| There are various applications, which determine transducer selection. The main factors to consider are as follows: • What type of industrial monitoring system is the device connecting to? The industry standard is an acceleration output utilising a constant current 2 or 3 wire arrangement. A velocity output may be more suitable if vibration displacement is to be monitored, a single stage of integration in the monitoring hardware can reduce the sensitivity to low frequency noise. Alternatively a direct 4-20mA set up could be required to provide a direct interface to PLC/DCS systems. A self-generating (no power feeder) velocity or acceleration vibration transducer offers the advantages of simple connectivity at the expense of sensitivity and reduced cable run. • The instrument frequency range must be selected for the application, usually determined from the machine rotational speed and the type of monitoring required. Velocity output transducers tend to have a more restricted band of operation; Sensonics PZS range of accelerometers offer very broadband acceleration performance suitable for most applications. • The range and sensitivity are dependant on the type of measurement required, a high sensitivity device may be suitable for small range measurements, particularly in noisy environments, where pick-up on the cable runs can be a problem. Care should be taken in selecting the velocity range for direct 4-20 mA output devices, as these are factory set. • Environmental factors include working temperature range. IP rating - is a waterproof system required? Is the device to be used within a potentially explosive atmosphere? If so. ensure the ATEX rating specified for the device meets with the application. • The most economical mounting arrangement is a transducer with a single point stud mounting on to the machine — the space available may restrict the size of the transducer. More robust options should be selected where physical interference is likely, choose from 3 or 4 hole mounting, side entry options, armoured cable or flexible conduit. • If you have any questions or wish to discuss your application in more detail. Sensonics experienced sales and engineering team is on hand to help. Please feel free to get in touch. Quick Product Selection Guide |