1. Product Research:

   - Start by researching manufacturers or suppliers that offer single gas monitors with the features you mentioned: the use of two sensors for gas detection, two years of continuous battery runtime, easy battery replacement, a louder alarm sound (100dB @ 10cm), and selectable detection gases (CO, CO / H2 low, H2S, NO2, SO2).

2. Contact Manufacturers or Suppliers:

   - Contact the manufacturers or suppliers you identified and inquire about the availability of a single gas monitor with these specifications. Clearly communicate your requirements to them.

3. Request Quotations:

   - Request quotations for the single gas monitor that meets your criteria. Ensure that the warranty terms and any 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 verify that the device meets your expectations and that it's easy to operate.

5. Choose the Right Product:

   - Evaluate the options presented to you and choose the single gas monitor that aligns with your needs and budget.

6. Purchase and Delivery:

   - Place your order with the chosen manufacturer or supplier and confirm the delivery terms.

7. Installation and Training:

   - Once the device arrives, coordinate the installation and ensure that your team receives proper training on its operation and maintenance.

8. Implementation:

   - Deploy the single gas monitor in your desired application or environment.

9. Battery Replacement:

   - Familiarize yourself with the battery replacement procedure, and ensure that you have the necessary replacement batteries readily available.

10. Regular Maintenance:

   - Follow the manufacturer's guidelines for calibration and maintenance to ensure the continued accuracy and functionality of the device.

By following these steps and working closely with the manufacturer or supplier, you can arrange the first-ever single gas monitor with the specified features. Make sure to maintain proper documentation for warranty and service records to ensure the device's long-term performance.