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About Us

Gas Detection Warehouse (GDW) is the leading distributor of gas detection products in the United States. With over 30 years of technical experience, GDW provides customers with an easy and reliable solution for all gas detection needs. Our customers include petro chemical, chemical manufacturing, utilities and U.S. Government institutions. Gas Detection Warehouse is a division of Mid-State Instruments, a representative and distributor for a variety of gas detection equipment and thermal imaging.

We are based in San Luis Obispo, CA. Our main address is:

3485 Sacramento Dr., Suite C
San Luis Obispo, CA 93401

Call us at (866) 451-2257 or fax us at (805) 576-7629.

Visit for all your test and measurement needs!