Panasonic EX-L221-P Ultra-compact Spot Reflective Laser Sensor

Technical Overview

Ultra-compact laser sensor with amplifier built-in, 0.01mm object detection, 0.02mm repeatability, 45-300mm sensing range, 12-24VDC, IP67 rated.

Key Features

Amplifier built-in, ultra-compact design for space-saving installations
Class 1 laser product conforming to IEC / EN / JIS / GB / KS / FDA safety standards
Highly accurate detection with 0.01 mm minimum sensing object (gold wire) and 0.02 mm repeatability
Incorporates a high-precision aspheric glass lens for reduced light aberrations and a high-definition laser spot
Small ø0.5 mm receiver aperture for enhanced precision by eliminating errant beams
Easy beam-axis alignment facilitated by visual positioning with a red spot and beam alignment screen
IP67 protection structure ensures strong resistance against water and dust
M3 screws with metal sleeves for secure tightening up to 0.5 N·m
Increased conductor thickness (0.15 mm²) for easier crimping work and improved tensile strength
Low current consumption, approximately 5 mA lower than LED light sources
Switchable output operation (Light-ON / Dark-ON) via a single input, preventing ordering mistakes and reducing spare parts
Integrated short-circuit protection and inverse polarity protection

Technical Specification Matrix

Parameter	Value
Type	Spot reflective
Sensing Range	45 to 300 mm (1.772 to 11.811 in)
Emission Spot Size (Typical)	ø1 mm (ø0.039 in) or less (at 300 mm sensing distance)
Minimum Sensing Object (Typical)	Gold wire of ø0.01 mm (ø0.0004 in)
Hysteresis	20% or less of operation distance (Perpendicular to sensing axis: 0.2 mm (0.0080 in) or less)
Repeatability (Typical)	0.02 mm (0.0008 in) or less (at 100 to 200 mm sensing distance)
Supply Voltage	12 to 24 V DC ±10% Ripple P-P 10% or less
Current Consumption	15 mA or less
Output Type	PNP open-collector transistor
Maximum Source Current	50 mA
Applied Output Voltage	26.4 V DC or less (between output and +V)
Output Residual Voltage	2 V or less (at 50 mA source current), 1 V or less (at 16 mA source current)
Output Operation	Light-ON / Dark-ON selectable
Short-circuit Protection	Incorporated (short-circuit protection / inverse polarity protection)
Response Time	0.5 ms or less
Operation Indicator	Orange LED (lights up when output is ON)
Stability Indicator	Green LED (lights up under stable light received/dark condition)
Automatic Interference Prevention	Incorporated (Two sensors can be mounted close together)
Sensitivity Adjuster	Continuously variable adjuster
Protection Structure	IP67 (IEC)
Ambient Temperature	-10 to +55 °C (+14 to +131 °F) (No dew condensation or icing allowed)
Storage Temperature	-30 to +70 °C (-22 to +158 °F)
Ambient Humidity	35 to 85% RH (Storage: 35 to 85% RH)
Ambient Illuminance	Incandescent light: 3,000 lx or less at light-receiving face
Voltage Withstandability	1,000 V AC for one min. (between all supply terminals connected and enclosure)
Insulation Resistance	20 MΩ or more, with 250 V DC megger (between all supply terminals connected and enclosure)
Vibration Resistance	10 to 500 Hz frequency, 1.5 mm (0.059 in) double amplitude (10 G max.) in X, Y and Z directions for two hours each
Shock Resistance	500 m/s² acceleration (50 G approx.) in X, Y and Z directions three times each
Emitting Element	Red semiconductor laser Class 1 (Maximum output: 2 mW, Peak emission wavelength: 655 nm)
Enclosure Material	Polybutylene terephthalate
Front Cover Material	Acrylic
Lens Material	Glass
Indicator Part Material	Polyarylate
Cable	0.15 mm² 4-core cabtyre cable, 2 m (6.562 ft) long
Cable Extension	Up to total 50 m (164.042 ft) with 0.3 mm² or more cable
Physical Weight (kg)	0.05
Dimensions L x W x H (cm)	1.3 x 0.82 x 2.74

Industrial Applications

1. Precision Detection of Misaligned ICs in Palettes

In automated electronics manufacturing, ensuring correct placement of Integrated Circuits (ICs) on multiple palettes is critical. The EX-L221-P's minute object detection capability allows for precise identification of ICs that are out of position, preventing assembly errors.

Problem Solved

Prevents defects by accurately detecting minute misalignments of electronic components, such as ICs, on assembly lines.

IC positioningelectronics assemblymisalignment detection0.01mm resolution

2. O-Ring Presence and Placement Verification

Used in sealing and fluid transfer applications, O-rings must be correctly placed to prevent leaks. The EX-L221-P can reliably sense the presence and proper seating of small, often dark or unevenly colored O-rings, ensuring product integrity.

Problem Solved

Verifies the accurate presence and placement of small O-rings, crucial for maintaining sealing integrity in mechanical assemblies.

O-ring detectionassembly verificationseal integrityunevenly colored object sensing

3. Accurate Positioning of Fine Mechanical Parts

For intricate mechanical assembly or quality control, precise positioning of very small components is essential. The EX-L221-P, with its 0.02 mm repeatability and ability to detect objects as small as ø0.01 mm, is ideal for high-accuracy positioning tasks and detecting the tips of thin pipes.

Problem Solved

Enables high-accuracy positioning and detection of fine mechanical parts, improving precision in automated assembly and quality control processes.

fine part positioningmicro-assemblyprecision sensing0.02mm repeatability