Keyence LV-NH300 Thrubeam Laser Sensor Head

Product Introduction

The Keyence LV-NH300 belongs to the LV-N series of digital laser sensors. Specifically, this unit serves as a thrubeam area-type sensor head with a zero line reference design. Its beam band starts at a defined reference line rather than spreading from a central axis. Additionally, this zero line layout makes edge position and pass/fail judgments more consistent. Therefore, technicians can measure target edges and widths with stable repeatability. The head contains no output circuitry. Instead, it relies on a dedicated cable connection to an LV-N series amplifier for power and signal processing.

Technical Specifications

The optical performance of the LV-NH300 centers on a 660 nm visible red semiconductor laser. This light source meets Class 1 laser safety requirements under FDA CDRH Part 1040.10 and IEC 60825-1 standards. Consequently, the sensor operates safely in typical industrial environments without additional protective enclosures.

Detecting Distance and Area

The LV-NH300 provides a detecting distance of 2000 mm while maintaining a 30 mm detecting area. This combination suits long-span installations such as wide conveyor lines and large assembly stations. Meanwhile, the zero line reference aligns the beam band with a fixed mechanical datum. As a result, the sensor reports edge positions relative to that datum, which simplifies setup and repeatability. Users should keep the emitter and receiver parallel to preserve beam uniformity across the full distance.

Amplifier Dependency

This sensor head contains no built-in communication ports or output transistors. Instead, all signal processing occurs within the LV-N series amplifier. Therefore, the LV-NH300 requires a compatible amplifier unit (such as LV-N11N or LV-N12N) to function. The amplifier supplies power and converts the optical signal into a usable NPN or PNP output.

Mechanical and Environmental Parameters

The LV-NH300 housing uses glass-reinforced plastic for the main case. This material provides dimensional stability across the operating temperature range of -10 to +55 °C (no freezing). Moreover, the sensor tolerates relative humidity from 35 to 85 % RH without condensation.

Installation Guide

Mounting the Sensor Head

First, secure the emitter and receiver using the included mounting brackets. The tightening torque for the bracket screws should not exceed 0.3 N·m. Over-tightening may damage the plastic housing. Next, align the zero line reference of the head with the mechanical datum of your fixture. The 30 mm detecting area tolerates vertical offset, but the emitter and receiver must remain parallel.

Connecting to the Amplifier

Open the dust cover on the amplifier and lower the hold lock lever. Then, insert the sensor head connector fully into the amplifier port. Finally, raise the hook and secure the lock lever before closing the dust cover. After connection, verify that the amplifier recognizes the LV-NH300 head. If the display shows an unexpected model code, initialize the amplifier settings and reconnect the head.

Alignment and Calibration

Power on the amplifier and confirm that light reaches the receiver. Align the emitter so the beam band sits against the zero line datum. Meanwhile, observe the amplifier's incident light intensity indicator. Adjust both units until the intensity reaches its maximum. For small targets, consider switching to FINE or HSP mode to improve response speed.

Packaging List

• LV-NH300 Sensor Head (Emitter and Receiver) × 1

• Mounting Bracket × 1

• Instruction Manual × 1

FAQ

Q1: Does the LV-NH300 work without an amplifier?
A: No. The LV-NH300 is a sensor head only. It requires an LV-N series amplifier unit for power and signal output. Without an amplifier, the head cannot operate or produce a detection signal.

Q2: What does the zero line type mean?
A: The LV-NH300 references its 30 mm beam band to a fixed zero line datum. This design simplifies edge position measurement and improves repeatability compared with a centered beam.

Q3: What is the maximum detecting distance of this model?
A: The LV-NH300 supports a detecting distance of 2000 mm while maintaining its 30 mm detecting area. Users should keep the emitter and receiver parallel across that span.

Q4: What is the difference between LV-NH300 and LV-NH100?
A: Both models share a 2000 mm range and 30 mm detecting area. However, the LV-NH300 adds a zero line reference and weighs 95 g, while the LV-NH100 uses a standard centered beam at 75 g.

Q5: How should I clean the sensor lens?
A: Gently wipe the lens covers with a soft, dry cloth. Avoid solvents or abrasive materials. Since the case is plastic, harsh chemicals may cause clouding and reduce optical performance.