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LE20-2621

The SICK LE20-2621 is a versatile background suppression photoelectric sensor designed for precise object detection and distance measurement in industrial automation applications. This compact sensor combines reliable performance with easy installation and adjustment capabilities.

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Key Features

Precise Background Suppression

Fixed sensing range: 20-260 mm

Background suppression technology

High repeat accuracy: ±1 mm

Red light laser (650 nm)

Compact and Robust Design

Compact housing: 40 × 15 × 32 mm

IP67 protection rating

Stainless steel housing

Vibration and shock resistant

Easy Operation

Potentiometer for sensitivity adjustment

LED status indicators

Teach-in functionality

360° visible light spot

Flexible Output Options

PNP output configuration

NO/NC selectable

Short-circuit protection

Reverse polarity protection

Technical Specifications

Parameter Specification
Sensing Principle Background suppression
Sensing Range 20-260 mm
Light Source Red laser (650 nm)
Light Spot Size ⌀ 2.5 mm at 200 mm
Repeat Accuracy ±1 mm
Response Time 1 ms
Output Type PNP (NO/NC selectable)
Supply Voltage 10-30 V DC
Current Consumption < 25 mA
Switching Capacity 100 mA
Voltage Drop < 2.5 V
Protection Rating IP67
Housing Material Stainless steel (1.4305)
Connection 2 m PVC cable, 4-wire
Operating Temperature -25°C to +60°C
Storage Temperature -40°C to +85°C
Weight 60 g
Optical Characteristics

Wavelength: 650 nm (red)

Beam Type: Focused laser beam

Ambient Light Immunity: ≤ 30000 Lux

Alignment Aid: Visible light spot

Electrical Characteristics

Switching Frequency: 500 Hz

Delay Time: < 1 ms

Hysteresis: < 10% of sensing distance

Linearity: ±2% of measuring range

Mechanical Specifications

Housing Dimensions: 40 × 15 × 32 mm

Mounting: 2x M3 threaded holes

Material: Stainless steel 1.4305

Front Material: Optical glass

Environmental Ratings

Shock Resistance: 100 g (11 ms)

Vibration Resistance: 10 g (10-500 Hz)

EMC Immunity: 30 V/m

Humidity Resistance: 95% RH

Applications

Object detection on conveyors

Height measurement and control

Package counting and sorting

Robot positioning

Assembly verification

Packaging machinery

Material handling systems