Leuze KRTM 20M/C-20-6526-S12 Contrast Sensor
Leuze KRTM 20M/C-20-6526-S12 contrast sensor delivers 20 mm operating range, RGB LED light, and PNP transistor output switching applications. Manufactured by Leuze, this Leuze Contrast Sensor belongs to the KRT Series and supports 20 mm ± 2 mm operating range, RGB LED light source, PNP transistor switching output, 50,000 Hz switching frequency, 12–30 V DC supply, stainless steel construction, and IP67/IP69K protection.
| Brand | Leuze |
| Product Type | Contrast Sensor |
| Product | KRTM 20M/C-20-6526-S12 |
Leuze KRTM 20M/C-20-6526-S12 Contrast Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Design | Cubic |
| Dimension (W x H x L) | 30 mm x 80 mm x 53 mm |
| Special version | Autocollimation Time function |
| Operating range | 20 mm ± 2 mm |
| Beam path | Focused |
| Light Source | LED, RGB |
| Light spot size [at sensor distance] | 1.2 mm x 4 mm |
| Light spot orientation | Vertical |
| Type of light spot geometry | Rectangular |
| Light beam exit | On face |
| Wavelength | - |
| Supply voltage UB | 12 ... 30 V, DC |
| Number of teach inputs | 1 Piece(s) |
| Number of digital switching outputs | 1 Piece(s) |
| Switching output | Transistor, PNP |
| Switching principle | Light/dark switchable |
| Switching frequency | 50,000 Hz |
| Response time | - |
| Con:1 Function | - |
| Type of connection | Connector |
| Thread size | M12 |
| Type | - |
| Material | Stainless steel |
| No. of pins | 5-pin |
| Housing material | Metal |
| Housing color | - |
| Type of fastening | - |
| Type of display | LED |
| Operational controls | Membrane keyboard |
| Ambient temperature, operation | -25 ... 60 °C |
| Ambient temperature, storage | - |
| Degree of protection | IP 67 IP 69K |
The KRTM 20M/C-20-6526-S12 Leuze Metal Housing Material Contrast Sensor is designed for reliable contrast detection in industrial automation systems. The KRTM 20M/C-20-6526-S12 operates with a 20 mm operating range, RGB LED light source, PNP transistor output, and 50,000 Hz switching frequency. It is part of the KRT Series and is used where consistent optical detection is required.
This contrast sensor is commonly used in conveyors, packaging machines, labeling equipment, and automated assembly lines. Its focused beam path and rectangular light spot enable stable contrast recognition on fast-moving materials. The stainless steel and metal housing improve durability and support long-term operation in demanding industrial environments.
The KRTM 20M/C-20-6526-S12 reflects Leuze’s focus on dependable sensing technology. With IP67/IP69K protection, robust construction, and stable electrical output, it is suitable for continuous industrial use. As a member of the Leuze KRT Series, it provides consistent and accurate contrast detection across automation applications.

