Assertion: detector | /r/HasProperty | expensive
Facets:
value: as ionization alarms
type: MANNER
Source sentences:
text: And although these detectors are twice as expensive as ionization alarms (it's no wonder they're less popular), data from the National Institute of Standards and Technology has found that photoelectric alarms can detect smoke 20 to 50 minutes faster
text: The sensors require a continuous power draw, so they may be expensive to run.