GASTRON Model : GTF-1100U Detection Method : UV / IR Indicator : Status LED (Bi-Color : Red & Green) / Alarm LED (Red) Housing material : Aluminum alloy or Stainless steel Operation temperature : -40°C ~ 75°C Output signal : 0-20mA Analog current output / Alarm relay 1, Trouble relay 1 RS-485 Interface Explosionproof : Kcs, FM, IECEx, ATEX, TS, TRCU Ex, NEPSI