LCR Hallcrest Ltd (UK)
Clark R & D (US)
Shanghai Cixi Instrument Co. Ltd (China)
Gapao Enterprise Ltd. (Taiwan)
Hangzhou Sejoy Electronics &. Instruments Co. Ltd. (China)
Davis Instruments Corp. Inc. (US)
Paul N. Gardner Company (US)
Doric Instruments - Advanced Industrial Systems Inc. (UK)
Palmer Wahl Instrumentation Group (US)