Water monitoring

I have been looking at the Vaisala MM70. I have never tried it myself, but the write up looks promising.

Dreebs,
I have been looking the Vaisala Also. However I have previus good experiences with the Hydac Aqua Sensor. This unit reads percentage of saturation of water at a certain temperature; this means that this unit is capable of tell you exactlly when water is gettin in your systems. The AS also have comunication capabilities to a PLC.

Sorry. I compltlly gorget to give you the equipment URL, here you will find more information.
http://www.hydacusa.com/fluid/as.htm

Is it really the percentage or irrespective of percenatge if there is water contamination of the oil. Secondly does the system runs for 24X7?There are transducers sensing water and I HAVE SEEN ONE INSTALLED IN a 2000 T OIL HYD press.
regards

If you are just looking for a moisture sensor for the purpose of detecting moisture ingress where analysing quantities is not important then there are a number of units available. In Australia, units start form about $AU3000.00.
Try:
www.pall.com
www.hiac.com
www.hydac.com
www.ucc.co.uk
Most units give a real time display and can be fitted with remote alarms that are triggered when a preset level is exceeded.
There are plenty of units out there and it definately pays to shop around. I hope this is of some help.

In addition to the MC post, some units cam be conected to a PLC. This upload the readings to virtually averywere you want it.
Other options are on-off switches, this feature can be use in conjuction with a vacuum dehidrator for example. They unit will turn on the water separation device when is requiered and will turn it off when the levels are the right ones again.