Rievtech from VSL Rievtech Micro Programmable Logic Controllers Low cost PLCs for all your small to medium sized control and data acquisition systems. Provided and supported in the UK by Verborn Systems Limited. Not sure which of our PLC's meet your project needs? Use our PLC finder to narrow things down a little! PLC Finder Software, Firmware & Manuals What We Do Whether you are looking for low cost PLC's or HMI's, we have got you covered. PLC Range HMI Range Accessories