Leuze KRT18BM.V5/L6T-M12 Contrast Sensor
Leuze KRT18BM.V5/L6T-M12 contrast sensor delivers 13 mm operating range, RGB LED source, focused optics, IO-Link switching for automation. Manufactured by Leuze, this Leuze Contrast Sensor is part of the KRT Series and includes 13 mm ± 3 mm operating range, RGB LED light source, push-pull transistor outputs, M12 5-pin metal connector, vertical rectangular light spot, 12–30 V DC supply, and IP67/IP69K protection.
| Brand | Leuze |
| Product Type | Contrast Sensor |
| Product | KRT18BM.V5/L6T-M12 |
Leuze KRT18BM.V5/L6T-M12 Contrast Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Design | Cubic |
| Dimension (W x H x L) | 15 mm x 47 mm x 32.5 mm |
| Special version | Teach input |
| Operating range | 13 mm ± 3 mm |
| Beam path | Focused |
| Light Source | LED, RGB |
| Light spot size [at sensor distance] | 1 mm x 4 mm |
| Light spot orientation | Vertical |
| Type of light spot geometry | Rectangular |
| Light beam exit | Front |
| Wavelength | - |
| Supply voltage UB | 12 ... 30 V, DC |
| Number of teach inputs | 1 Piece(s) |
| Number of digital switching outputs | 2 Piece(s) |
| Switching output | Transistor, Push-pull |
| Switching principle | IO-Link / light switching (NPN) / dark switching (PNP) |
| Switching frequency | 15,000 Hz |
| Response time | 300 ms |
| Con:1 Function | Data interface Signal OUT Teach input Voltage supply |
| Type of connection | Connector |
| Thread size | M12 |
| Type | Male |
| Material | Metal |
| No. of pins | 5-pin |
| Housing material | Metal |
| Housing color | Silver |
| Type of fastening | Front mounting with thread Through-hole mounting Via optional mounting device |
| Type of display | Bar graph LED |
| Operational controls | Button(s) |
| Ambient temperature, operation | -40 ... 60 °C |
| Ambient temperature, storage | -40 ... 70 °C |
| Degree of protection | IP 67 IP 69K |
The KRT18BM.V5/L6T-M12 Leuze Through Hole Mounting Contrast Sensor is designed for precise contrast detection in industrial automation environments. The KRT18BM.V5/L6T-M12 operates with a 13 mm operating range, RGB LED light source, focused beam path, and IO-Link switching principle. It belongs to the KRT Series and supports stable signal processing using a metal M12 connector interface.
This contrast sensor is commonly used on conveyors, packaging lines, printing machines, and automated assembly systems. Teach input functionality allows fast adaptation to changing materials and print patterns. Through-hole mounting and front beam exit support secure installation and consistent detection on vertically oriented targets.
The KRT18BM.V5/L6T-M12 reflects Leuze’s approach to reliable industrial sensing. Its metal housing, bar graph LED display, and IP67/IP69K protection ensure dependable performance in harsh operating conditions. As part of the KRT Series, it is suitable for long-term use in demanding contrast detection applications.

