NTT Electronics, a Japan-based hardware company, is joined in the Series D round for the air quality measuring company by venture firms Focus Ventures, DAG Ventures, and China-based healthcare PE investment fund Mingxin China Growth Fund.

Hanwha Chemical Corp, a unit of Hanwha Group, reportedly takes a stake in photovoltaic company Crystal Solar.

The Stingray Digital Group-backed company said it would hire another 50 employees before the end of the year and open an office in Europe next year.

Alongside Google Ventures (led by its partner Joe Kraus) in the B round are venture capital firms Foundation Capital, which led the new round), and Baseline Ventures.

Samsung Ventures invested $5m in the US-based developer of mobile broadband gateways, taking it to $97m raised in its history, according to news provider VentureWire.

Venture firms Foundry Group, 500 Startups and Trinity Ventures join US-based advertising company Wieden + Kennedy backing the cloud cost monitoring start-up.

Intel Capital is joined in the round by venture firms Passport Ventures, FTV Capital and Steven Boal, co-founder of CashStar.