Key Features & Functionality
Ultrasonic Sensing Technology: Operates by emitting high-frequency sound waves and measuring the time for the echo to return. This makes it immune to optical interferences like dust, smoke, mist, and ambient light, and it can detect sound-absorbing (e.g., cloth), transparent (glass, liquid levels), and highly reflective (mirrors) objects with high reliability.

Long Sensing Range: Offers a substantial 70 cm (700 mm) sensing range, providing flexibility for medium-range applications.

Analog Output: This specific model is equipped with a 4...20 mA analog output. This allows it to provide continuous distance information to a PLC or controller, making it ideal for applications like fill-level monitoring, distance control, or positioning.

Teach-in Functionality: Features a simple push-button teach-in method for easy configuration of the switching points or the analog output range, significantly simplifying setup.

Robust Housing: Housed in a compact, rectangular plastic (PBT) housing with an IP67 protection rating, making it resistant to dust and water jets, suitable for harsh environments.

Fixed Cable Connection: The model suffix B413 indicates it comes with a 2 m long, PVC-jacketed fixed cable with a 4-pin M12 connector for power and output signals.

2. Typical Applications
Liquid Level Detection: Monitoring the fill level of tanks (water, chemicals, granular solids) from the top.

Pallet Detection & Height Monitoring: Detecting the presence of pallets or measuring stack height.

Transparent Object Detection: Reliably detecting bottles, glass panels, or plastic films on production lines.

Loop Control: Controlling the sag of material in web processing (e.g., paper, textiles, metals).

Object Positioning: Precisely positioning objects on a conveyor based on distance.

Technical Parameters
Parameter Specification
Article Number UFN3-70B413
Operating Principle Ultrasonic Sensor (Through-beam/Reflex)
Sensing Range 70 ... 700 mm
Dead Band 0 ... 70 mm
Default Setting Window mode (teachable)
Output 1 x Analog, 4...20 mA (3-wire)
Resolution < 0.2 mm
Linearity < ±1.5% of full scale value
Repeat Accuracy < 0.5% of full scale value
Response Time 50 ms (adjustable via teach-in)
Transducer Frequency ~ 300 kHz
Light Source LED, red
Power Supply 10 ... 30 V DC
No-Load Current ≤ 35 mA
Connection Fixed cable, 2 m, 4-pin M12 connector
Housing Material Plastic (PBT)
Protection Rating IP67
Operating Temperature -25 °C ... +70 °C
Key Feature Summary:

Reliable Detection: Immune to dust, light, and color; detects transparent objects.

Analog Output: 4...20 mA signal for continuous distance measurement.

Long Range: Up to 700 mm sensing capability.

Robust Design: IP67 rated plastic housing for tough environments.

Easy Setup: Simple push-button teach-in for configuration.