Leuze KRTM 55/4.1221-S8 Contrast Sensor
Leuze KRTM 55/4.1221-S8 contrast sensor delivers 13 mm operating range, RGB LED illumination, and PNP transistor switching output functionality. Manufactured by Leuze, this Leuze Contrast Sensor belongs to the KRT Series and supports 13 mm ± 2 mm operating range, RGB LED light source, PNP transistor output, 10,000 Hz switching frequency, M8 4-pin connector interface, teach-button operation, and IP67/IP69K protection.
| Brand | Leuze |
| Product Type | Contrast Sensor |
| Product | KRTM 55/4.1221-S8 |
Leuze KRTM 55/4.1221-S8 Contrast Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Design | Cubic |
| Dimension (W x H x L) | 14 mm x 35.5 mm x 25 mm |
| Special version | Teach input Time function |
| Operating range | 13 mm ± 2 mm |
| Beam path | Focused |
| Light Source | LED, RGB |
| Light spot size [at sensor distance] | 1.5 mm x 6.5 mm |
| Light spot orientation | Vertical |
| Type of light spot geometry | Rectangular |
| Light beam exit | Front |
| Wavelength | - |
| Supply voltage UB | 10 ... 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 | 10,000 Hz |
| Response time | - |
| Con:1 Function | - |
| Type of connection | Connector |
| Thread size | M8 |
| Type | - |
| Material | Stainless steel |
| No. of pins | 4-pin |
| Housing material | Stainless steel |
| Housing color | - |
| Type of fastening | - |
| Type of display | LED |
| Operational controls | Teach button |
| Ambient temperature, operation | -30 ... 55 °C |
| Ambient temperature, storage | - |
| Degree of protection | IP 67 IP 69K |
The KRTM 55/4.1221-S8 Leuze M8 Connector 4-pin Contrast Sensor is designed for accurate contrast detection in industrial automation systems. The KRTM 55/4.1221-S8 operates with a 13 mm operating range, RGB LED light source, PNP transistor output, and 10,000 Hz switching frequency. It is part of the KRT Series and supports stable sensing performance in compact machine layouts.
This contrast sensor is commonly used in conveyors, packaging machines, labeling systems, and automated assembly lines. Its focused beam path and rectangular light spot allow consistent detection of printed marks, color differences, and surface contrasts. The M8 4-pin connector enables fast installation and reliable signal transmission in space-constrained industrial environments.
The KRTM 55/4.1221-S8 reflects Leuze’s focus on durable sensor construction and dependable operation. With stainless steel housing, IP67/IP69K protection, and simple teach-button configuration, it is suitable for continuous industrial use. As part of the Leuze KRT Series, it provides reliable contrast sensing for demanding automation applications.
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