What is the power source for warning devices on carbon dioxide systems?

The power source for warning devices on carbon dioxide systems is the carbon dioxide agent itself. In many CO2 fire suppression systems, the release of the CO2 can trigger warning devices, such as alarms or indicators, which alert personnel that the system has been activated. This approach is essential for safety, as it provides immediate notification of CO2 discharge, which is crucial for both personnel awareness and response actions. The use of the CO2 agent as an activation signal ensures that warnings are directly linked to the status of the fire suppression system, providing timely alerts in critical situations.

Other options like batteries or electricity refer to traditional power sources that might be used in various systems, but in the context of CO2 systems, the unique characteristics of the gas itself serve as the critical trigger for warning devices. Manual activation pertains to controls operated by personnel rather than an automatic or inherent system response, which is not the direct power source for the warning devices in question.