Intelligent Flammable Gas Detector

Model : GTD-3000Ex
Gas : Combustible(CH4, H2 & etc.)
Comm. : 4-20mA, RS-485, Relay
Approval : KCs, CE, NEPSI

Information :

▷ Continuous detection of flammable gases in explosion hazardous area with flame proof structure
▷ Self diagnosis function with built-in Microprocessor
▷ Detection gas from low to high concentration owing to various detection principle
▷ 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 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-3000Ex
Measuring gas Flammable gases (LNG, LPG, H2, Methane, Butane & etc)
Measuring type Diffusion type
Measuring method Catalytic cell  /  Hot wire semiconductor cell  /  Thermal conductivity cell
Measuring range  0~100% LEL /              0~2,000ppm            /            0~100% Vol
Response time 〈10 sec
Accuracy ±1.5% / 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 Power + Signal cable : 3-wire 〉1.5sq (AWG16)
RS-485 data communication cable : 1 pair (UL2919 RS-485)
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) / 250mA
Dimensions 156 x 186 x 110 (W x H x D)mm
Weight 1.8kg
Approval Explosion proof type (Ex d IIC T6, IP65) KCs
Explosion proof type (Ex d IIC T5 Gb) NEPSI
CE (EN 50270:2006)