Panasonic LS-H91-A Digital Laser Sensor Head

Technical Overview

Compact coaxial retroreflective laser sensor head, 0.1-5m sensing range, IP40, -10 to +55°C, Class 2 laser. Requires external amplifier.

Key Features

Coaxial retroreflective type sensor head.
Compact body dimensions (11.2 x 31 x 25 mm).
Wide sensing range up to 5 meters (U-LG mode) with RF-330 reflector.
IP40 protection rating for industrial environments.
Operates in temperatures from -10 to +55 °C.
Requires connection to Panasonic LS-400 series amplifier units (e.g., LS-401(P), LS-401(P)-C2, LS-403).
Features a spot-shape adjuster for fine-tuning beam diameter.
Equipped with green LED laser emission indicator and orange LED operation indicator.
Class 2 (IEC/EN/JIS/GB/KC) red semiconductor laser with 3 mW max. output.

Technical Specification Matrix

Parameter	Value
Type of sensor	Photoelectric, Laser (Coaxial Retroreflective)
Sensing Range (U-LG mode)	0.1 to 5 m with RF-330 reflector
Sensing Range (STD mode)	0.1 to 3 m with RF-330 reflector
Sensing Range (FAST/H-SP mode)	0.1 to 1 m with RF-330 reflector
Minimum Detectable Object Distance	Less than 0.1 m
IP Rating	IP40 (IEC)
Operating Temperature	-10 to +55 °C (No dew condensation or icing allowed)
Storage Temperature	-20 to +70 °C
Ambient Humidity	35 to 85 % RH (Storage: 35 to 85 % RH)
Body Material (Enclosure)	PBT (Mounting part: PEI)
Body Material (Lens Cover)	Acrylic
Cable Type	0.1 mm², single core two parallel shielded cables
Cable Length	2 m (fixed, with amplifier connector)
Emitting Element	Red semiconductor laser
Laser Class (IEC/EN/JIS/GB/KC)	Class 2 (Max. output: 3 mW, Peak emission wavelength: 655 nm)
Laser Class (FDA/IEC/EN/JIS)	Class 1 (Max. output: 1 mW, Peak emission wavelength: 655 nm)
Applicable Amplifiers	LS-401(P), LS-401(P)-C2, LS-403
Physical Weight (kg)	0.03
Dimensions L x W x H (cm)	3.1 x 2.5 x 1.12

Industrial Applications

1. High-Speed Production Line Object Counting

Accurately counts small, fast-moving items on conveyor belts or sorting lines, ensuring precise inventory management and preventing production errors.

Problem Solved

Traditional sensors may struggle with the speed or size of objects, leading to miscounts. The LS-H91-A's laser precision and adjustable sensing modes (e.g., FAST mode 0.1-1m) ensure reliable detection even for rapid movements.

High-speed countingSmall object detectionConveyor belt automationPrecise inventory0.1-1m sensing range

2. Robotic Arm Position Verification in Assembly

Verifies the precise presence or position of components being manipulated by robotic arms during assembly processes, preventing misalignment or damage.

Problem Solved

Ensures components are correctly seated before subsequent operations, reducing defects. The compact size (1.12 x 3.1 x 2.5 cm) allows for integration into tight robotic end-effectors or fixturing.

Robotic assemblyComponent presence detectionPrecision positioningCompact sensor0.1-5m sensing range

3. Material Level Monitoring in Small Hoppers

Monitors the fill level of granular materials or small parts within compact hoppers or feeders, preventing overflows or insufficient supply.

Problem Solved

Provides accurate feedback on material levels in constrained spaces where bulkier sensors cannot fit, ensuring continuous operation and optimized material flow. The IP40 rating offers basic protection against dust ingress in such environments.

Level sensingMaterial detectionSmall hoppersCompact designIP40 protection