and the required 1

While some gas valves allow for a manual reset sequence (cycling the temperature dial)

High-Temperature Durability: The 3/8-inch copper bulb and lead wire assembly are rated for 257°F

For contractors performing chiller maintenance or flow sensor replacement

Fireye 46-58 Quartz Lens 318820-201 and the required 1The Fireye 46 58 Quartz Lens is a critical replacement component designed specifically for Fireye 60 1290 scanners. This high transmission optical lens is engineered to withstand the extreme thermal environments found in industrial burner management systems. Featuring a 1 2" UN thread for a precise mechanical fit, the quartz construction ensures optimal ultraviolet (UV) signal transparency, allowing the scanner to accurately monitor flame presence