Fully Operational with Expanded Resources
Click for the latest on how KEYENCE is continuing to support our customers with quick delivery, off-site testing, virtual demos and more.

Multi-Purpose Digital Laser Sensor

LV-N series

View Catalogue

LV-S31 Small Beam Spot Reflective

Small size and highly flexible installation

LV-S31: Unaffected by Targets' Colour

No readjustment needed for tooling change

Since the LV-S31 detects based on target height or position, and not colour, it will not have to be readjusted when the colour of a target changes.

LV-S31 Series Adjustable Distance Detecting Head Laser Sensor

Light receiving element: Dual Photodiode

: The dual photodiode (PD) receives the reflected beam spot from a target and focuses it onto the dual PD. By adjusting the trimmer, the reflected spot can be centred so that half of the spot is on the NEAR PD, and half is on the FAR PD for a 1:1 ratio. As the target moves closer to the head, the reflected beam spot shifts more toward the NEAR PD and the displayed value will decrease. As the target is moved away from the head, the spot shifts toward the FAR PD and the displayed value increases. By detecting based on distance and not brightness, the LV-S31 can be set to detect that a part is not only present, but that it is in the correct position, regardless of the surface colour.

Adjust setting to optimum conditions without relocating sensor - Adjustable Structure

You can adjust light receiving element to optimum conditions by simply rotating the adjustment trimmer.

Adjust setting to optimum conditions without relocating sensor - Adjustable Structure

Adjust setting with a sensor head

The sensor head is equipped with an output indicator and position indicator that indicates the distance with a target. This makes it easy to adjust the settings online if the amplifier is not easily accessible or visible.

Distance - Hysteresis (Typical)

Hysteresis when the light receiving element and the setting value are adjusted to 5000 at each distance.

Distance - Hysteresis (Typical)

Colour canceling function: Dual photodiode and original algorithm correct colour influence of a target that is displaced from the centere.

Long-range gap detection: The LV-S31 can detect a 0.04" (1 mm) gap at a distance of 7.87" (200 mm) and a 0.02" (0.5 mm) gap at a distance of 1.97" (50 mm). (Target: White paper, response speed: SPED4 at ambient temperature) *Maximum detecting distance varies according to target's reflectance

Applications

Orientation: Detecting loose caps

Presence/Absence: Detecting presence/absence of contents

Specifications

Model		LV-S41	LV-S41L	LV-S31
Type		Small	Small side view	Adjustable distance definite reflective
FDA (CDRH) Part 1040.10		Class 1 Laser Product
IEC 60825-1
Light source		Visible red semiconductor laser, Wavelength: 655 nm
Detecting distance	MEGA	600 mm	480 mm	50 to 200 mm (Adjustment range)
	ULTRA	500 mm	400 mm
	SUPER	400 mm	320 mm
	TURBO	300 mm	240 mm
	FINE	200 mm	160 mm
	HSP	150 mm	120 mm
Environmental resistance	Ambient temperature	-10 to +50 °C (No freezing)		0 to +50 °C (No freezing)
Material	Case	Glass reinforced plastic
	Display	Polycarbonate
	Lens cover	Norbornene plastic	Acrylic	Transmitter lens: Norbornene plastic Receiver lens cover: Polyarylate
Weight		Approx. 70 g		Approx. 75 g