Rosemount 4051S pressure transmitter

Emerson has announced the Rosemount 4051S pressure transmitter, which can provide local real-time control, eliminating the need for a separate device such as a programmable logic controller. This functionality is provided by two relay switches, each of which can be configured to provide on/off control of pumps, motors, and other equipment. These switches can also provide alerts based on pressure, flow, totalised flow, level, volume or module temperature.

Emerson says the Rosemount 4051S offers a 20-year stability specification, and a fast response time of 40 ms allows the 4051S to be used in demanding applications. An 800:1 turndown ratio reduces the number of unique models needed to be kept in stock, streamlining inventory.

Advanced diagnostics provide more insights, with loop integrity continuously monitoring the health of the entire electrical loop to detect potential failures. Plugged impulse line detection alerts plant personnel so they can take action, and the transmitter can also diagnose other abnormal conditions, such as cavitation, using its built-in process intelligence. Built-in calibration and diagnostic logs provide the information needed to optimize maintenance and perform root cause analysis.

The graphical, backlit display is larger than previous models, making it easier to read and allowing inclusion of more descriptive warning messages, an always-on process variable value, and a customisable secondary area.

Bluetooth connectivity from up to 15 m away improves safety by allowing plant personnel to access the transmitter so they can avoid entering hazardous areas.