Honeywell 21CH38-18 Limit Switch | SPDT 4A 28VDC | Enclosed Roller

Product Overview

• The Honeywell 21CH38-18 is a premium Enclosed Limit Switch for industrial use.
• This Non-Illuminated device ensures high reliability in rugged automation environments.
• It uses a Roller Actuator for smooth mechanical interface and long-term durability.
• The SPDT contact form provides versatile switching logic for complex control systems.
• Compact Panel Mount design allows for easy integration into existing machinery.

Technical Specifications

• Brand: Honeywell
• Model: 21CH38-18
• Product Type: Enclosed Limit Switch
• Contact Form: SPDT
• Current Rating: 4 A
• Voltage Rating: 28 VDC
• Operating Force: 6 lb to 12 lb
• Actuator Style: Roller
• Termination: Wire Lead
• Weight: 0.737 Kg
• Temperature Range: Wide industrial operating thermal limit
• Interference Resistance: High electromagnetic immunity for stable signals

Installation and Maintenance

• Secure the 21CH38-18 switch onto your panel using standard mounting holes.
• Connect the Wire Leads to your controller following the circuit diagram.
• The Roller mechanism requires no regular lubrication or special tools.
• Check the actuator alignment periodically to maintain peak switching accuracy.
• The enclosed housing simplifies cleaning and protects against factory debris.

Applications and Diagnostics

• Commonly used in aerospace and heavy industrial positioning tasks.
• Excellent for conveyor systems to detect part presence or travel limits.
• Used in valve control to confirm open or closed positions.
• The SPDT configuration allows for easy loop-back diagnostic testing.
• Fast response times help identify mechanical timing issues in real-time.

Shipping and Warranty

• Warranty: Industry-standard 12-month quality guarantee for peace of mind.
• Logistics: Fast global shipping via FedEx, UPS, and DHL.
• Package List: One Honeywell 21CH38-18 switch with factory leads.
• Certification: Built to meet global industrial safety and performance standards.

Frequently Asked Questions

• Can I use this for AC loads? This model is specifically rated for 28 VDC systems.
• Is the switch sealed? Yes, the Enclosed Switch design protects internal contacts.
• What mounting style is used? It uses a convenient Panel Mount setup.