Steven Levy Enterprises buys and sells new, unused, and used industrial surplus instrumentation and automation controls. Browse our inventory of used instrumentation and automation controls available for purchase. Instrumentation is used for indicating, measuring and recording physical quantities. Variables measured include temperature, pressure, flow, liquid level, velocity, density, and many others. In an automatic controlling operation the quantity can be controlled using the control signal sent by the computer to the controlling devices. Tell us what surplus instrumentation and automation controls you have for sale or call us at 713-910-4337.