Sequence Controller Manufacturer, Supplier We offer Sequence Controller for big size burners. The specifications of the Sequence Controller are given below: For Oil fired Burners / Boilers: 107-S-60, 107-S-30 (Standard models with pre-purge time of 60 Seconds and 30 seconds) 107-S-FO (controller for furnace oil) 107-M (suitable for Nestler Boilers) 107-TU LS-107 (suitable for IAEC make boilers) 150-P-6 (equivalent to MA-150 Controller) For Gas Fired Burners/Furnaces with UV flame sensing: Without Pilot Flame Proving: 307 - GI - S gas controller, with inbuilt UV amplifier 307-GE - S, gas controller, with external UV amplifier With Pilot Flame, Damper, Blower And Ignition Terminals: 307 - GID - P (inbuilt amplifier) & 307 - GE - P (with external amplifier) For Gas Fired Burners/Furnaces With Flame Rod Sensing: 207 - FR-S, with pilot valve option. 207 - FRD - AP21 without a pilot. (functionally compatible to LGB - 21)controller