At Scientific Instrument Services, Inc. (SIS), we provide supplies and services for mass spectrometers (MS), gas chromatographs (GC) and liquid chromatographs (LC). We publish a scientific supply catalog, provide customservices (e.g. filament repair/source cleaning) and precision custom machining for the scientific/medical markets, design and manufacture instrumentation (thermal desorption / cryo-trap / MS probe systems), and distribute mass spec software. Established in 1978, we operate from NJ and PA (US) and have dealers worldwide.