MDF Instruments | 785 followers on LinkedIn. We have been crafting stethoscopes, sphygmomanometers, and neurological hammers since 1971. | MDF Instruments designs, manufactures, and distributes a premium diagnostic line of instruments for healthcare professionals. We've been handcrafting stethoscopes, sphygmomanometers, and reflex hammers in the MDF artisan tradition since 1971. MDF Instruments is a US-based, branded manufacturer with wholly owned production facilities and international sales and service offices in Westlake Village CA, Copenhagen DK, Düsseldorf, Germany, Ontario Canada, Los Angeles US and Taipei Taiwan.