Optimize your production with the SICK WFM120-120N321 (6037834). Features 4kHz high-speed detection, 120mm fork width, NPN output, and IP67 rugged aluminum body.

SKU SICK-6037834 Category SICK WFM

Product Description

Product Overview

Model Name: WFM120-120N321
Part Number: 6037834
Product Family: WFM (Fork Sensors)
Functional Principle: Optical detection
Fork Width: 120 mm
Fork Depth: 124 mm
Switching Output: NPN
Switching Mode: Dark switching
Connection Type: M8 male connector, 3-pin
Housing Material: Rugged aluminum

Product Description

The SICK WFM120-120N321 (Manufacturer Part Number: 6037834) is a premium photoelectric fork sensor engineered for rapid deployment and exceptional precision in modern automated workflows. As part of SICK’s versatile WFM series, this sensor features an integrated sender and receiver within a single rugged aluminum housing, completely eliminating the time-consuming alignment processes typically associated with standard through-beam sensors. With a generous fork width of 120 mm and a depth of 124 mm, it is expertly designed to accommodate a wide variety of object sizes and diverse conveyor configurations in industrial settings.

Operating with a high switching frequency of 4 kHz and an ultra-fast response time of ≤ 125 µs, the WFM120-120N321 excels in high-speed environments where millisecond timing is critical for process efficiency. Its plug-and-play functionality means no manual adjustment is necessary, ensuring maximum operational safety and simplicity during commissioning. The clearly visible red light source facilitates easy alignment, while the 360° visible yellow receive indicator allows operators to verify switching status instantly from any vantage point. Rated at IP67 and utilizing NPN dark-switching output, this sensor is a highly reliable solution for presence checking, part counting, and object monitoring in demanding intralogistics, packaging, and high-volume manufacturing sectors.

Key Performance Features

High-Speed Processing: Switching frequency of 4 kHz and response time of ≤ 125 µs for fast cycle times.
Plug-and-Play Setup: No sensitivity adjustment or alignment required, enabling immediate operation.
Superior Visibility: Clearly visible red light spot and a 360° yellow status LED for simple installation and monitoring.
Robust Construction: Durable aluminum housing with an IP67 enclosure rating for use in harsh industrial environments.
Wide Passageway: 120 mm width and 124 mm depth to handle a broad range of object dimensions.
Reliable Detection: Minimum detectable object (MDO) of 0.8 mm ensures precision in small part detection.

Ideal Applications

Packaging Industry: Detecting container edges, monitoring fill levels, and counting labels.
Intralogistics: Presence checking of pallets, boxes, or totes on conveyor systems.
Automated Production: Counting small parts and monitoring object flow in high-speed lines.
Material Handling: Detecting the presence and position of components in assembly processes.
Quality Control: Checking for the presence of opaque or semi-transparent objects.

Features

Functional principle	Optical detection principle
Dimensions (W x H x D)	10 mm x 140 mm x 141.8 mm
Housing design (light emission)	Fork shaped
Fork width	120 mm
Fork depth	124 mm
Minimum detectable object (MDO)	0.8 mm
Light source	LED, visible red light
Adjustment	None

Mechanics/electronics

Supply voltage	10 V DC … 30 V DC ¹⁾
Ripple	< 10 % ²⁾
Current consumption	< 20 mA ³⁾
Switching frequency	4 kHz ⁴⁾
Response time	125 µs ⁵⁾
Stability of response time	± 15 µs
Switching output	NPN
Switching output (voltage)	PNP: HIGH = V_S – ≤ 1.5 V / LOW = 0 V NPN: HIGH = approx. V_S / LOW ≤ 1.5 V
Switching mode	Dark switching
Output current I_max.	100 mA
Initialization time	140 ms
Connection type	Connector M8, 3-pin
Protection class	III ⁶⁾
Circuit protection	U_V connections, reverse polarity protected Output Q short-circuit protected Interference pulse suppression
Enclosure rating	IP67
Weight	Approx. 80 g … 190 g ⁷⁾
Housing material	Metal, Aluminum

¹⁾ Limit values, reverse-polarity protected, operation in short-circuit protected network: max. 8 A.
²⁾ May not exceed or fall below U_v tolerances.
³⁾ Without load.
⁴⁾ With light/dark ratio 1:1.
⁵⁾ Signal transit time with resistive load.
⁶⁾ Reference voltage DC 50 V.
⁷⁾ Depending on fork width.