Panasonic LS-H21F-A Class 1 Digital Laser Sensor Head

Technical Overview

Class 1 diffuse reflective laser sensor head with multi-turn spot adjuster, 30-500mm range, IP40, -10-55°C, 1mW Red Laser for precision object detection.

Key Features

Amplifier-separated design for flexible system integration
Class 1 red semiconductor laser (1 mW max output, 655 nm wavelength)
Multi-turn spot-shape adjuster for precise beam alignment and spot focusing
Versatile sensing range: 30 mm to 500 mm (U-LG mode)
IP40 protection for industrial environments
Wide ambient operating temperature range: -10 to +55 °C
Supports various sensing modes: U-LG, STD, FAST, H-SP
Automatic interference prevention for multi-sensor setups
Robust PBT enclosure and Acrylic lens cover construction
Compatible with LS-400 series amplifiers for advanced functionalities

Technical Specification Matrix

Parameter	Value
Sensor Type	Diffuse reflective
Laser Class	Class 1 (FDA/IEC/EN/JIS)
Applicable Amplifiers	LS-401(P), LS-401(P)-C2, LS-403
Sensing Range (U-LG mode)	30 to 500 mm (1.181 to 19.685 in)
Sensing Range (STD mode)	30 to 250 mm (1.181 to 9.843 in)
Sensing Range (FAST mode)	30 to 150 mm (1.181 to 5.906 in)
Sensing Range (H-SP mode)	30 to 150 mm (1.181 to 5.906 in)
Operation Indicator	Orange LED (lights up when amplifier output is ON)
Laser Emission Indicator	Green LED (lights up during laser emission)
Spot-Shape Adjuster	Multi-turn adjuster
Protection Rating	IP40 (IEC)
Ambient Temperature	-10 to +55 °C (+14 to +131 °F) (No dew condensation or icing allowed)
Storage Temperature	-20 to +70 °C (-4 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 together and enclosure
Insulation Resistance	20 MΩ or more, with 250 V DC megger between all supply terminals connected together and enclosure
Vibration Resistance	10 to 500 Hz frequency, 1.5 mm (0.059 in) double amplitude or maximum acceleration 98 m/s² in X, Y and Z directions for two hours each
Shock Resistance	98 m/s² acceleration (10 G approx.) in X, Y and Z directions three times each
Emitting Element	Red semiconductor laser
Maximum Output	1 mW
Peak Emission Wavelength	655 nm (0.026 mil)
Enclosure Material	PBT (Mounting part: PEI)
Lens Cover Material	Acrylic
Cable Type	0.1 mm², single core two parallel shielded cables
Cable Length	2 m (6.562 ft)
Net Weight	30 g approx.
Physical Weight (kg)	0.03
Dimensions L x W x H (cm)	3.1 x 1.12 x 1.55

Industrial Applications

1. Precision Component Pin Detection in Electronics Assembly

In automated electronics assembly lines, accurately detecting the presence and position of delicate component pins is crucial for quality control and preventing misalignments. The LS-H21F-A's Class 1 laser and multi-turn spot-shape adjuster allow for extremely fine beam focus, making it ideal for pinpointing tiny objects from a remote location.

Problem Solved

Ensures accurate placement and verification of small, delicate electronic component pins by providing high-precision, adjustable spot detection, thereby enhancing product quality and reducing defects.

Electronics assemblyComponent detectionPin alignmentMiniature object sensingPrecision laserSpot adjustment

2. Material Level Monitoring in Small Hoppers

For small hoppers or bins containing fine powders, granules, or small parts, maintaining precise material levels is essential to prevent overflow or depletion. The LS-H21F-A's diffuse reflective sensing and adjustable range (down to 30 mm) enable non-contact monitoring of material surfaces, even for uneven textures. Its compact size facilitates installation in confined spaces typical of small hoppers.

Problem Solved

Provides reliable, non-contact level detection for various materials in compact storage units, optimizing inventory management, preventing production disruptions, and avoiding material waste.

Material level sensingHopper monitoringDiffuse reflectiveCompact sensorNon-contact measurementGranular materials

3. Edge Detection for Web Guiding Systems

In manufacturing processes involving continuous webs of material (e.g., film, paper, fabric), precise edge detection is vital for web guiding systems to ensure material remains centered and processed correctly. The LS-H21F-A's Class 1 laser and adjustable spot allow for consistent and accurate detection of material edges, even for transparent or semi-transparent films when combined with appropriate sensing modes, using its ability to detect rapid changes in light received.

Problem Solved

Enables accurate and stable web guiding by reliably detecting material edges, including challenging transparent films, to maintain production quality, minimize waste, and improve process efficiency.

Web guidingEdge detectionFilm processingMaterial alignmentDifferential sensingTransparent material