◤ Use flame-retardant structure to continuously detect combustible gases in explosion-hazardous areas
◤ Built-in microprocessor to realize self-diagnosis function
◤ According to a variety of detection principles, detect combustible gases from low to high concentrations
◤ Long-term stable quality and proven detection principle
◤ Built-in backlight LCD or OLED display
◤ Automatic calibration and program setting with magnetic stick
◤ Level 2 alarm, single fault display and relay contact output
◤ 4-20mA DC output signal
◤ RS-485 Modbus serial communication, easy to build monitoring system (optional)
◤ Equipped with alarm device
- Normal: Green LED
- Alarm: red LED, beep (95 dB)
- Fault: Yellow LED

◤ Single person calibration and maintenance

Model: GTD-3000Ex
Measuring gas :Flammable gas (liquefied natural gas, liquefied petroleum gas, hydrogen, methane, butane, etc.)
Measuring method :Diffusion type
Measuring method : Catalytic element Semiconductor element Thermal conductivity element
Response time :T90 < 15 seconds
Accuracy: ±3% / full scale
Mode of operation :Magnetic rod operation
Working mode display :4-LED (power, 2-level alarm, single fault)
Indication display :LCD display (built-in backlight double line, 16 characters)/OLED type (optional)
Alarm signal output :250V 1A / 3-SPST relay contacts (2-stage alarm, 1-fault)
Output signal Analog: Measurement signal: 4-20mA DC
Maintenance signal: 3mA DC
Calibration signal: 3mA DC
Fault signal: 0mA DC
Digital: RS-485 Modbus (optional)
Cable/distance Power cable + signal cable: 3-wire > 1.5 square (AWG16) / max: 2500m
RS-485 data communication cable: 1 pair (UL2919 RS-485) / maximum: 1000m
Conduit connection M20 x 1.5P, M25x1.5P, NPT ½", NPT ¾"
Mounting Type 2" Pole Mount, Wall Mount, Pipe Mount
Working temperature -20℃ ~ +60℃
Operating humidity 5 ~ 99%.RH (non-condensing)
Operating power 18 ~ 31V DC (normal: 24V DC) / 200mA
Dimensions 156 x 186 x 110 (W x H x D) mm
Weight 1.8kg