Pepperl+Fuchs LFL2-CK-U-PUR5-EMS Float Switch

Technical Overview

Compact float switch with mercury-free microswitch for fluid limit detection, IP68 rated, 250 VAC/3 A, G1 tap hole mounting.

Key Features

Switch element: microswitch, mercury-free
Limit value detection for fluids
Sleeve design: small diameter, mounting through G1 tap hole possible
Change-over contact
Preferred for fuels, heating oils, oily fluids

Technical Specification Matrix

Parameter	Value
Contact loading (AC)	250 V AC / 3 A (resistive load)
Contact loading (DC1)	150 V DC / 0.25 A (resistive load)
Contact loading (DC2)	60 V DC / 1 A (resistive load)
Rated insulation voltage	300 V
Pulse withstand voltage	4 kV
Electrical life	≥ 5 x 10^4 switching cycles
Degree of protection	IP68 (IEC 60529:2001)
Construction type	Sleeve design
Switch element type	Microswitch with switching ball, change-over contact
Float material	PP (Polypropylene)
Physical Weight (kg)	0
Dimensions L x W x H (cm)	13.5 x 2.92 x 2.92

Industrial Applications

1. Industrial Sump Level Monitoring

This float switch can be deployed in industrial sumps to monitor critical liquid levels, preventing overflows or ensuring pumps do not run dry. Its IP68 rating guarantees reliable operation in challenging liquid environments, and the 250 VAC/3A contact loading is suitable for direct control of small pumps or alarm systems.

Problem Solved

Prevents industrial sump overflows and pump damage from dry-running by accurately detecting fluid limit values.

IP68Fluid Level Detection250 VAC/3 AIndustrial SumpOverflow Prevention

2. Fuel Tank High/Low Level Alarm

Ideal for monitoring fuel tanks in generator sets, industrial machinery, or heating oil storage, this switch provides accurate high or low level alarms. Its 'preferred for fuels, heating oils, oily fluids' characteristic and IP68 protection ensure durability and safe operation in combustible liquid environments, triggering alerts to prevent costly spills or operational interruptions.

Problem Solved

Provides reliable high/low level alarms in fuel tanks, preventing spills and ensuring continuous operation of fuel-dependent systems.

Fuel Level SensorIP68Oily FluidsLimit Value DetectionAlarm System

3. Hydraulic Reservoir Fluid Level Control

In hydraulic power units, maintaining optimal fluid levels is vital. The small diameter and G1 tap hole mounting capability of this float switch allow for easy integration into hydraulic reservoirs. It can detect low fluid levels, signaling a PLC or control system (via 60 VDC/1A contact) to initiate a top-up sequence or shut down the hydraulic pump, thereby protecting expensive hydraulic components.

Problem Solved

Safeguards hydraulic systems by monitoring reservoir fluid levels, preventing pump cavitation and component damage due to low fluid conditions.

Hydraulic Fluid LevelG1 Tap Hole60 VDC/1 AReservoir MonitoringPump Protection