Con Edison Co. (ConEd) is installing 376,000 smart-technology natural gas detectors for customers in New York City and Westchester County.

The utility, which serves 1.1 million area gas customers, said that the distribution of the detectors follows a successful pilot in which ConEd provided 9,000 detectors. Those leak detectors sounded 250 alarms since the first installations in October 2018.

The company expects to install all the detectors by 2025 under a $130 million program at no charge to the customer.

“This is a life-saving technology,” said Senior Vice President for Gas Operations Marc Huestis. “These detectors urge anyone nearby to leave and prompt a swift response from our gas crews and the local fire department so that they can shut off the gas, find the leak...