KLJ Instruments is an engineering design and development company specializing in providing timely, high-value solutions to test, instrumentation and control problems.

Our engineering staff has over 80 years experience in hardware and software design, including extensive work in the avionics and aerospace industry. KLJ engineers have worked with a wide range of ARINC and RTCA specifications including 419, 429, 453, 568, 575, 614, 629, 718, 708A, DO-181A and DO-185A.


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15385 S. 169 Highway
Olathe, Ks. 66062
Tel. 913.397.9973
Fax. 913.397.9976