61-6521 Fireye Scanner

Overview

The Fireye 61-6521 is a high-performance 45RM4 infrared flame scanner specifically engineered for use with fiber optic assemblies in industrial combustion environments. It is a self-checking, flame-sensing device that monitors the presence or absence of flames by detecting modulation within the visible and near-infrared range. Housed in a durable die-cast aluminum casing, it is designed to operate reliably in challenging conditions where direct line-of-sight is obstructed by burner components or excessive heat.

Features

• Self-checking infrared photodetector ensures continuous safety and signal integrity.
• 16-position rotary frequency selector allows for precise tuning to the target flame’s “flicker” frequency, effectively discriminating against background radiation and adjacent burners.
• Fiber optic compatibility enables monitoring in high-temperature or physically restricted areas.
• 10-segment LED bargraph provides immediate visual feedback on flame signal strength to simplify installation and alignment.
• Electronic shutter assembly replaces mechanical components for improved reliability and longevity.
• Solid-state circuitry housed in a rugged aluminum enclosure for industrial durability.

Specifications

• Model Number: 61-6521 (45RM4 series)
• Detection Technology: Infrared (Visible and Near-IR range)
• Power Requirement: 24 VDC (+10%, -15%)
• Current Rating: 100 mA
• Operating Temperature: -13 F to 150 F (-25 C to 65 C)
• Humidity Range: 0 percent to 95 percent R.H. non-condensing
• Mounting: Specifically designed for fiber optic bundle integration
• Electrical Connection: Quick Disconnect

Applications

The 61-6521 is primarily used in complex burner systems where the scanner must be located away from the burner front due to heat, lack of space, or the presence of tilting burners. It is highly effective for monitoring “dirty” fuels such as pulverized coal, heavy oil, and natural gas in power plants, industrial process boilers, and electric utility furnaces. It is fully compatible with Fireye 25SU3 and 25SU5 series flame amplifiers to provide comprehensive ignition and flame failure protection.