring of Temperature in liquid nitrogen Dewar’s  with visual and audible alarms. The Quantum Temperature Alarm consists of a level sensor, monitor/alarm unit and a low output voltage power supply unit. The monitor/alarm unit continuously monitors the signal from the temperature sensor and houses the audible and visual alarms. It can be fitted to the body, lid, neck or carrying handle of a liquid nitrogen container or can be mounted on a nearby wall or surface. The compact power supply unit is fully enclosed in a robust, molded case. It provides a low voltage output (12V. d.c.) through an interconnecting cable to the monitor/alarm unit, backup power supply available. The temperature sensor is placed in the vessel at the required level, the monitor/alarm unit is fixed in place and the power supply unit is connected to the electrical mains. The user defines the alarm set point that can be adjusted within minutes should this be required in the future. When the temperature when the liquid nitrogen level falls below the defined set point the red alarm light flashes and the audible alarm bleeps. At the same time any suitably connected external alarm is activated, auto dial unit.

An analogue output is available to connect to BMS system and monitor the actual temperature at all time, telemetry output signal is a 0 – 5V DC signal.