Purchase the SICK 6037821 (WFM30-40N321) Fork Sensor. Features 30mm fork width, 4kHz high-speed switching, and NPN output. Rugged IP67 aluminum housing for precision.

SKU SICK-6037821 Category SICK WFM

Product Description

Product Overview

Part Number: 6037821
Model Name: WFM30-40N321
Sensor Family: WFM (Optical Fork Sensors)
Fork Width: 30 mm
Fork Depth: 42 mm
Switching Output: NPN
Switching Mode: Dark switching
Connection Type: Connector M8, 3-pin
Light Source: Visible red light
Enclosure Rating: IP67

Product Description

The SICK 6037821, part of the WFM fork sensor series, is a highly efficient and reliable solution for industrial detection tasks. Designed for “plug and play” operation, this sensor eliminates the need for complex alignment, as the sender and receiver are pre-aligned within a single, robust aluminum housing. This unit features a 30 mm fork width and a 42 mm depth, making it suitable for a variety of small-part detection and positioning applications.

Equipped with a visible red light source, the WFM30-40N321 provides an intuitive setup and easy alignment of objects within the detection path. Its high switching frequency of 4,000 Hz and rapid response time of 125 µs ensure precise performance even in high-speed production environments. The sensor is built to withstand harsh conditions with an IP67 enclosure rating, protecting it against dust and water ingress. Featuring a bright yellow receive indicator visible from 360 degrees, operators can monitor switching status instantly from any angle. This NPN, dark-switching model offers consistent, long-term stability and is a versatile choice for packaging, intralogistics, and electronic component manufacturing.

Key Performance Features

Plug-and-Play Setup: Ready for immediate operation with no complex alignment or sensitivity adjustments required.
High Switching Frequency: Supports high-speed processes with a 4 kHz frequency for reliable object detection.
360° Status Visibility: Integrated yellow receive indicator is visible from all angles for constant process control.
Rugged Construction: Durable aluminum housing and IP67 rating ensure high resistance to shock, vibration, and moisture.
Precision Detection: Capable of detecting very small objects with a minimum detectable object (MDO) size of 0.8 mm.

Ideal Applications

Part Detection: Accurate sensing of objects on automated production and assembly lines.
Packaging & Labeling: High-speed triggering for labeling machines and packaging equipment.
Intralogistics: Monitoring presence and positioning in conveyor systems and sorting facilities.
Electronics Manufacturing: Precise detection of small electronic components and circuit boards.
Small Object Counting: High-frequency counting of items in industrial processing.

Features

Functional principle	Optical detection principle
Dimensions (W x H x D)	10 mm x 50 mm x 59.5 mm
Housing design (light emission)	Fork shaped
Fork width	30 mm
Fork depth	42 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.