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Brand: Rosemount
Rosemount 3490 Controller for Level, Pump and Flow
Description
Rosemount 3490 Controller: field controller for level, pumps and open channel flow
The Rosemount 3490 Controller is a field-mounted controller that reads one or two 4-20 mA or HART transmitters and turns the signals into control actions, totalised values and logged data. It was developed for water and wastewater work and is designed to accompany the Rosemount 1208 level and flow transmitters, but it accepts any 4-20 mA or HART device, so it is also used for general tank and sump duties.
Seven Star LLC supplies the Rosemount 3490 Controller in Oman and the GCC as an independent supplier in Muscat. Two input and output variants exist, so the model code decides what you actually receive.
Rosemount 3490 model code and the A and C variants
The datasheet example code is 3490 C S M P KL 00 0 0 01 MP WP. The main choice is the Inputs and outputs letter.
| Feature | Code A | Code C |
|---|---|---|
| Sensor inputs (4-20 mA / HART) | 1 | 2 |
| Digital inputs | 2 | 4 |
| Analog outputs (4-20 mA) | 1 | 3 |
| Relay outputs | 3 | 6 |
| Ethernet | 1 | 1 |
| Level and pump control | Yes | Yes |
| Open channel flow | Yes | Yes |
| Differential level | No | Yes |
| Tank volume | Yes | Yes |
The remaining fields are application S (standard), host communication M (Modbus TCP), housing P (engineered polymer), hazardous location NA or KL (ATEX, IECEx, US and Canada intrinsically safe sensor inputs), and cable connection codes 01, 02 or 03. The additional options are MP for the wall and pipe installation kit and WP for the weather protection cover.
Rosemount 3490 technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Rosemount (Emerson) / 3490 Controller |
| Inputs | Up to two 4-20 mA / HART inputs isolated from ground, loop-powered or self-powered; accuracy ±0.02 mA, 12 bit |
| Supported HART devices | Rosemount 1208C, 3408, 5408, 5300, 3300, 3100; other HART 5/7 level transmitters generically |
| Outputs | Up to three 4-20 mA outputs and up to six relays (250 Vac 8 A / 24 Vdc 8 A resistive) |
| Digital inputs | Up to four, for potential-free contacts |
| Display | 4.3 in. 480 x 272 backlit colour TFT, six-button keypad, status LED |
| Software update rate | 10 Hz |
| Host connection | Modbus TCP, 10/100 Mbps RJ45, also web interface for service and log download |
| Data logging | Up to 200,000 data points on built-in memory card |
| Power supply | 24-48 Vdc or 100-240 Vac 50/60 Hz, maximum 12 W, fuse 2 A 350 V |
| Enclosure | Polycarbonate copolymer, IP66/IP67 and Type 4X, withstands 7 J impact |
| Ambient temperature | -40 to +60 °C; display reading -20 to +60 °C |
| Weight | 1.7 kg (3.7 lb) |
| Start-up time | About 40 seconds |
How the Rosemount 3490 wizards and calculations work
Four application wizards guide the set-up: level and pump control, open channel flow, differential level and tank volume. Each wizard asks only for the data that application needs, such as pump start and stop levels, the flume or weir type for a flow calculation, the two levels for a screen differential, or the tank geometry for volume. Any measured value can then be totalised, differenced, summed, averaged and logged.
In pump control the relays start and stop pumps or raise alarms from level, with the aim of preventing dry running and overflow. For analog outputs the controller drives the signal off scale on a fault, using either the Rosemount standard levels (21.75 mA high, 3.75 mA low) or NAMUR NE43 (22.5 mA high, 3.6 mA low). Output units cover level, volume and a wide list of flow rates from litres per second to mega gallons per day.
Where the Rosemount 3490 fits with other Rosemount parts
The usual pairing is the Rosemount 1208C level and flow transmitter, but radar transmitters such as the 3408 and 5408 or the older 5300 and 3300 can also feed it. It uses the same 4.3 in. display and similar input and output specifications as the Rosemount 2405 Monitoring Hub, which is the better choice when up to eight HART devices must be collected for tank inventory. For tank farm networks with many gauges, the Rosemount 2460 System Hub fills that role instead.
