Which two continuous-loop fire detection systems do not perform tests if an element is broken?

The Kidde system and the Fenwal system are both types of continuous-loop fire detection systems that operate on the principle of monitoring the temperature within specific areas. In these systems, if an element (sensor) becomes broken or compromised, the system does not conduct functional tests to detect that failure, which means that the detection capability may not be reliable until the issue is addressed.

This characteristic is critical in applications such as powerplants, where early fire detection is vital for safety. The lack of self-testing capability in the event of a broken element can potentially delay the response to a fire hazard if maintenance is overlooked.

In contrast, other systems might include self-diagnostic features that can sense when elements fail and perform appropriate tests to notify operators of any issues. Hence, understanding the differences in how various systems manage failures is essential for effective fire detection in demanding environments like powerplants.