The new VS1 vibration monitor from Electro-Sensors minimizes the risk of catastrophic equipment failure and expensive shutdowns by detecting both under and over vibration conditions that could signal trouble. Small, light and economical, the new VS1 also features exclusive LED indicators that tell operators at a glance if a machine needs attention or preventative maintenance. The VS1 is ideal for safeguarding fans, blowers, crushers, compressors, chillers, mixers, large motors, gearboxes, turbines, conveyors, pumps, blenders, reciprocating engines and vibratory conveyors. The VS1 is capable of sensing under-vibration as well as over-vibration, allowing operators to create an alarm condition for either fault condition, which may indicate wear on key machine components, or simply that the machine has stopped working. At only 12 ounces, the VS1's lightweight adds little mass to the machine vibration being measured and therefore improves sensing accuracy. The small size (4.0" x 2.6" x 1.6") cast aluminum NEMA 4X enclosure allows it to fit in smaller spaces than existing vibration monitors, making installation of the VS1 a straightforward task. The VS1 also features an adjustable relay set point that can be used for machine shutdown or operator warning. The range of vibration velocities can be adjusted from 0.10 to 2.20 inches per second rms, with a set point delay that can be adjusted from 1 to 10 seconds to prevent false trips. The unit detects velocities in a frequency band from 10 Hz to 1,000 Hz. The alarm relay is a SPDT type rated at 5A, 30 Vdc, and 5A, 250 Vac. Power requirements are 24 Vdc at 30 ma. The three LEDs indicate Power (on), Vibration (normal), and Alarm (under or over vibration).