Are there battery operated heat-only detectors?

Battery only heat detector ？yes, we have，we also called standalone heat detector！
Battery only heat detector operation is fairly simple. The battery only heat detector may activate when ambient temperature reaches a pre-defined point (fixed temperature heat detector) or when ambient temperature rises by a pre-defined amount, over a prescribed amount of time (rate-of-rise heat detector).Battery only heat detectors may employ either of these methods, or in some cases, both. Rate-of-rise battery only heat detectors can usually be reset, therefore can be used again. Fixed temperature battery only heat detectors, once they’ve been activated, usually need to be replaced. I believe this is why many battery only heat detectors employ both technologies. You can safely test the rate-of-rise aspect of the detector, then use it again, and as long as you don’t activate the fixed temperature portion the device is still good. With a fixed temperature battery only heat detector, if you successfully test it, you have to replace it.

Installing heat detectors is very important for detecting fires as quickly as possible. Many rooms cannot use conventional smoke detectors due to the regular presence of smoke. However, heat sensors make for excellent alternatives. 

Heat detectors are usually used in spaces where the environment may predictably cause false alarms for smoke detectors, but where fire is still a real possibility that you want to monitor for. Garages, and kitchens are 2 of the places where heat detectors (battery only heat detectors are ok)are often employed instead of, or in conjunction with, smoke detectors.

so buy your battery only heat detectors from SUMRING !