If you are replacing an older 3490 Series unit, send the nameplate details, because earlier 3490 designs used a different data sheet and may differ in inputs and wiring.
Selection checklist for the Rosemount 3490
- Count the sensors and relays needed. Code A has one input and three relays; code C has two inputs and six relays.
- Differential level, for example across a screen, is available only on code C.
- Check that the transmitter signal is 4-20 mA or HART 5/7 and whether it is loop-powered by the controller.
- Select the intrinsically safe sensor input option (KL) if a transmitter sits in a hazardous area.
- Choose the wall and pipe kit and the weather cover for outdoor installation.
- Note the Modbus TCP register needs of the host system or SCADA.
Installation, commissioning and maintenance of the Rosemount 3490
The polymer enclosure mounts to a wall or pipe through a 316L stainless support kit, and seven M20 entries take cable glands or NPT adapters. Terminals are spring loaded. Plan the transmitter loop with the load table: 2200 Ω maximum at 3.75 mA falling to 66 Ω at 22.5 mA, with at least 12 Vdc left at the transmitter. The sensor inputs are isolated at 1.75 kV from the other terminals, and the unit includes surge protection to IEC 61000-4-5 and burst protection to IEC 61000-4-4.
After the start-up period, run the wizard, test each relay with the pump circuit locked out, and check the analog output scaling against the PLC. Download the log through the web interface to confirm that recording works. Each new unit has a QR asset tag for retrieving device documents. Seven Star LLC can quote spare units so that a failed controller can be swapped quickly.
Typical applications of the Rosemount 3490 in Oman and the GCC
The controller suits intake and transfer pump stations, sewage lift stations, stormwater sumps, desalination plant chemical tanks, screen channels and open channels in municipal and industrial water systems. Its IP66/IP67 enclosure, wide temperature range and weather cover help in hot, dusty and humid sites, and the colour display stays legible in strong sunlight when shaded by the cover. Because it also accepts generic 4-20 mA signals, it is used as a local pump and alarm controller on industrial sumps and day tanks.
Information to send with an RFQ for the Rosemount 3490
- Model code or nameplate photo, including A or C variant
- Transmitter models and signal type
- Number of pumps and alarms to control
- Hazardous area requirement
- Host system and Modbus TCP needs
- Mounting accessories, cable glands, quantity and delivery location
Documents and quotation
A manufacturer datasheet for the Rosemount 3490 Controller is attached on this page, so you can check the model code, ratings and dimensions against your project documents before ordering.
To receive a quotation, send us the part number or the full model code from your nameplate, the quantity, and the delivery location. Seven Star LLC is an independent supplier in Muscat and replies with availability and lead time, and we confirm the details with you before anything is ordered.
Other Models in the Rosemount Tank Gauging Range
Seven Star LLC supplies models from the Rosemount Tank Gauging range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| Rosemount 2405 Monitoring Hub for Tank Inventory | Level Instrumentation | View details |
| Rosemount 3490 Controller for Level, Pump and Flow | Level Instrumentation | You are viewing this model |
Datasheets & Documents
- Datasheet Rosemount 3490 Controller Datasheet Download
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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 3490 Controller for Level, Pump and Flow
Answers from our engineering team on installation, compatibility and integration.
01What is the difference between Rosemount 3490 code A and code C?
Code A has one sensor input, two digital inputs, one analog output and three relays. Code C has two sensor inputs, four digital inputs, three analog outputs and six relays, and adds differential level.
02Which transmitters work with the Rosemount 3490?
Rosemount 1208C, 3408, 5408, 5300, 3300 and 3100 level transmitters are listed, plus other 4-20 mA transmitters and HART 5/7 level transmitters.
03Which applications does the Rosemount 3490 support?
Wizards cover level and pump control, open channel flow, differential level and tank volume. All values can be totalised, differenced, logged, summed and averaged.
04How does the Rosemount 3490 connect to a host?
Through an Ethernet RJ45 port at 10/100 Mbps for Modbus TCP, and the same port gives access to the web interface for service and log download.
05What are the environmental limits of the Rosemount 3490?
The enclosure is IP66/IP67 and Type 4X, rated for -40 to +60 °C ambient and 0 to 100% relative humidity. Display readings are valid from -20 to +60 °C.
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