Inquiry (采购产品): Model 638 I'd like to know what units I should be displaying on a HMI when referring to the 4-20mA signal from the vibration sensor. **** Hidden Message ***** Drew Ridgley 5100 Casteel Dr Coraopolis, PA 15108 USA Company: Swindell Dressler Title: Electrical Engineer Phone: 412-788-7100 Fax: 412-788-7110 E-mail: dridgley@swindelldressler.com **** Hidden Message ***** dridgley@swindelldressler.com