SpectraSensors, a Rancho Cucamonga, Calif. company that makes sensors to optically analyze natural gas, has raised $14 million in a third round of funding.

The technology is used to test energy levels and other factors that affect the gas' usage in refineries, for example.

The round was led by by Nomura’s New Energy & Clean Technology Ventures. Chevron's CTTV Investments also participated, as did existing backers American River Ventures, Blueprint Ventures and Nth Power.

An announcement is here.

The company has now raised $26.4 million