Cross line hybrid laser module 25 mW GREEN, 12 - 30 VDC, adjustable focus, insulated

Cross line hybrid laser module 25 mW GREEN, 12 - 30 VDC, adjustable focus, insulated

Q: What is the difference between light red (635 nm) and red (650 nm)?

Both wavelengths appear red to the eye, but light red (635 nm) sits closer to the peak sensitivity of the human retina than red (650 nm). Specifically: 635 nm light appears roughly 2× brighter than 650 nm light at the same optical power. Practical effect: a 20 mW light-red module looks visually comparable to a 40 mW red module – with a lower laser class and longer diode service life. Light-red modules are slightly more expensive to manufacture but pay off in brighter environments or where a lower laser class is required.

Q: Glass optics vs. acrylic optics – when which?

Acrylic optics (PMMA plastic): low cost, light, dimensionally stable. Optically very good in standard applications, but temperature-sensitive – the refractive index changes with temperature, shifting the focus when variation exceeds ±5 °C. Perfectly adequate for indoor applications with stable conditions. Glass optics: heavier, more expensive, but temperature-stable. The refractive index stays nearly constant across wide temperature swings. Ideal for: outdoor mounting, unheated halls, machines with large temperature swings (welding, sawmills in summer/winter) and applications needing high repeat accuracy over long periods. Glass optics are available as an optional upgrade on our KLM and LLM modules.

Q: What does &bdquo;stabilized and peak-free power supply&ldquo; mean (cross-line laser)?

Cross-line laser modules contain sensitive laser diodes that can be destroyed within microseconds by voltage spikes and current fluctuations. Stabilized means: constant output voltage under load, no sag during switch-on. Peak-free means: no switching spikes or overshoot on the supply line. Always use a switching power supply with sufficient smoothing or a dedicated laser diode driver. Avoid unfiltered supplies, cheap USB power banks without stabilization, and supplies shared with switching relays or motors. The DC variant of our modules includes integrated reverse-polarity protection.

Q: When is the optional glass collimator worthwhile?

The standard version of our KLM modules ships with an aspheric acrylic lens – sufficient for stable indoor temperatures. With strongly fluctuating operating temperatures (more than ±5 °C variation) the acrylic lens can shift focus – beam width changes and sharpness suffers. The optional three-lens glass collimator is significantly more temperature-stable: glass barely expands, so the focus stays constant. Recommended for: outdoor mounting, unheated halls, machines with large temperature swings (welding, sawmills in summer/winter) and applications needing high repeat accuracy over long periods.

Q: How big is the cross at a given distance?

The cross size scales linearly with distance. With a 90° lens angle on a 12 mm module, 1 m distance gives a cross with roughly 2 m line length per axis. At 2 m distance this doubles to about 4 m per axis. With narrower angles (e.g. 35°) the cross is correspondingly smaller: 0.62 m at 1 m distance. Note: as distance grows the cross gets not only larger but also wider in line width (beam divergence). For especially sharp crosses at a known distance, the focus is adjusted on the module (brass ring at the front).

Q: Which colour for which surface (cross-line laser)?

Red (650 nm): standard choice, lowest cost, sufficient in moderately lit environments. Light red (635 nm): noticeably brighter than 650 nm red at the same power, good visibility on most surfaces. Green (520 nm): appears roughly 5–7× brighter than red – the choice for very bright environments, visible in daylight, large distances or dark surfaces. Blue (450 nm): ideal on wood, vegetation, greenish or yellow surfaces – where red and green get lost in the background. Light blue (488 nm): high contrast on warm-light spectra, a special colour for surfaces such as red-toned woods.

Q: Cross-line laser vs. line laser vs. positioning laser – what are the differences?

Line laser: projects one line – ideal for cutting lines, paths and boundaries. Cross-line laser: projects two perpendicular lines as a cross (90°) – ideal for centring and aligning. Positioning laser with DOE optics: projects a pattern (crosshair, circle, search field, square) through a diffractive optical element – the image has constant brightness across the entire area, but the lines are inherently wider than with classic lens optics. In short: line for straight markings, cross-line laser for precise centring with sharp lines, DOE positioning laser for evenly bright patterns including the outer areas.

Q: What is a cross-line laser?

