Brand: Rosemount

Rosemount 2140 Level Detector – Vibrating Fork

Name: Rosemount 2140 Vibrating Fork Level Detector – Manual
Brand: Rosemount

Description

Overview

The Rosemount 2140 Level Detector is the world’s first wired HART vibrating fork level detector, purpose-built for applications including overfill prevention, high and low level alarms, and pump protection. Providing reliable level detection of all liquids as well as sediments, the 2140 offers greater ease-of-use and flexibility with smart diagnostics that continuously monitor electronic and mechanical device health, plus a fully integrated remote proof-testing capability that increases both safety and efficiency for plant and workers.

With fast quotation turnaround and technical support, Seven Star LLC proudly offers the Rosemount 2140 to tank farms, storage terminals, and process facilities across the Sultanate of Oman, Muscat, and the wider GCC. The Rosemount 2140:SIS variant is certified to IEC 61508 (SIL 2) for safety-critical applications, making it a strong choice for overfill prevention programs subject to strict regulatory compliance.

Measurement Principle

The Rosemount 2140 uses the principle of a tuning fork: a piezo-electric crystal oscillates the forks at their natural frequency, and changes to this oscillation frequency are continuously monitored by the electronics as they vary depending on the liquid medium in which the forks are immersed. The denser the liquid, the lower the oscillation frequency, giving the device a reliable physical basis for detecting media presence.

Whenever liquid in a vessel or pipe drains down past the forks, a distinct frequency change is detected and a dry condition is indicated; when liquid rises and contacts the forks, the reverse frequency change indicates a wet condition. These wet and dry conditions can be transmitted digitally as a HART signal or as a discrete output via the analog signal, and detection remains virtually unaffected by turbulence, foam, vibration, solids content, coating products, and liquid properties.

Engineering Design of the Rosemount 2140

The Rosemount 2140 utilizes the wired HART protocol, allowing easy integration into automated systems without additional wiring, and can switch between HART 5 and HART 7 to meet varying system requirements. Extended fork lengths up to 157.5 inches (4,000mm) accommodate large vessels, and an adjustable detection output delay prevents false detection in turbulent or splashing applications.

The device continuously performs electronic self-checking and condition monitoring, with an optional smart diagnostics suite offering frequency profiling, power advisory, and configurable process alerts. The Rosemount 2140:SIS additionally supports remote partial proof-testing, allowing plant staff to verify device functionality from the control room and minimize tank climbs—improving operator safety while reducing testing-related downtime that would otherwise require a physical climb and manual wet/dry verification at height.

Key Features

The Rosemount 2140 combines vibrating fork reliability with smart HART diagnostics. Core capabilities include:

World’s first wired HART vibrating fork level detector.
SIL 2 certification to IEC 61508 available on the 2140:SIS variant.
Remote proof-testing capability, minimizing tank climbs and improving operator safety.
Detection unaffected by turbulence, foam, vibration, solids content, and coating products.
Extended fork lengths up to 157.5 inches (4,000mm) for large vessel applications.
Smart diagnostics suite: frequency profiling, power advisory, configurable process alerts.
Sand Switch function for sand and sediment detection in separator vessels.
Switchable HART 5/HART 7 protocol support for flexible system integration.

Industrial Applications

The Rosemount 2140 is well suited to tank farms, storage terminals, separator vessels, and pump protection applications across Oman’s oil and gas and industrial sectors. Its Sand Switch function makes it particularly valuable for managing tank and separator efficiency where sediment accumulation is a routine operational concern and undetected buildup can silently reduce usable tank capacity over time.

With engineering support in Muscat, Seven Star LLC supports storage terminals, refineries, and industrial facilities throughout the Sohar and Salalah economic zones and the broader GCC region with the Rosemount 2140’s reliable overfill prevention and level alarm capability.

