Seimens has recalled 57,000 temperature and humidity sensors after receiving four reports from schools and hospitals that the sensors overheated and caused a fire, the U.S. Product Safety Commission said.
The four reported fires caused minor damage, and no injuries were reported.
Siemens Industry Inc.'s wall-mounted Q-series sensors are designed to control heat, air conditioning and humidity in commercial buildings, hospitals and schools.
The sensors were sold by Siemens sales offices, partners, resellers and installers from June 2007 through Aug. 2012 for $200 to $400. The white or beige sensors come in three designs, with a blank cover, a digital display screen, or a digital display and door.