Rosemount

Rosemount is Emerson’s brand for pressure, temperature, level and flow measurement, best known for the 3051 pressure transmitter. Frank Werner, Robert Keppel and Vernon Heath founded it in Minnesota in 1956 as Rosemount Engineering Company, first making temperature sensors for aerospace. It moved into the process industries, took the name Rosemount Inc. in 1966, and has been part of Emerson since 1976.

Seven Star LLC is an independent supplier in Muscat. We list Rosemount transmitters, level instruments, flowmeters and analytical sensors, and supply them and their spares to oil and gas, power, water and process plants in Oman and the GCC by model code.

Rosemount company profile

Established1956, Minnesota, USA, as Rosemount Engineering Company
FoundersFrank D. Werner, Robert E. Keppel and Vernon H. Heath
OwnershipAcquired by Emerson in 1976; now an Emerson brand
Product familiesPressure, DP flow and level transmitters, temperature sensors and transmitters, radar and guided wave radar level, vibrating fork switches, tank gauging, magnetic, vortex and ultrasonic flowmeters, liquid analysis sensors and wireless instruments

Milestones

1956: Robert Keppel, Vernon Heath and Frank Werner incorporate Rosemount Engineering Company in Minnesota; early work is aerospace sensors.

1969: The Rosemount 1151 analog pressure transmitter is introduced.

1976: Emerson acquires Rosemount.

1989: The Rosemount 3051 pressure transmitter, built on digital technology, is launched.

2001: The 3051S generation follows.

Rosemount products we list

FamilyModelsTypical use

Pressure transmitters3051, 3051C coplanar, 3051T in-line, 3051S, 3051S series, 3051SMV multivariable, 2051, 2088, 1199 diaphragm sealsPressure, differential pressure and remote seal measurement
DP flow and DP level3051CF flowmeter, 3051L, 3051SALFlow through primary elements, and level in pressurised vessels
Temperature644, 248, 3144P, 848T, 648 wireless, 214C RTD sensor, 2240S multi-inputProcess temperature, high-density multipoint and tank temperature
Radar and level5408, 5400, 5300 GWR, 3300 GWR, 3308A wireless, 5900S, 5900C tank gaugesLevel in tanks, separators and custody transfer tank gauging
Level switches2120, 2140, 2160 wireless, 702 discrete transmitterHigh and low level alarms, overfill protection and pump protection
Flowmeters8700 magnetic, 8800D vortex, SeniorSonic 3414, 3415/3416, 3417, JuniorSonic 3411/3412, 3814 liquidWater, steam and gas flow, and fiscal gas and liquid metering
Liquid analysis396P TUpH, 396PVP, 499ACL chlorine sensorpH, ORP and free chlorine in water and process streams

Many Rosemount transmitters share one platform, so the model code tells you what you have. On a 3051, the letter after the number sets the type: C for coplanar (differential or gauge), T for in-line, L for liquid level and CF for a complete flowmeter. The next characters set the measurement type, the range code, the output (4-20 mA HART, FOUNDATION Fieldbus or WirelessHART) and the wetted materials. A transmitter with the wrong range code may work, but with poor accuracy at the point that matters.

Where Rosemount instruments are used
In Oman and the GCC, Rosemount instruments are used across upstream oil and gas, gas plants and LNG, refineries, tank farms and terminals, power and desalination stations, and water networks. Ultrasonic gas meters and tank gauges are used for fiscal and custody transfer measurement.

Ordering Rosemount instruments: what we need
Send the full model code from the nameplate (for example 3051CD2A22A1AM5B4) and the tag if it is a replacement. For a new instrument, send the measuring range, process connection, wetted materials, output protocol and hazardous area approval.

Facts checked against Emerson’s Rosemount history and published company histories, October 2026.

Browse Rosemount products by category: Pressure Instrumentation, Temperature Instrumentation, Level Transmitter, Liquid Analysis Sensors, Flowmeters.