Explosion Proof Type Sampling Oxygen & Toxic Gas Detector Model : GTD-5100F Gas : Toxic(CO, Cl2, NH) & O2 Comm. : 4-20mA, RS-485, Relay, PoE App. : KCs, CE Explosion Proof Type Sampling Oxygen & Toxic Gas Detector Model : GTD-5000F Gas : Toxic(CO, CL2, NH3) & O2 Comm. : 4-20mA, RS-485, Relay App. : KCs, IECEx, ATEX, NEPSI, CE, KFI, KC, CPA Intelligent Diffusion Oxygen & Toxic Gas Detector Model : GTD-3000Tx Gas : Toxic(CO, CL2, NH3) & O2 Comm. : 4-20mA, RS-485, Relay App. : KCs, NEPSI, CE, KC, CPA Smart Diffusion Oxygen & Toxic Gas Detector Model : GTD-2000Tx Gas : Toxic(CO, CL2, NH3) & O2 Comm. : 4-20mA, HART App. : KCs, ATEX, IECEx, NEPSI, UL, KR, MED, ABS, BV, DNV, HART, SIL2, KC, CE, PESO, TRCU ex, CPA Transmitter Diffusion Oxygen & Toxic Gas Detector Model : GTD-1000Tx Gas : Toxic(CO, CL2, NH3) & O2 Comm. : 4-20mA App. : KCs, CE Sampling Oxygen & Toxic Gas Detector Model : GTD-5000 Gas : Toxic(CO, CL2, NH3) & O2 Comm. : 4-20mA, RS-485, Relay, PoE App. : CE, CPA Gas Receiver Combination Oxygen & Toxic Gas Detector Model : GTD-6000 Gas : Toxci(CO, CL2, NH3) & O2 Comm. : 4-20mA, RS-485, Relay