Description
The McDonnell & Miller Model 61 is a reliable infrared flame detector engineered for demanding commercial and industrial combustion applications. Utilizing a lead sulfide (PbS) sensing cell, this detector accurately identifies both pilot and main flame signals, making it an ideal solution for combination burner systems and dual fuel applications where dependable flame supervision is critical.
Designed for straightforward installation and long-term performance, the Model 61 features a 3/4″ NPT threaded mounting connection and a generous 48″ lead length that simplifies wiring in tight or remote burner configurations. Its wide operating temperature range of -20°F to 125°F ensures consistent detection performance across a variety of indoor and outdoor environments.
The detector ships complete with a magnifying lens and sulfide cell, providing everything needed for a complete installation right out of the box.
Key Features
- Lead sulfide (PbS) infrared sensing cell for accurate flame detection
- Detects both pilot flame and main burner flame
- Suitable for combination burner and dual fuel applications
- 3/4″ NPT threaded mounting for easy installation
- 48″ lead length for flexible wiring access
- Operating temperature range: -20°F to 125°F
- Includes magnifying lens and sulfide cell
Specifications
- Model: 61
- Sensor Type: Lead Sulfide (PbS) Infrared
- Mounting Connection: 3/4″ NPT
- Lead Length: 48″
- Operating Temperature Range: -20°F to 125°F
- Application: Combination / Dual Fuel Burner Systems
- Includes: Magnifying Lens, Sulfide Cell
Applications
- Commercial and industrial boilers
- Dual fuel burner systems
- Combination gas/oil burner applications
- Pilot and main flame supervision







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