The Pepperl+Fuchs UB400-F77-E0-V31 is a high-precision ultrasonic proximity sensor designed for non-contact object detection across a 25–400 mm range, with an adjustable working range of 40–400 mm to suit diverse automation needs. Its miniature rectangular housing (23 x 12 x 31 mm, 10 g) and M8 x 1 connector enable seamless integration into space-constrained environments, such as robotic grippers or compact machinery. A yellow LED indicator provides clear feedback on switching status and teach-in activation, simplifying setup via the sensor’s programmable input—ideal for customizing detection ranges through a 3-second low-level pulse. The IP67 rating ensures protection against dust and water immersion, while its lightweight polycarbonate casing resists impacts, making it suitable for tight industrial layouts where precision and adaptability are critical.
Engineered for consistent operation, this sensor utilizes 300 kHz ultrasonic technology to detect objects regardless of material, color, or surface texture, offering an edge over inductive alternatives in complex setups. It operates on a 20–30 V DC power supply (12–20 V DC with reduced sensitivity) with an NPN normally open (NO) output, delivering 200 mA load current with short-circuit and overload protection. Key features include a ±1 mm repeat accuracy, 5 Hz switching frequency, and 4 mm hysteresis to minimize signal fluctuations, ensuring stable performance in high-vibration environments. The sensor’s 300 m maximum cable length supports remote installations, while temperature compensation (0.17%/K) maintains accuracy across its -25°C to 70°C operating range, making it reliable for both cold storage and moderate-temperature industrial applications.
The UB400-F77-E0-V31 meets international standards (EN/IEC 60947-5-2:2020) and carries UL certification (Class 2 power source), ensuring global compatibility in automation systems. Its robust construction—with an epoxy/hollow glass sphere transducer and polyurethane foam insulation—resists chemical exposure and mechanical stress, while the IP67 rating safeguards against harsh conditions like dust storms or wet production lines. The sensor’s versatile mounting (any position) and factory-set 400 mm switching point streamline integration into applications such as conveyor belt monitoring, packaging machinery, or automated material handling, where reliable detection of small or irregular objects is essential. Backed by Pepperl+Fuchs’ industrial expertise, it offers long-term durability with minimal maintenance, embodying excellence in compact ultrasonic sensing solutions.
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Attribute
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Specification
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General Information
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Product Type
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Ultrasonic Proximity Sensor
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Manufacturer
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Pepperl + Fuchs
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Model Number
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UB400-F77-E0-V31
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Sensing Characteristics
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Sensing Principle
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Ultrasonic (300 kHz)
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Sensing Range
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25–400 mm (adjustable 40–400 mm)
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Repeat Accuracy
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±1 mm
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Hysteresis
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4 mm
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Dead Band
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0–25 mm
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Target Material
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Universal (metallic/non-metallic, any color or texture)
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Electrical Data
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Supply Voltage
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20–30 V DC (12–20 V DC with 10% sensitivity reduction)
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Output Type
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NPN (NO)
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Load Current
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≤200 mA
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Voltage Drop
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≤2 V
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Reverse Polarity Protection
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Yes
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Short-Circuit Protection
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Pulsing
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Mechanical Data
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Housing Material
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Polycarbonate
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Connection Type
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M8 x 1 connector (4-pin)
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Dimensions
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23 mm (length) x 12 mm (width) x 31 mm (height)
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Weight
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10 g
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Mounting
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Any position
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Environmental Data
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Ambient Temperature Range
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-25°C to +70°C
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Storage Temperature Range
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-40°C to +85°C
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Humidity
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35–95% RH (non-condensing)
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Protection Class
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IP67
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Certifications
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CE
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Yes (EN/IEC 60947-5-2:2020)
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UL
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Yes (Class 2 power source)
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CCC
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Exempt (rated ≤36 V DC)
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Additional Features
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LED Indicators
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Yellow (switching status and teach-in activation)
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Teach-In Function
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Programmable via 3-second low-level pulse
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Temperature Compensation
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Yes (0.17%/K temperature influence)
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Cable Length
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Up to 300 m
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Applications
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Primary Use Cases
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Conveyor belt monitoring, robotic gripper object detection, packaging machinery, automated material handling, level detection in bins/tanks
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Industry-Specific Applications
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Electronics (PCB detection), automotive (component sorting), logistics (collision avoidance), food & beverage (sanitary environments)
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Product Tags:
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UB400-F77-E0-V31 Ultrasonic Sensor 400mm Range IP67 Analog Output Pepperl+Fuchs Images
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