◤ With flame retardant structure, continuous detection of toxic gas and oxygen in explosion hazard zone
◤ Built-in microprocessor to realize self-diagnosis function
◤ Adopt the detection principle suitable for toxic gas and oxygen to create excellent selectivity
◤ Long-term stable quality and proven detection principle
◤ Built-in backlight LCD or OLED display
◤ Use magnetic stick for automatic calibration and program setting
◤ Level 2 alarm, single fault display and relay contact output
◤ 4-20mA DC output signal
◤ RS-485 Modbus serial communication (optional)
◤ Equipped with alarm device
- Normal: Green LED
- Alarm: red LED, beep (95 dB)
- Fault: Yellow LED
◤ Single person calibration and maintenance

Technical Parameters

Model :GTD-3000Tx
Measuring gas :Oxygen/toxic gas (carbon monoxide, chlorine, ammonia, etc.)
Measuring method :Diffusion type
Measuring method :Electrochemical, semiconductor
Response time :T90 < 45 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 G. Rc. NPT 1/2" and 3/4" (G 3/4": standard)
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 196 x 110 (W x H x D) mm
Weight 2.0kg