Product Overview

The SICK UM18 ultrasonic sensor is a high-functionality device designed for reliable object detection in diverse industrial environments. With a sensing range up to 1,300 mm and four configurable ranges, the UM18 offers flexibility across a wide array of applications. The sensor features a robust metal or plastic housing that ensures durability under demanding ambient conditions. Using acoustic time-of-flight measurement, it emits an ultrasonic pulse that reflects off detected objects, enabling precise distance calculation. This technology provides virtually unlimited use regardless of object color, gloss, or transparency. With multiple output options including analog, PNP/NPN switching, and push-pull outputs via IO-Link, the UM18 delivers adaptable signal transmission for seamless integration into various control systems.

Key Features and Technology

The UM18 employs acoustic time-of-flight measurement to detect objects by emitting an ultrasonic pulse that reflects off a target. The sensor measures the total acoustic time of flight (t2), calculates distance using the formula: Distance = speed of sound × t2 / 2, and converts it into a precise output signal. This method ensures consistent performance across different materials and surface properties. The sensor is capable of detecting objects regardless of color, gloss, or transparency—making it ideal for complex environments where optical sensors may fail. Its interference-proof signal transmission enhances system reliability, while the time-of-flight principle provides accurate, repeatable measurements without dependency on object reflectivity.

Technical Characteristics

The UM18 ultrasonic sensor offers four sensing ranges up to a total of 1,300 mm, providing extensive flexibility for different application needs. It supports both analog and switching outputs—PNP/NPN or push-pull—with the option for one or two outputs via IO-Link. The sensor can be configured with either a combination of analog and push-pull switching output or standalone switching outputs. With LED status feedback, users receive immediate visual confirmation of operational status. The housing is available in metal or plastic, enabling use in harsh ambient conditions. All measurements are based on acoustic time-of-flight principles, ensuring high accuracy and consistency across diverse materials.

Configuration and Integration

The UM18 sensor integrates at the fieldbus level through IO-Link, offering seamless communication to enhance system productivity. This enables automatic parameterization during device replacement, increasing machine availability by reducing setup time. Interference-proof signal transmission ensures reliable operation in noisy industrial environments. Automatic sensor configuration according to manufacturing processes simplifies integration and improves process consistency. The combination of analog and push-pull switching outputs with IO-Link provides versatile control options for complex automation tasks. This level of integration reduces wiring complexity and supports intelligent system diagnostics.

Operating Environment

The UM18 sensor is designed to operate in demanding ambient conditions thanks to its metal or plastic housing. It is suitable for use in environments with varying temperatures, humidity levels, and dust exposure. The sensor’s acoustic measurement technology remains effective regardless of object surface characteristics such as color, gloss, or transparency. Its interference-proof signal transmission ensures stable performance even in electrically noisy settings. While specific environmental limits are not detailed, the robust housing design supports reliable operation in industrial applications where physical conditions may vary significantly.

Industrial Applications

The UM18 ultrasonic sensor is ideal for a broad range of industrial applications requiring consistent object detection. Its ability to detect objects regardless of surface properties makes it suitable for use in packaging, material handling, and assembly lines. The scanning range capability allows accurate detection over long distances, while the multiple output options support integration into diverse control systems. Applications include level monitoring, presence detection, and position sensing in environments where optical sensors may fail due to material or surface variations. Its high functionality and reliable performance ensure dependable operation across various production processes.