美国DL Instruments 
DL Instruments designs, manufactures, sells, and services a range of electronic instrumentation for industrial, commercial, and laboratory use.

The Tech Notes describe the applications and theory of operation of the instruments, and discuss their functions and features in the context of actual use.

DL Instruments supplies software for selected programmable instruments. Download the most recent versions of the support and application files.

DL Instruments was formerly the Instrumentation Division of Ithaco, Inc.