The customer initially considered installing a transmitter for each crusher to convey the 4-20mA signal to the distributed control system (DCS). Due to the high device cost of transmitters, the upgrade project would have been a huge financial burden for the customer.
The customer decided to purchase UE’s All-in-ONE switch+transmitter because it combined the functions of a transmitter, switch and gauge in one device. The customer did not require the high accuracy of a transmitter and was more than satisfied with the 0.5% accuracy delivered by the switch-transmitter.
UE’s All-in-ONE switch + transmitter was at least half the cost of a transmitter and the customer realized at least 50% savings from the upgrade project.
By using an integrated switch-transmitter-gauge device, the customer was able to realize several benefits:

• Predictive maintenance – With the 4-20mA signal, the customer was now able to trend the level of hydraulic pressure and arrest any problem before it reached abnormal conditions.
• Local relay for emergency shutdown – The built-in relay allowed the customer to shut down the crusher during emergency conditions. The relay also served as an additional switch for redundancy purposes.
• Increased monitoring accuracy – With the All-in-ONE device, up to 4 times better accuracy of monitoring conditions were achieved compared to a mechanical switch
• Reduction of leak paths – By replacing 3 devices (switch, gage, transmitter) with one device, there was significant reduction of potential leak points resulting in less system maintenance
• Streamlined inventory – Customer only needs one UE All-in-ONE device to perform functions of three devices. Instrumentation inventory can be reduced and standardized across the board.