Elecrow SN04-P2 DC 3 Wire PNP NC 5-30 V Proximity Sensor Proximity Switch
Description
- Elecrow SN04-P2 DC 3 Wire PNP NC 5-30 V Proximity Sensor Proximity Switch
- Compact and lightweight, ideal for confined spaces
- Features high sensitivity and anti-interference capabilities
- Versatile, suitable for both indoor and outdoor use
- Detects magnetic metal within a 4mm distance
The Elecrow SN04-P2 DC 3 Wire PNP NC 5-30 V Proximity Sensor Proximity Switch is a compact metal proximity switch, measuring only 34 x 17.5 mm, making it suitable for installation in confined spaces. This device boasts high sensitivity and exceptional anti-interference capabilities. It features a PNP normally closed output and a detection distance of 4 mm, ensuring quick induction. The device is also IP67 waterproof, making it suitable for both indoor and outdoor use.
This proximity sensor is not only applicable in mechanical automation, security equipment, and car anti-theft operations, but it also finds utility in creative endeavors such as robot runway switching and speed measurement when paired with various control boards.

The device is characterized by its superior performance, high sensitivity, and strong anti-interference ability. Its small size allows for installation in narrow spaces, and its IP67 waterproof level ensures its functionality in a wide range of application scenarios, both indoors and outdoors.
The model, SN04-P2, is blue in color and is designed to detect magnetic metal. However, it should be noted that the detection distance decreases when it is a non-magnetic metal. The device has a set distance of 0-4 mm and operates at a voltage of 24V. The cable length is 110 mm, and the shell is made of metal, contributing to its net weight of 30g.
- 1x SN04-P2 Proximity Sensor
- 34 x 17.5 x 18 mm
- Model: SN04-P2
- Color: Blue
- Detect Object: Magnetic Metal (the detection distance decreases when it is non-magnetic metal)
- Detection distance: 4 mm
- Set distance: 0-4 mm
- Operating Voltage: 24 V
- Cable Length: 110mm
- Shell Material: Metal
- Waterproof: IP67
- Weight: 30 g
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Refund Policy
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Please review the Return Conditions, Return Exceptions and the process on How to Request a Return Authorization (RA) before initiating a return request.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
- A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
- The RA number is valid for 30 days. The returned item must be received within that period.
- The RA number must be included with the return.
- Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
- Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
- Refunds are processed within 7 days after receipt and inspection of the returned item.
- A $100 cleaning fee may apply to domestic robots returned in used or unclean condition.
- A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
- Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
- Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
- Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
- Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
- Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
- Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
- Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
- Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
- On-Demand Items — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfill a customer request.
- Professional & Specialized Equipment — See the Professional & Specialized Equipment Warranty page and Professional & Institutional Buyers (B2B) section in the Terms & Conditions.
How to Request a Return Authorization (RA)
While the same return policy applies, these orders require a separate contact process for returns.
- RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
- Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".