1. Product Research:

   - Start by researching manufacturers or suppliers that offer gas detection systems with the specified features for continuous detection of flammable gases.

2. Contact Manufacturers or Suppliers:

   - Contact the manufacturers or suppliers you've identified and inquire about the availability of a gas detection system that meets your criteria. Clearly communicate your requirements for continuous detection of flammable gases in an explosion-hazardous area.

3. Request Quotations:

   - Request quotations for the gas detection system that aligns with your needs. Ensure that any warranty information and additional services, such as calibration and maintenance, are clearly outlined in the quotation.

4. Demo and Evaluation:

   - If possible, arrange for a product demonstration to ensure that the system meets your expectations and is user-friendly.

5. Choose the Right Product:

   - Evaluate the options presented to you and select the gas detection system that best fits your requirements and budget.

6. Purchase and Delivery:

   - Place your order with the chosen manufacturer or supplier and confirm the delivery terms, ensuring compliance with safety standards for the explosion-hazardous area.

7. Installation and Training:

   - Coordinate the installation of the gas detection system, ensuring proper installation in the explosion-hazardous area, and ensure that your team receives training on its operation and maintenance.

8. LCD or OLED Display:

   - Ensure that the system is equipped with the specified backlit LCD or OLED display for clear monitoring.

9. Auto Calibration and Magnet Bar:

   - Set up auto calibration and program settings using the magnet bar for ease of use.

10. Output Signals and Communication:

    - Configure the 4-20mA output signal and RS-485 Modbus communication as needed for your monitoring and data transmission.

11. Alarm Unit:

    - If the system includes an alarm unit, ensure it is properly set up with green, red, and yellow LEDs, as well as a buzzer for alarm and trouble notifications.

12. Calibration and Maintenance:

    - Ensure that the system can be calibrated and maintained by one person, following the manufacturer's guidelines.

By following these steps and working closely with the manufacturer or supplier, you can arrange the procurement of the gas detection system that meets your specific needs for continuous detection of flammable gases in an explosion-hazardous area. Maintain proper documentation for warranty and service records to ensure the long-term performance of the system.