Honeywell Iris UV/IR Viewing Head. The S550BE has a 1-inch NPTF process connection and a 1/2-inch NPTF bleed connection. Ships with connector. . Application|Combustion Flame Monitoring#Item|UV/IR Viewing Head with Quick Disconnect #Brand|Honeywell-Iris#SKU|S550BE#Supply Voltage|22-26 VDC from Processor #UV Gain Adjustment|0-99# IR Gain Adjust|0-699#Approvals|CSA 4X/IP67 Rating #Description|For use with RP52X and RP53X signal processors