SICK WTB9L-3P2491 Photoelectric Sensor (1058151)

The SICK WTB9L-3P2491 is a highly precise photoelectric proximity sensor featuring advanced background suppression, perfect for detecting even the smallest objects across a broad 25 mm to 400 mm sensing range. Built with a compact, rugged VISTAL® housing and visible red laser light, it delivers superior performance for industrial environments demanding high accuracy and reliability.

Technical Specifications

Model: WTB9L-3P2491 SICK
Part Number: 1058151
Product Type: Photoelectric Proximity Sensor
Series: W9 Series
Application: Indoor industrial detection
Functional Principle: Photoelectric proximity sensor with background suppression
Sensing Range: 25 mm to 400 mm
Type of Light: Visible red light
Light Source: Laser
Light Spot Size (at 230 mm): Ø 0.9 mm
Wavelength: 650 nm
Laser Class: 2 (IEC 60825-1 / CDRH 21 CFR 1040.10 & 1040.11)
Adjustment: 5-turn Potentiometer
Special Applications: Detecting small objects
Housing Design (Light Emission): Rectangular
Mounting Hole: M3
Dimensions (W x H x D): 12.2 mm x 52.2 mm x 23.6 mm

Electrical Interface

Supply Voltage: 10 V DC to 30 V DC
Ripple: < 5 Vpp
Current Consumption: 30 mA
Switching Output: PNP
Output Function: Complementary
Switching Mode: Light/dark switching
Output Current (Imax): ≤ 100 mA
Response Time: ≤ 1 ms
Switching Frequency: 500 Hz
Connection Type: Male connector M12, 4-pin
Circuit Protection:

• A (Short-circuit protection)
• B (Reverse polarity protection)
• C (Overload protection)

Mechanical Data

Housing Material: Plastic, VISTAL®
Optics Material: Plastic, PMMA
Weight: 13 g
Enclosure Rating: IP66, IP67, IP69K

Ambient Conditions

Operating Temperature: –10 °C to +50 °C
Extended Operating Temperature: –30 °C to +55 °C
Storage Temperature: –30 °C to +70 °C
Operating Environment: Indoor industrial

Safety-Related Data

Protection Class: III
Certifications:

• European Conformity (CE)
• ECOLAB Certified
• UL Listed (NRKH.E181493)

Scope of Delivery

Included: Sensor unit (WTB9L-3P2491)
Not Included: Mounting accessories, connection cables

Applications

Ideal For:

• Precision detection of small objects
• Tight-space industrial automation
• High-accuracy background-suppressed sensing
• Harsh environments requiring IP69K protection

Key Features & Benefits

✅ Advanced Background Suppression: Eliminates detection errors from backgrounds.

✅ Precise Laser Spot: Ultra-small 0.9 mm light spot for highly accurate object detection.

✅ Wide Sensing Range: Reliable performance from 25 mm to 400 mm.

✅ Robust Build: VISTAL® plastic housing with IP66/IP67/IP69K protection ratings.

✅ High Switching Speed: Up to 500 Hz with ≤ 1 ms response time.

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