Technical Specifications

Full technical parameters for the Rosemount 2140 vibrating fork level detector:

Parameter	Specification
Model	Rosemount 2140 / 2140:SIS
Measurement Principle	Vibrating Fork (Tuning Fork Frequency Detection)
Communication	Wired HART (Switchable HART 5/HART 7)
Safety Certification	IEC 61508 SIL 2 (2140:SIS)
Fork Length	Up to 157.5 in. (4,000mm)
Temperature Range	-70°C to 260°C (Model Dependent)
Diagnostics	Frequency Profiling, Power Advisory, Configurable Process Alerts
Proof-Testing	Remote Partial Proof-Test (2140:SIS)
Special Function	Sand Switch (Sediment/Separator Detection)

Why Choose Seven Star LLC for Overfill-Prevention Level Detection

An overfill-prevention program lives or dies on whether the level switch specified actually matches the regulatory and insurance requirements for the tank in question – the standard 2140 and the SIL 2-certified 2140:SIS variant are not interchangeable once a facility’s safety case has been written around one or the other. Seven Star LLC’s engineers confirm which variant, fork length, and proof-test interval a customer’s overfill-prevention documentation actually calls for before an order is placed, and help assemble the SIL certificate package alongside the transmitter for facilities preparing an IEC 61511 safety file. Because tank farms and storage terminals across Oman often operate multiple vessels on a shared maintenance schedule, we also help plan bulk spares purchasing across a terminal’s full fork-detector population, and coordinate delivery timing around planned tank inspection windows in Muscat, Sohar, and Salalah.

Request a Quote for Rosemount 2140 Level Detector – Vibrating Fork

To submit a formal Request for Quote (RFQ), check current availability and lead time, or arrange technical consultation for the Rosemount 2140 Level Detector, please contact Seven Star LLC today. Backed by manufacturer datasheet documentation, our engineers are ready to assist with rapid sourcing for your overfill prevention and level alarm projects.

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About brand

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

Established	1956, Minnesota, USA, as Rosemount Engineering Company
Founders	Frank D. Werner, Robert E. Keppel and Vernon H. Heath
Ownership	Acquired by Emerson in 1976; now an Emerson brand
Product families	Pressure, 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

Family	Models	Typical use
Pressure transmitters	3051, 3051C coplanar, 3051T in-line, 3051S, 3051S series, 3051SMV multivariable, 2051, 2088, 1199 diaphragm seals	Pressure, differential pressure and remote seal measurement
DP flow and DP level	3051CF flowmeter, 3051L, 3051SAL	Flow through primary elements, and level in pressurised vessels
Temperature	644, 248, 3144P, 848T, 648 wireless, 214C RTD sensor, 2240S multi-input	Process temperature, high-density multipoint and tank temperature
Radar and level	5408, 5400, 5300 GWR, 3300 GWR, 3308A wireless, 5900S, 5900C tank gauges	Level in tanks, separators and custody transfer tank gauging
Level switches	2120, 2140, 2160 wireless, 702 discrete transmitter	High and low level alarms, overfill protection and pump protection
Flowmeters	8700 magnetic, 8800D vortex, SeniorSonic 3414, 3415/3416, 3417, JuniorSonic 3411/3412, 3814 liquid	Water, steam and gas flow, and fiscal gas and liquid metering
Liquid analysis	396P TUpH, 396PVP, 499ACL chlorine sensor	pH, 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.

FAQ

Questions about the Rosemount 2140 Level Detector

Answers from our engineering team on installation, compatibility and integration.

01How does remote proof-testing on the Rosemount 2140:SIS work?

Remote partial proof-testing allows plant staff to verify device functionality from the control room, minimizing tank climbs and improving operator safety while reducing testing-related downtime.

02Is the Rosemount 2140 affected by foam, turbulence, or coating?

No. Detection is virtually unaffected by turbulence, foam, vibration, solids content, coating products, and liquid properties.

03What is the Sand Switch function used for?

The Sand Switch function provides wet sand settings for managing sand and sediment detection in separator vessels, helping operators maintain tank and separator efficiency.

04Is the Rosemount 2140 suitable for safety instrumented systems?

Yes. The Rosemount 2140:SIS variant is certified to IEC 61508 (SIL 2) for safety-critical overfill prevention and level alarm applications.

05Is Seven Star LLC a trusted supplier for Emerson products?

Yes. Seven Star LLC is an experienced supplier of Emerson Rosemount instrumentation in Oman and the GCC, providing genuine products with full support.