At my last job, we bought about 20 Mastech supplies, some were a "linear" model, and some were "switchers". AFIK, they all had smooth current limiting, and somewere dual power supplies. I think most were the 0-30V, 0-3A models.
I frequently used them in constant-current mode to charge batteries, and in constant-voltage mode to power robotics controllers and misc circuits. The current-limiting saved burning something up when initially powering un-debugged systems...