A cross-line laser (also called cross hair laser) projects two perpendicular lines (90°) – a true line cross – onto a surface. Unlike a positioning laser with DOE optics, the cross here is generated by two classic cylindrical lenses. Benefits: sharp, bright lines across the full image width, daylight-capable – good visibility even in daylight and bright environments. Typical applications are workpiece centring on CNC, sawing and drilling machines, microscope reference crosses, inspection stations and operator guidance at manual workstations. Cross-line laser modules are available in red, light red (635 nm), green, blue and light blue – each with adjustable focus.

Cross angle: 15 deg Connection type: M8 connector Mount: Strong Pan/Tilt

KLMi-25-520: The KLMi Series 25 mW green (520 nm) cross line laser module projects a laser cross.

€311.78

Delivery time: In stock

Connection type

Flex cable 1m

M8 connector

M12 connector

Cross angle

15 deg

55 deg

75 deg

90 deg

Mount

No mount

Strong Pan/Tilt

Product number: KLMi-25-520.2

Cross line hybrid laser module 25 mW GREEN, 12 - 30 VDC, adjustable focus, insulated

Cross line laser module 25 mW Green (520 nm) – KLMi-25-520: A compact, high-performance cross line laser module from the KLMi series that projects two perpendicular lines as a bright laser cross. The mid-power class for longer distances and brighter environments. Focus and line position can be adjusted directly on the module.

Green laser cross (520 nm) with 25 mW
Numerous cross sizes selectable via selectable cross optics
Wide voltage input 12–30 VDC—also suitable for 24-V control systems
Isolated, potential-free housing, low heat generation

The KLMi modules combine a laser and NeoDrive hybrid driver electronics with a wide voltage input in an isolated 12-mm housing—eliminating the need for an external switching converter in the power supply line, and allowing multiple modules to be operated in parallel within a single machine. The high efficiency keeps heat generation low, so clamping the module in a mount is sufficient for cooling. A 3-lens glass collimator ensures optimal beam quality and good focusability, even over long distances.

Electrical Connection

The KLMi modules are equipped with a cable kink protector and a flexible tubing. The ends are designed as open ends with wire end ferrules, allowing for easy connection to any voltage source. Numerous connectors can be customized to meet specific customer requirements, and cable lengths of up to 100 m are available. The housing is insulated and carries no potential.

Technical Specifications

Laser power	25 mW
Wavelength / Color	520 nm green
Line angle / Cross size	selectable
Focus distance	approx. 5 cm to infinity
Line width	approx. 0.5 mm – approx. 3 mm
Angle of divergence	typ. < 0.5 mrad
Power supply	12–30 VDC / < 100 mA
Potential at the housing	Potential-free, isolated
Protective features	Reverse polarity protection, undervoltage protection, overvoltage protection
Cable length	Flexible cable approx. 100 cm, up to 100 m possible
Laser class according to device	Class 1/2
Dimensions	12 x 55 mm
IP rating	IP 40
Temperature Range	-15°C to +45°C
MTTF (Mean Time To Failure)	typ. > 25,000 h

Cross Size and Line Width

The size of the projected cross is determined by the cross angle selected at the time of purchase. The following angles are available for the KLMi-25-520:

Angle	Distance	Cross Size approx.
5°	1 m	8–9 cm
15°	1 m	25 cm
25°	1 m	40 cm
45°	1 m	85 cm
55°	1 m	100 cm
75°	1 m	170 cm
100°	1 m	230 cm

The line width (focus) is adjusted directly on the module—see the data sheet and video in the downloads.

Notes

Observe the laser class!
For more information on laser safety, click here.
Stabilized, peak-free power supply!
Please order the mount as well!

Options

Various connectors with customer-specific cable lengths
Pre-set focus for customer-specific distance

Downloads / Links

Connection type:	Flex cable 1m, M8 connector, M12 connector
Cross angle:	15 deg, 55 deg, 75 deg, 90 deg
Mount:	No mount, Strong Pan/Tilt

What is the difference between light red (635 nm) and red (650 nm)?

