Liquid level switches

AKS

LLS 4000 / LLS 4000U

The LLS 4000/4000U liquid level switch is designed to detect the state (gas or liquid) of the refrigerant in front of the sensing head, while installed in a wide range of refrigeration applications. The LLS level switch comes in 2 variants, LLS 4000 and LLS 4000U. They are identical except for the connector thread interface to the system. The LLS 4000 is provided with G 3⁄4” thread, while the LLS 4000U is provided with NPT 3⁄4” thread. The LLS 4000/4000U liquid level switch is based on the proven reflectometry measuring technology (microwave level measurement) adapted specifically for the new LLS 4000/4000U switch. LLS 4000/4000U liquid level switches can be used to control the liquid level of many different refrigerants in vessels, accumulators, receivers, standpipes, etc. The switches are normally installed in a pair of two, controlling the upper liquid level and the lower liquid level.

RT

RT 280A and RT 281A are primarily used as liquid level alarms and safety switches to prevent too high a liquid level in liquid separators. Secondarily, RT 280A and RT 281A can be used as liquid level regulators where a liquid level differential of up to ±40 mm can be permitted. When used as safety switches, RT 280A and RT 281A ensure that the max. permissible refrigerant level in flooded evaporators, pump tanks or liquid separators is not exceeded. As liquid level regulators, RT 280A and RT 281A maintain a constant average refrigerant level in flooded evaporators, pump tanks or liquid separators.