084H6003 Danfoss LLS 4000U 3/4" NPT Liquid Level Switch

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.

The level switch includes a relay that switches by change in refrigerant state. The on site configuration of the LLS allows the normally open/closed relay setting depending on the desired correlation.

Features:

• Plug and play liquid level switch
• Easy installation and minimum or no need for configuration
• SIL design with redundancy on microprocessor and relay
• Convenient communication with all units via Bluetooth and a Danfoss app
• SIL2 compliant version
• Two commonly used connection variants
• Maintenance free
• Replacement of electronic part without removing mechanical part (not applicable for SIL2 devices)
• Applicable for ammonia and commonly used H(C)FCs
• Applicable for R1234ze(E) with POE oils (miscible) or oil free systems
• Applicable for refrigerant oils in Ammonia and H(C)FC systems with a refrigerant gas temperature up to max. 80 °C
• For other medias and mixed medias, please contact Danfoss
• Well proven reflectometry measuring principle
• Conforms to: Telecommunications Directive RED 2014/53 EU. Low voltage directive 2014/35/EU. EMC directive 2014/30/EU. ROHS 2011/65/EU
• Approvals: SIL2, FCC, IC, EAC, UA, CMIIT, ANATEL, NBTC CRN