Both wavelengths appear red to the eye, but light red (635 nm) sits closer to the peak sensitivity of the human retina than red (650 nm). Specifically: 635 nm light appears roughly 2× brighter than 650 nm light at the same optical power. Practical effect: a 20 mW light-red module looks visually comparable to a 40 mW red module – with a lower laser class and longer diode service life. Light-red modules are slightly more expensive to manufacture but pay off in brighter environments or where a lower laser class is required.

Glass optics vs. acrylic optics – when which?

Acrylic optics (PMMA plastic): low cost, light, dimensionally stable. Optically very good in standard applications, but temperature-sensitive – the refractive index changes with temperature, shifting the focus when variation exceeds ±5 °C. Perfectly adequate for indoor applications with stable conditions. Glass optics: heavier, more expensive, but temperature-stable. The refractive index stays nearly constant across wide temperature swings. Ideal for: outdoor mounting, unheated halls, machines with large temperature swings (welding, sawmills in summer/winter) and applications needing high repeat accuracy over long periods. Glass optics are available as an optional upgrade on our KLM and LLM modules.

What does „stabilized and peak-free power supply“ mean (cross-line laser)?

Cross-line laser modules contain sensitive laser diodes that can be destroyed within microseconds by voltage spikes and current fluctuations. Stabilized means: constant output voltage under load, no sag during switch-on. Peak-free means: no switching spikes or overshoot on the supply line. Always use a switching power supply with sufficient smoothing or a dedicated laser diode driver. Avoid unfiltered supplies, cheap USB power banks without stabilization, and supplies shared with switching relays or motors. The DC variant of our modules includes integrated reverse-polarity protection.

When is the optional glass collimator worthwhile?

The standard version of our KLM modules ships with an aspheric acrylic lens – sufficient for stable indoor temperatures. With strongly fluctuating operating temperatures (more than ±5 °C variation) the acrylic lens can shift focus – beam width changes and sharpness suffers. The optional three-lens glass collimator is significantly more temperature-stable: glass barely expands, so the focus stays constant. Recommended for: outdoor mounting, unheated halls, machines with large temperature swings (welding, sawmills in summer/winter) and applications needing high repeat accuracy over long periods.

How big is the cross at a given distance?

The cross size scales linearly with distance. With a 90° lens angle on a 12 mm module, 1 m distance gives a cross with roughly 2 m line length per axis. At 2 m distance this doubles to about 4 m per axis. With narrower angles (e.g. 35°) the cross is correspondingly smaller: 0.62 m at 1 m distance. Note: as distance grows the cross gets not only larger but also wider in line width (beam divergence). For especially sharp crosses at a known distance, the focus is adjusted on the module (brass ring at the front).

Which colour for which surface (cross-line laser)?

Red (650 nm): standard choice, lowest cost, sufficient in moderately lit environments. Light red (635 nm): noticeably brighter than 650 nm red at the same power, good visibility on most surfaces. Green (520 nm): appears roughly 5–7× brighter than red – the choice for very bright environments, visible in daylight, large distances or dark surfaces. Blue (450 nm): ideal on wood, vegetation, greenish or yellow surfaces – where red and green get lost in the background. Light blue (488 nm): high contrast on warm-light spectra, a special colour for surfaces such as red-toned woods.

Cross-line laser vs. line laser vs. positioning laser – what are the differences?

Line laser: projects one line – ideal for cutting lines, paths and boundaries. Cross-line laser: projects two perpendicular lines as a cross (90°) – ideal for centring and aligning. Positioning laser with DOE optics: projects a pattern (crosshair, circle, search field, square) through a diffractive optical element – the image has constant brightness across the entire area, but the lines are inherently wider than with classic lens optics. In short: line for straight markings, cross-line laser for precise centring with sharp lines, DOE positioning laser for evenly bright patterns including the outer areas.

What is a cross-line laser?

A cross-line laser (also called cross hair laser) projects two perpendicular lines (90°) – a true line cross – onto a surface. Unlike a positioning laser with DOE optics, the cross here is generated by two classic cylindrical lenses. Benefits: sharp, bright lines across the full image width, daylight-capable – good visibility even in daylight and bright environments. Typical applications are workpiece centring on CNC, sawing and drilling machines, microscope reference crosses, inspection stations and operator guidance at manual workstations. Cross-line laser modules are available in red, light red (635 nm), green, blue and light blue – each with adjustable focus.