Continuous detection of toxic gases and oxygen in explosion hazardous area with flame proof structure
Self diagnosis function with built-in Microprocessor
Excellent selectivity by adapting detection principle only for toxic gases & oxygen
Stable quality and proved detection principle for service life | Built-in back light LCD or OLED display
Auto calibration and program setting with a magnet bar
2-stage alarm, 1-trouble display and relay contact output
4-20mA (Current source or Sink) output signal
Easy configuration of monitoring system by RS-485 Modbus communication
With the alarm unit - Normal : Green LED -Alarm : Red LED, Buzzer(95 dB) -Trouble : Yellow LED
Calibration and maintenance by one-man
Superior performance for detecting gases below TLV

2. Thiết bị phát hiện khí độc hại GTD-3000Tx Gastron

INTELLIGENT & LOCAL DISPLAY TYPE OXYGEN & TOXIC GAS DETECTOR
Model	GTD-3000Tx
Measuring gas	O2 / Toxic gases (CO, CL2, NH3 & etc)
Measuring type	Diffusion type
Measuring method	Electrochemical cell, Semiconductor cell
Measuring range	Refer to Toxic Gas Measuring Range
Response time	< 45 sec / 90% scale
Accuracy	±3% / Full scale
Parameter control	Non intrusive control with a Magnet (calibration, maintenance, alarm setting)
Operation mode display	4-LED (Power, 2-stage alarm, 1-trouble)
Measuring value display	LCD display (Built in back light 2-Line, 16 characters) / OLED Type (Option)
Alarm signal output	2A@30VDC, 0.5A@125VAC (resistive load) / 3-SPST relay contact(2stage alarm, 1 trouble)
Output signal	Analog : Measuring signal : 4-20mA DC Maintenance signal : 4mA DC Calibration signal : 3mA DC Fault signal : 0mA DC Digital : RS-485 Modbus(Option)
Conduit connection	Standard : PF 3/4" Option : NPT 1/2", NPT3/4", M20 x 1.5P, M25 x 1.5P
Mounting type	2" Pole mount, Wall mount, Duct mount
Operating temperature	-20℃ ~ +60℃
Operating humidity	5 ~ 99%.RH (non-condensing)
Dimensions	156(W) x 196(H) x 110(D)mm
Weight	2.0kg

2. Thiết bị phát hiện khí GTD-3000Ex

INTELLIGENT & LOCAL DISPLAY TYPE FLAMMABLE GAS DETECTOR
Model	GTD-3000Ex
	Flammable gases (LNG, LPG, H2, Methane, Buthane & etc)
Measuring gas	Diffusion type
Measuring type	Catalytic cell	Hot wire semiconductor cell	Thermal conductivity cell
Measuring range	0~100% LEL	0~2000ppm	0~100% Vol
Response time	< 15sec / 90% scale
Accuracy	±3% / Full scale
Parameter control	Non intrusive control with a Magnet (calibration, maintenance, alarm setting)
Operation mode display	4-LED (Power, 2-stage alarm, 1-trouble)
Measuring value display	LCD display (Built in back light 2-Line, 16 characters) / OLED Type (Option)
Alarm signal output	2A@30VDC, 0.5A@125VAC (resistive load) / 3-SPST relay contact(2stage alarm, 1 trouble)
Output signal	Analog : Measuring signal : 4-20mA DC Maintenance signal : 3mA DC Calibration signal : 3mA DC Fault signal : 0mA DC Digital : RS-485 Modbus(Option)
	RS-485 data communication cable : 1 pair (UL2919 RS-485) / 1000m max
Conduit connection	Standard : PF 3/4" Option : NPT 1/2", NPT3/4", M20 x 1.5P, M25 x 1.5P
Mounting type	2" Pole mount, Wall mount, Duct mount
Operating temperature	-20℃ ~ +60℃
Operating humidity	5 ~ 99%.RH (non-condensing)
Dimensions	156(W) x 186(H) x 110(D)mm
Weight	1.8kg