Key Parameters
Parameter Specification
General
Product Type Ultrasonic Sensor
Product Family WTB9 Series
Order Code WTB9-3P2411S14
Functional Principle Ultrasonic (Pulse Ranging)
Sensing Range 200 mm ... 6000 mm (6 meters)
Dead Band 0.2 m ... 0.4 m
Reference Target 200 x 200 mm square plate
Accuracy < 0.3 % of measured value or ± 5 mm (whichever is greater)
Beam Angle ≈ 5° (Very narrow, focused beam)
Response Time 80 ms (min. for analog output)
Switching Frequency 5 Hz
Electrical Data
Operating Voltage 10 ... 30 V DC
Current Consumption ≤ 80 mA (no load)
Outputs
Analog Output 1 x 4...20 mA (3-wire, current loop)
Switching Output 1 x PNP (NO/NC programmable via software)
Short-circuit Protection Yes
Reverse Polarity Protection Yes
Connection
Connector Type 5-pin M12 connector
Pin Assignment 1: +Vs, 2: Analog Output, 3: 0V, 4: Switching Output, 5: IO-Link/Sync
Mechanical Data
Housing Style Rectangular, metal housing
Housing Material Zinc die-cast
Face Material Plastic (PUR)
Protection Rating IP67 / IP69K (Dust-tight, protected against immersion, and high-pressure/steam cleaning)
Mounting Via integrated mounting holes or bracket
Weight Approx. 250 g
Environmental Conditions
Operating Temperature -40 °C ... +70 °C
Storage Temperature -40 °C ... +85 °C Typical Applications
Bulk Material Level Monitoring: Measuring the fill level in very large silos, hoppers, or open storage areas for materials like gravel, sand, or grain.

Crane and Hoist Positioning: Providing position feedback for overhead cranes and lifting equipment in warehouses and steel mills.

Large Vehicle Detection: Monitoring the presence and position of trucks, rail cars, or ships in logistics yards and ports.

Outdoor Applications: Suitable for use in variable weather conditions due to its wide temperature range and robust housing.

Process Control: Continuous level measurement of liquids or solids in large industrial processes.