I have a couple of high speed vertical pump that have a history of rapid failure rates. Sooner or later one of these things might slip throught the cracks. Failure to catch one of these pumps could lead to some serious problems. They are pumping some really nasty stuff. I would like to put some kind of a trip switch on these units. The control loop extends to an on off switch near the pumps. These units also have a 115volt supply fed to and stand by oil pump that could be used to feed a small device. I would rather go with a electricly controled trip rather than a mechanical device. I would also like a time delay for start up. The unit would also need to display an alarm or have the ability to send a singnal to the control board as an indication of the type of failure.
I'm looking for ideas.
As always cost is an issue.

Not sure if this is helpful, but we used to have some permantly mounted sensors (not sure if they were velocity probes or accelerometers) that were marketed by Bentley Nevada that fed back to a "receiver box" in the field that displayed overall levels. There was also a BNC connector that data could be pulled off of the box with a portable data collector. If memory serves me right, these things could be programmed to look at certain frequency bands that were user set. They also few back to DCS and gave operators a trendable overall level that would alarm when a certain alert or fault was reached. I don't think it would shut the equipment down, but it might be possible to program it to do so. I can't say for sure that they (Bentley Nevada) still offers this or if it is even pertinent to your situation, but just thought I'd lay it on the table.

Just found this at the Bentley Nevada website. It's the equipment that I was talking about.

http://www.bentleynevada.com/prod/products/machineryprot1900.htm

Take a look at Hardy Instruments 5500 Series warning and trip devices. Reliable and not expensive, and they use std xducers.

www.hardyinst.com

Std disclaimer - I have no commercial connection to Hardy Instruments

I have some trip switches installed that were made by F.W. Murphy. Very dependable.
http://www.fwmurphy.com/products/vibe_time_over/vibration_time.htm