Technical Specifications
Parameter Specification
Article Number WTB140-N430
Sensing Principle Photoelectric, Background Suppression
Sensing Range 20 - 140 mm
Light Source Red visible LED, 650 nm
Light Spot Diameter ~8 mm at 140 mm
Resolution < 1 mm
Repeat Accuracy < 0.5 mm
Response Time < 1 ms
Switching Frequency 500 Hz
Output Type NPN, NO/NC selectable
Power Supply 10-30 V DC
Current Consumption < 30 mA
Output Current ≤ 100 mA
Connection M8 connector, 4-pin
Operating Temperature -25 °C ... +60 °C
Storage Temperature -40 °C ... +70 °C
Dimensions (L × W × H) 40 × 20 × 15 mm
Weight Approx. 25 g
Protection Rating IP67
Key Features
1. Precision Background Suppression

True background suppression technology

Consistent detection independent of target color

Excellent background discrimination

Reliable operation on reflective surfaces

2. Compact Robust Design

Stainless steel housing (1.4301)

High chemical and corrosion resistance

Suitable for harsh environments

Space-saving installation

3. High-Speed Performance

Fast response time (< 1 ms)

High switching frequency (500 Hz)

Excellent repeat accuracy (< 0.5 mm)

Temperature-compensated operation

4. User-Friendly Operation

Teach-in functionality for easy setup

NO/NC output selectable

Bright LED status indication

Simple mounting and alignment

Electrical Characteristics
Switching State Indicator: Red LED

Short-circuit Protection: Yes

Reverse Polarity Protection: Yes

Voltage Drop: < 2.5 V

Leakage Current: < 10 μA

Ambient Light Immunity: ≤ 30000 Lux

Mechanical Specifications
Housing Material: Stainless steel 1.4301

Window Material: Optically clear polycarbonate

Mounting: M12 threaded barrel

Alignment: Visual alignment aid

Cable Entry: M8 × 1 connector

Environmental Specifications
EMC Immunity: EN 60947-5-2

Vibration Resistance: 10-55 Hz, 2 mm amplitude

Shock Resistance: 30 g, 11 ms duration

Chemical Resistance: Resistant to oils, coolants, and cleaning agents

Performance Characteristics
Start-up Time: < 100 ms

Hysteresis: < 10% of sensing distance

Temperature Drift: < 0.1% of sensing range/°C

Warm-up Time: < 5 minutes

Application Areas
Packaging Machinery: Product detection and counting

Automotive Assembly: Part presence verification

Electronics Manufacturing: Component detection

Pharmaceutical Packaging: Blister pack verification

Material Handling: Object positioning

Food Processing: Package presence detection