Roc2Loc, developer of wireless security systems used on construction sites, brought in $2 million of an anticipated $5 million first round of funding. The new money will be used to continue testing sensors that will — if activated by suspicious motion or temperature change — send alert text messages or emails to site managers’ cell phones.

This technology also has applications in the trucking industry, as VentureWire points out. Sensors can be placed so that drivers are immediately notified if anyone opens their trucks’ doors.

The San Francisco-based company plans to launch these products by May and achieve profitability by the end of 2009. The recent tranche of funding came from Claremont Creek Ventures. The other $3 million is expected to come in over the next two weeks.