The 3049-64 and 3049-115 mercury flame sensors are designed as universal replacements for types currently used on cycling pilot ignition systems. they will replace sensors used in thermocouple type (slip-in) pilot burners. the bulbs on both flame sensors have additional grooves to accept retaining clips that allow the bulb to match most existing types.
Bulb style are designed to fit with various OEM application|Adapter fitting to allow use of these mercury flame sensor with competitive burner are packed with control identified|Mercury flame sensor can only be replaced be cross referencing the original mercury flame sensor model number, they can not be replaced be gas valves model number|1450 deg F maximum temperature at bulb tips|Type D panel|48 in element
White-Rodgers Mercury Flame Sensor, Series: 3049, (2) 1/4 in Spade Terminals and (1) Pin Terminal, Import