สวิทช์ควบคุมการเผาไหม้ "SIEMENS"LAL1.25 ,LAL2.25

Oil burner controls
• With or without air pressure supervision for checked air damper control
• Flame supervision with
– photoresistive detector QRB1..., or
– blue-flame detector QRC1..., or
– selenium photocell detector RAR...