By Reuters Staff 2 Min Read (Reuters) - Owlet Baby Care Inc, a maker of baby monitoring devices, will go public through a merger with a blank-check firm backed by private equity firm Sandbridge Capital, in a deal that values the equity of the combined entity at about $1.4 billion. The deal includes a $130 million private investment anchored by Fidelity Management & Research LLC, Neuberger Berman Funds and funds affiliated with PIMCO and OrbiMed, among others, the companies said on Tuesday. Sandbridge Acquisition Corporation, a special purpose acquisition company (SPAC), raised $200 million through an initial public offering last year. Founded in 2012, Owlet’s flagship baby monitoring device, Owlet Smart Sock, uses pulse-oximetry technology to track the heart rate, oxygen levels and sleep patterns of babies.