Intelligent Diffusion Oxygen & Toxic Gas Detector

Model : GTD-3000Tx
Gas : O2 & Toxic(CO, CL2, NH3 & etc)
Comm. : 4-20mA, RS-485, Relay
Approval : KCs

Information :

▷ 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 DC output signal
▷ Easy configuration of monitoring system by RS-485 Modbus isolated serial
data communication(Option)
▷ With the alarm unit
– Normal : Green LED
-Alarm : Red LED, Buzzer(95 dB)
-Trouble : Yellow LED
▷ Calibration and maintenance by one-man


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(166 page)
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 Tpye (Option)
Alarm signal output 250V 1A / 3-SPST relay contact (2-stage 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)
Cable/Distance Power + Signal cable : 3-wire 〉1.5sq (AWG16) / 2500m max
RS-485 data communication cable : 1pair (UL2919 RS-485) / 1000m max
Conduit connection G. Rc. NPT 1/2″ & 3/4″ (G 3/4″ : standard)
Mounting type 2″ Pole mount, Wall mount, Duct mount
Operating temperature -20℃ ~ +60℃
Operating humidity 5 ~ 99%.RH (non-condensing)
Operating power 18 ~ 31V DC (24V DC normal) / 200mA
Dimensions 156 x 196 x 110 (W x H x D)mm
Weight 2.0kg
Approval Explosion proof type (Ex d IIC T6, IP65) KCs
Explosion proof type (Ex d IIC T6 Gb) NEPSI
CE (EN 50270:2006)