Knight Fire & Security D25 – Grade 2 5-Screw Surface Contact With a Spring Tamper Switch

Knight Fire 5-Screw Surface Contact With a Spring Tamper Switch

The Knight Fire & Security D25 is a professional-grade 5-screw surface contact designed for high-security installations. Built to Grade 2 security standards, it features a spring tamper switch that detects removal from the fitting surface, providing enhanced security against tampering. The versatile 5-terminal design includes two nickel screws to govern the reed switch, plus three spare brass screws for custom wiring configurations.

Ideal for both residential and commercial security systems, the D25/B ensures long-lasting performance with a durable high-impact polystyrene body and a ferrite or Alnico V magnet for reliable operation.

Key Features & Benefits:

• Security Grade 2 Certified – Tamper switch detects removal for enhanced protection.
• Versatile 5-Screw Design – Two nickel screws for the reed switch and three spare brass screws for custom configurations.
• Reliable Performance – Designed with high-quality rhodium contacts for consistent switching and durability.
• Easy Installation – Supplied with fitting screws for secure mounting.
• Temperature Resistant – Operates in extreme conditions from -40°C to +50°C.
• Available in Two Colours – White (D25) and Brown (D25B) to suit different installation aesthetics.

Technical Specifications:

• Grade: 2
• Environmental Class: II
• Contact Type: Single Reed
• Tamper Protection: Spring tamper switch detects removal
• Operating Gap: 20mm (approx.)
• Material: High-impact polystyrene (D25) / ABS plastic (D25B)
• Magnet Type: Ferrite or Alnico V
• Contact Material: Rhodium
• Voltage Range: 1–100V DC / 125V AC max
• Switching Current: 500mA max DC / 500mA max AC
• Operating Temperature: -40°C to +50°C
• Fixings: Supplied with fitting screws
• Colour Options: White (D25) / Brown (D25B)

Why Choose the D25?

Designed for professional security applications, the D25 5-Screw Surface Contact is an installer-friendly, high-performance solution for security systems requiring reliable detection and tamper protection. The inclusion of spare terminals allows for custom configurations, making it a versatile choice for various setups.