TB420 4-20mA Gas Sensor Module

Overview:

TB420 is an intelligent two-wire 4-20mA gas sensor module from German manufacturer EC Sense. It adopts high-reliability solid polymer electrochemical gas detection technology and intelligent algorithm design, complying with industry standards for gas safety monitoring.

Technical Parameters:

1. Detection Principle:Solid polymer electrochemical
2. Output Signal Interface:Two-wire 4-20mA (convertible to 40-200mV via external resistor)
3. Operating Voltage:9-24V DC
4. Current Consumption:3-22mA@24V DC
5. Power Consumption:<0.6W
6. Maximum Loop Resistance:<500Ω@24V DC
7. Protection:Reverse polarity protection
8. Operating Temperature:-40°C to +55°C
9. Operating Humidity:15-95%RH (non-condensing)
10. Pressure Range:Atmospheric pressure ±10%
11. Storage Temperature:0°C to 20°C
12. Dimensions (with sensor):45x35x11.9mm
13. Dimensions (without sensor):45x35x11.9mm
14. Weight (with sensor):7.8g
15. Weight (without sensor):7.1g
16. Packaging:ESD BAG (120x150mm)

Functional Features:

1. Factory Pre-calibration:Gas-calibrated at the factory, with calibration data stored in Flash memory. Users can use it directly or perform secondary calibration via EC Sense's calibration software, or calibrate 4-20mA signals directly.
2. Sensor Health Monitoring:Outputs sensor performance and lifespan indicators, as well as fault signals. Regularly provides real-time health status (normal operation, failure, maintenance needed, replacement required) with or without the target gas.
3. High Performance:Fast gas response, stable zero point without drift, strong EMI resistance, long-life gas sensor with anti-poisoning capability.
4. Environmental Protection:PCB coated with dust-proof and corrosion-resistant layers.
5. Development Efficiency:Shortens development time for gas monitoring instruments, reduces design costs and risks, accelerates production cycles by eliminating complex gas calibration processes, and improves instrument reliability and accuracy.
6. Industrial Compatibility:Standard 4-20mA industrial signal mode enables quick integration into monitoring systems, display meters, DCS, PLC, etc.

Application Fields:

Suitable for indoor and outdoor gas detection, including:

• Industrial gas safety monitoring
• Air quality monitoring
• Industrial process gas monitoring
• Semiconductor gas purification monitoring
  Provides real-time dynamic data for ambient gas detection.

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