20VDC OPTICAL FLAME DETECTOR BASIC NAME FLAME MODIFIER NAME OPTICAL TYPE FLAME BURNER USE POWER 20VDC FREQUENCY 60 HZ AMBIENT TEMPERATURE – 20 TO 60 DEGREES C DEGREE OF PROTECTION IP-67 ADDITIONAL REQUIREMENTS SEE COMMERCIAL REFERENCE DURAG-D-LE 603-UAF-P OBS: – MEASURING RANGE 280 ~ 410 NM. – AIR TRAP CONNECTION 1/2. BSP. – AIMING TUBE CONNECTION 1.1/4. BSP.