Ventura County tech companies inked big sales, swung back to profits and traded at heavy volumes in early April.

Oxnard-based CalAmp Corp., a communications gear firm, signed contracts for $15.2 million in new wireless networks sales, sending shares up. After paring itself down to basics and tightening its manufacturing to deal with heavy losses, Camarillo-based sensor maker Interlink Electronics showed a profit for the last quarter.

Here’s a closer look at recent developments at each company.

The full version of this article is only available in the print edition. To view everything the Business Times offers, see this week’s print version or SUBSCRIBE to the print edition for $49.99 today.