Leuze KRT3CM.L3S2/6T-M8 Contrast Sensor
The Leuze KRT3CM.L3S2/6T-M8 contrast sensor supports 14.5 mm operating range, RGB LED light, and dark switching NPN logic detection. Manufactured by Leuze, this Leuze Contrast Sensor belongs to the KRT Series and provides 10,000 Hz switching frequency, 300 ms response time, push-pull transistor output with light and dark switching modes, 12–30 V DC supply, focused beam optics, M8 metal connector, and IP67/IP69K protection.
| Brand | Leuze |
| Product Type | Contrast Sensor |
| Product | KRT3CM.L3S2/6T-M8 |
Leuze KRT3CM.L3S2/6T-M8 Contrast Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Design | Cubic |
| Dimension (W x H x L) | 11.4 mm x 34.2 mm x 18.3 mm |
| Special version | Teach input Time function |
| Operating range | 14.5 mm ± 2 mm |
| Beam path | Focused |
| Light Source | LED, RGB |
| Light spot size [at sensor distance] | 1.5 mm x 4 mm [14.5 mm] |
| Light spot orientation | Vertical |
| Type of light spot geometry | Rectangular |
| Light beam exit | Front |
| Wavelength | B: 470 nm G: 525 nm R: 640 nm |
| Supply voltage UB | 12 ... 30 V, DC, Incl. residual ripple |
| Number of teach inputs | 1 Piece(s) |
| Number of digital switching outputs | 1 Piece(s) |
| Switching output | Transistor, Push-pull |
| Switching principle | Light switching (PNP)/dark switching (NPN) |
| Switching frequency | 10,000 Hz |
| Response time | 300 ms |
| Con:1 Function | Signal OUT Teach input Voltage supply |
| Type of connection | Connector |
| Thread size | M8 |
| Type | Male |
| Material | Metal |
| No. of pins | 4 -pin |
| Housing material | Plastic |
| Housing color | Red |
| Type of fastening | Via optional mounting device |
| Type of display | LED |
| Operational controls | Teach button |
| Ambient temperature, operation | -40 ... 60 °C |
| Ambient temperature, storage | -40 ... 70 °C |
| Degree of protection | IP 67 IP 69K |
The KRT3CM.L3S2/6T-M8 Leuze Dark Switching NPN Contrast Sensor is designed for accurate contrast detection in industrial automation systems. This KRT3CM.L3S2/6T-M8 model operates with a 14.5 mm operating range and an RGB LED light source supporting multi-color contrast recognition. It uses a push-pull transistor output configured for dark switching NPN logic and functions on a 12–30 V DC supply. As part of the KRT Series, this Leuze contrast sensor delivers stable electrical behavior for automated processes.
In industrial applications, the KRT3CM.L3S2/6T-M8 is commonly used on conveyors, packaging machines, labeling equipment, and automated assembly lines. It reliably detects contrast differences, print marks, and surface variations on fast-moving materials. The focused beam path and defined switching logic help ensure consistent detection results, while the high switching frequency supports precise signal timing in continuous automation environments.
The KRT3CM.L3S2/6T-M8 reflects Leuze’s structured engineering approach for contrast sensors in demanding industrial conditions. With IP67 and IP69K protection, it is suitable for harsh and washdown environments. Its standardized M8 connector, teach-button configuration, stable voltage supply handling, and defined switching behavior make this Leuze Dark Switching NPN Contrast Sensor a dependable solution for long-term industrial automation use.

