Vibration switches are used to guard against destructive levels of vibration by tripping a limit relay or switch that has a user adjustable limit. They are used on large motors, pumps, compressors, fans, centrifuges, blowers and cooling towers.

Model 550 Vibration Switch
Monitors Velocity (In/Sec)
4-20 MA Output
Replaces Mechanical Switches
Two limits
Weatherproof
Automatic Alarm & Shutdown
Adjustable Time Delays
Solid State Reliability
Alarm Test Function
120 to 60,000 RPM
Model 550-X Vibration Switch
Explosion Proof
4-20 MA Output
Adjustable Time Delays
For Oil & Gas and Petrochemical Applications
Automatic Alarm & Shutdown
120 to 60,000 RPM
Solid State Reliability
Cost Effective

The Economical Alternative to Mechanical Switches

Advantages of Velocity

Damage potential to your machine is proportional to velocity
Model 550's produce a calibrated signal proportional to vibration velocity
Mechanical switches trip due to acceleration

10 Times Better Resolution - More Effective Control

Mechanical switch amplitude ranges cover 0-5 G's
Trip resolution is 0.1 G @ 1800 RPM, 0.01G @ 600 RPM
1/2 turn on the adjustment screw represents 0.3 G
(3 times less the resolution accuracy needed at 600 RPM and 30 times less the resolution accuracy needed at 1800 RPM).

Model 550's vibration levels increase in 0.1 inch/second steps
Accuracy is better than 5% of setting
Resolution is at least 10 times better than what is needed.