Leuze KRT3CW.L3S1/6T-M8 Contrast Sensor
The Leuze KRT3CW.L3S1/6T-M8 contrast sensor delivers 14.5 mm operating range, white LED illumination, and push-pull transistor output signals reliably. Manufactured by Leuze, this Leuze Contrast Sensor belongs to the KRT Series and supports 10,000 Hz switching frequency, 0.05 ms response time, 12–30 V DC supply, focused beam optics, M8 metal connector, IP67/IP69K protection, and teach input operation for stable industrial automation detection.
| Brand | Leuze |
| Product Type | Contrast Sensor |
| Product | KRT3CW.L3S1/6T-M8 |
Leuze KRT3CW.L3S1/6T-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, White |
| 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 | 400 ... 750 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 | 0.05 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 KRT3CW.L3S1/6T-M8 Leuze Transistor Push-pull Output Contrast Sensor is a compact optical sensing device designed for contrast detection in industrial automation systems. This KRT3CW.L3S1/6T-M8 model operates with a 14.5 mm operating range and uses a focused white LED light source with rectangular light spot geometry. It provides a push-pull transistor output and operates on a 12–30 V DC supply. As part of the KRT Series, this Leuze contrast sensor supports consistent signal evaluation in automated machinery.
In industrial applications, the KRT3CW.L3S1/6T-M8 is installed on conveyors, packaging machines, labeling systems, and automated assembly equipment. It detects contrast marks, printed references, and surface variations on fast-moving materials with stable output behavior. The high switching frequency and short response time help maintain signal accuracy during high-speed operation, while the focused beam path and front light exit support precise mounting in compact automation layouts.
The KRT3CW.L3S1/6T-M8 represents Leuze’s structured approach to contrast sensor engineering for industrial environments. Its IP67 and IP69K protection ratings allow operation in demanding conditions, including washdown zones. With teach-button control, defined optical geometry, and standardized M8 connectivity, this Leuze Transistor Push-pull Output Contrast Sensor is suitable for long-term industrial automation applications requiring repeatable and stable contrast detection.

