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Level alarm - 4 - 10 A, 220 - 400 V | RT 280 series
RT 280A and 281A primarily serves as liquid level alarms and safety switches to prevent high liquid level in liquid separators. Secondarily, RT 280A and 281A also serves as liquid level regulators where up to 40 mm of liquid level differential is permitted. RT 280A and 281A serves as safety switches to ensure the flooded evaporators, pump tanks or liquid separators does not exceed the max. permissible refrigerant level. As liquid level regulators, RT 280A and 281A are known to maintain flooded evaporators, pump tanks or liquid separators with a constant average refrigerant level