Vibro-Meter's LS 120 Air Gap Monitoring Systems calculate air gaps between rotors and stators, by means of capacitive technology systems. These systems are integral accessories of comprehensive hydroelectric generators, since they provide accurate machine condition analyses. They are available in a wide array of size configurations, ranging from 2 to 33 mm. Their operating temperature rates range from -15 to 125°C (5 to 257°F).