EMX – CNTX-30-TP / CNTX-35-TP / CNTX-30-0

CNTX Contrast Sensor

Brand : EMX

The EMX CNTX-30-TP / CNTX-35-TP / CNTX-30-0 are high-speed contrast sensors designed for precise detection of color and grayscale differences in industrial applications such as printing, packaging and converting. These sensors use a broad-spectrum white LED light source and advanced optical technology to detect contrast variations between marks, labels and surfaces with high accuracy. With a fast response time and high switching frequency, the CNTX series enables reliable detection even in high-speed production lines.

The series offers flexibility through different variants, including auto teach models (TP versions) for quick setup and display based models (CNTX-30-0) for enhanced monitoring and manual adjustment. The CNTX-35-TP provides a smaller spot size for higher precision applications, while the CNTX-30 variants offer a standard spot size for general use. All models support dual outputs (PNP/NPN and analog 0 to 5 V) and feature robust industrial construction, making them suitable for demanding environments requiring accurate contrast detection.

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Specifications

Specification Detail
Sensor Type Contrast sensor (color and grayscale detection)
Light Source Broad-spectrum white LED (400 – 700 nm)
Sensing Distance Approx. 28 mm
Spot Size 3 mm (CNTX-30-TP / CNTX-30-0), approx. 1 mm (CNTX-35-TP)
Depth of Field ±3 mm
Response Time Approx. 25 µs
Switching Frequency Up to 40 kHz
Gray Scale Range 0 to 50 levels
Output Type Auto-detect PNP/NPN (discrete)
Analog Output 0 to 5 V DC (20 mV resolution)
Supply Voltage 10 to 24 V DC
Operating Current Approx. 60 mA
Configuration Teach-in (TP models) or manual/display adjustment
Electrical Connection M12 connector, 4-pin
Housing Material Industrial plastic or metal variant (model dependent)
Protection Rating IP65
Operating Temperature -20 °C to +55 °C

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