LV-S61 Retro-Reflective Sensor | Keyence

Keyence LV-S61 Retro-Reflective Laser Sensor Head for LV-N Series Amplifiers

Product Introduction

The LV-S61 belongs to Keyence's LV-S ultra-small series of digital laser sensor heads. This retro-reflective, spot-type model delivers reliable detection across a 2.5 m maximum range when paired with an LV-N series amplifier and a suitable reflector. Its visible red semiconductor laser operates at 655 nm and meets Class 1 safety standards under FDA CDRH and IEC 60825-1 regulations. Because the sensor head receives power and signal processing through the amplifier, it requires no separate power supply or output circuitry of its own. This design simplifies wiring and reduces the footprint at the sensing point.

Technical Specifications

The LV-S61 uses a visible red semiconductor laser with a wavelength of 655 nm. Detection distance reaches 2.5 m in MEGA mode when connected to a compatible LV-N amplifier. The laser classification is Class 1 according to FDA CDRH Part 1040.10 and IEC 60825-1, so the unit is safe under normal operating conditions without extra protective measures. The sensor head features a glass-reinforced plastic housing that balances durability with low weight. Since the LV-S61 is a sensor head only, it contains no built-in communication ports or output transistors. All signal output and communication functions are handled by the connected LV-N amplifier unit.

Mechanical and Environmental Parameters

The sensor head operates within an ambient temperature range of -10 to +50 °C with no freezing permitted. Its compact glass-reinforced plastic enclosure keeps the unit at approximately 70 g, minimizing mechanical load on mounting brackets and moving fixtures. Specific dimensions and ingress protection ratings are not published for this model. The LV-S61 connects to the amplifier through a dedicated cable, so users should verify cable length and routing space during installation planning. For environments with fine particles or coolant mist, users should confirm suitability with Keyence technical documentation, as the sensor head does not carry a published IP rating.

Installation Guide

First, mount the LV-S61 using the appropriate bracket for your application. The ultra-small form factor allows placement in tight spaces where standard sensor heads cannot fit. Next, install a compatible reflector opposite the sensor head along the detection path. Then, connect the sensor head to an LV-N series amplifier using the dedicated cable. Ensure the connector is fully seated and the locking mechanism engages. After powering the amplifier, align the laser beam with the reflector center and adjust sensitivity according to the working distance. During commissioning, verify that the beam returns cleanly and that ambient light does not interfere with detection. Finally, tighten all mounting hardware and perform a test cycle to confirm consistent output signals.

Packaging List

• LV-S61 sensor head × 1

• Dedicated connection cable × 1

• Mounting bracket (standard) × 1

• Installation screws × 1 set

• Product manual × 1

FAQ

Q1: Does the LV-S61 work without an LV-N amplifier?
No. The LV-S61 is a sensor head only. It requires an LV-N series amplifier to supply power and process the detection signal.

Q2: Does the LV-S61 require a reflector?
Yes. As a retro-reflective model, the LV-S61 needs a compatible reflector mounted opposite the head. The beam travels to the reflector and back, so an object breaks detection when it interrupts the path.

Q3: What is the maximum detection distance?
In MEGA mode, the LV-S61 reaches up to 2.5 m. This long range suits conveyor lines, entry points, and wide-area monitoring.

Q4: What laser class is this product?
The LV-S61 is a Class 1 laser product under FDA CDRH Part 1040.10 and IEC 60825-1. It is safe for normal operation without special eye protection.

Q5: How fast can you ship this item?
We ship via Fedex, UPS, and DHL. In-stock orders typically dispatch within 1–3 business days after payment confirmation.