* Continuous detection of combustible, oxygen & toxic gas in explosion hazardous area with flame proof structure
* Self diagnosis function with built-in Microprocessor            
* Excellent selectivity by adapting detection principle only for oxygen & toxic gas        
* Superior performance for detecting gas below TLV
* Multi functions and high quality with low cost of ownership  
* Built-in Back light LCD display                 
* Auto calibration and program setting with magnet bar and LCD display          
* 4-20mA DC output signal                  
* Calibration and maintenance by one worker 

TRANSMITTER & LOCAL DISPLAY TYPE COMB. OXYGEN & TOXIC GAS DETECTOR
Model	GTD-200 Series
Measuring gas	Combustible gas (LNG, LPG, H2, Methane, Butane & etc)	Toxic gas (O2, CO, CL2, NH3 & etc)
Measuring type	Diffusion type
Measuring method	Hot wire semiconductor cell, Catalytic cell, Thermal conductivity cell	semiconductor cell, Electrochemical cell
Measuring range	0~2000ppm, 0~100% LEL, 0~100% Vol	Refer to ordering information
Response time	< 15sec / 90% scale	< 45sec / 90% scale
Accuracy	±3% / Full scale
Parameter controls	Non intrusive control with Magnet bar (calibration, maintenance, alarm setting)
Operation mode display	1-LED (Power)
Measuring value display	LCD display (Built in Back light 2-Line, 8 characters)
Output signal	Analogue output : Measuring output: 4-20 mA DC
	Maintenance output: 3 mA DC
	Calibration output: 2 mA DC
	Fault output: 0 mA DC
Cable / Distance	Power + signal cable: 3 wire (Above CVVSB 1.5sq ) / 2,500m max.
Conduit connection	1/2" & 3/4" PF, NPT (3/4" PF standard)
Mounting type	2" Pole mount, Wall mount, Duct mount
Operating temperature	-20∩ ~ +50∩
Operating humidity	5 ~ 99%.RH (non-condensing)
Operating power	18 ~ 31V DC (24V DC normal) / 250mA max.
	AC 110/220V(Option)
Dimensions	136 x 166 x 110 (W X H X D)	136 x 176 x 110 (W X H X D)
Weight	1.5 kg	2.1 kg
Approval	Flame proof type (Ex d IIC T6)