Endress+Hauser Levelflex M FMP40 Guided Level Radar – FMP40-1KK3AMJB21AB

Product Overview

The Endress+Hauser Levelflex M FMP40 is a guided level radar instrument that uses Time Domain Reflectometry (TDR) to measure level continuously. The device transmits high frequency pulses along a probe inserted into the vessel, and measures the time of flight of the reflected pulse from the product surface, providing accurate level measurement. Interface measurement needs electronics version K, which this order code does not have.

The order code FMP40-1KK3AMJB21AB specifies an FMP40 configuration with ATEX approval (Ex ia, suitable for Zone 0/1 hazardous areas), a 16 mm rod probe in 316L stainless steel for liquid applications, and the standard 4-20 mA HART electronics. The FMP40 is rated SIL 2 in accordance with IEC 61508 and is suitable for a wide range of industrial level measurement tasks.

Key Features

• Guided level radar (TDR) measurement principle with high frequency pulses
• Continuous level measurement; this order code (rod probe, HART SIL electronics) is for liquids
• Measuring range up to 35 m with rope probes; the 16 mm rod of this order code is supplied up to 4 m
• HART 4-20 mA output, with PROFIBUS PA and FOUNDATION Fieldbus versions available
• SIL 2 rating per IEC 61508 / IEC 61511
• Rod, rope and coax probe options for different applications
• ATEX Ex ia approval for Zone 0/1 hazardous areas (per order code)

Technical Specifications

Applications

The FMP40 is used for level and interface measurement in storage tanks, process vessels, separators and silos across chemical, petrochemical, oil and gas, water and wastewater industries. It is well suited to liquids with foam, vapour, changing density and other conditions that affect other level technologies.

Ordering and Selection

When selecting the Levelflex M FMP40, confirm the probe type, length, process connection and output signal, because each instrument is configured by its order code for a specific tank or vessel. The order code FMP40-1KK3AMJB21AB, for example, identifies a unit with ATEX approval, rod probe and HART output. The order code can be decoded with the Endress+Hauser product structure to confirm the probe material and measuring range for your level application.

Maintenance and Support

The FMP40 requires minimal maintenance; the probe should be inspected for build-up during routine checks. Spare parts such as gaskets, housings and electronic inserts can be requested; the lead time is confirmed at quotation. Endress+Hauser lists the FMP40 as phased out.

The Levelflex M FMP40 guided radar transmitter measures the level of liquids and solids (interface only with electronics version K), and the probe version 1KK3AMJB21AB covers the rod probe configuration for the process connection.

The FMP40 electronics provide the on-site display and the HART output, and the guided wave measuring principle is independent of density and of dust and foam in the vapour space; a minimum dielectric constant of 1.6 applies to rod probes.

The Levelflex M FMP40 guided radar is used for the continuous level measurement of the liquids in the tanks and the vessels, and the device is configured with the standard Endress+Hauser tools for the quick commissioning.

The Endress+Hauser Levelflex M FMP40 derives the level from the time of flight of the pulse reflected along the guided probe; the rod probe of this order code is intended for liquids.

FMP40-1KK3AMJB21AB Order Code Decoded from the Levelflex M Product Structure

Each position of the order code FMP40-1KK3AMJB21AB maps to a feature in the product structure printed in Technical Information TI00358F. The leading 1 is the approval: ATEX II 1/2G Ex ia IIC T6 with IECEx Zone 0/1. The first K selects the probe type, a 16 mm rod intended mainly for liquids, and the second K states that the probe length is specified in millimetres for a 16 mm rod in 316L. The actual length is given separately on the order and nameplate.

The digit 3 identifies the O-ring material as EPDM, which sets the permitted temperature at the process connection to -40 to +120 °C. AMJ is the process connection: a 3 inch, 300 lbs raised-face flange to ANSI B16.5 in 316/316L. The letter B then defines the electronics as 2-wire, loop-powered 4-20 mA HART in the SIL version, and the digit 2 adds the four-line VU331 display with on-site envelope curve.

The final three positions are 1 for the compact basic version with the electronics mounted directly on the probe, A for the coated aluminium F12 housing with M20 cable gland and IP68 rating, and B for an EN 10204-3.1 inspection certificate covering the 316L wetted parts. Taken together, the code describes an intrinsically safe HART rod-probe transmitter on a 3 inch Class 300 flange for liquid service.

Levelflex M FMP40 Product Status and Probe Limits

Endress+Hauser states on endress.com that the Levelflex M FMP40 is phased out and refers users to the new generation, listing the Levelflex FMP50, FMP51, FMP56 and FMP57. For liquid applications the listed successors are the Levelflex FMP50 and FMP51. Anyone replacing an installed FMP40 should compare probe type, process connection and approval position by position rather than assuming a one-to-one code transfer.

Probe choice determines the measuring range of the FMP40. The 35 m maximum applies only to rope probes; a 16 mm rod can be supplied from 0.3 m to 4 m, a 6 mm rod up to 2 m and a coax probe up to 4 m. Rod and rope probes need a dielectric constant of at least 1.6 and have a preset upper blocking distance of 0.2 m. Accuracy is ±3 mm up to 10 m, and all versions are rated for -1 to 40 bar.

Why Seven Star LLC?

Seven Star LLC supplies Endress+Hauser level instruments and spare parts on request to customers in Oman and the GCC. Order codes, probe types and approvals are confirmed at quotation.

The exact model and revision are checked against the nameplate data before quotation.

Request a Quote for Endress+Hauser Levelflex M FMP40 Guided Level Radar – FMP40-1KK3AMJB21AB

For the Levelflex M FMP40 or any related control and instrumentation requirement, contact the Seven Star LLC team. Submit a formal inquiry through our RFQ page with your configuration and application details, and we will respond with a quotation and the manufacturer documentation.

Installing the Levelflex FMP40 Correctly

Guided radar is forgiving of foam, vapour and density changes, but it is sensitive to what the probe can “see” along its length. A few mechanical points decide whether commissioning takes minutes or days:

• Clearance from internals: keep the rod away from vessel walls, agitator blades, heating coils, ladders and fill streams. Anything close to the probe produces a false echo.
• Nozzle geometry: a tall, narrow nozzle can generate a reflection near the top of the range. Keep nozzles short and wide enough for the probe, or use a stilling well or bypass chamber where the vessel design allows.
• Probe length: order the rod long enough to reach the lowest level that must be measured, allowing for the inactive zones at the top and tip of the probe. A 16 mm rod can be shortened on site if the tank drawing changes, but not lengthened.
• Grounding: on non-metallic tanks the probe needs a metallic reference surface at the process connection to form a clean signal path.

Commissioning Steps

Basic setup is done from the local display or over HART. Enter the tank type, the medium properties and the empty (E) and full (F) distances measured from the flange reference point. With the tank at a known, low level, run the interference echo mapping so the transmitter records fixed reflections from nozzles and internals and suppresses them in normal operation. Confirm the reading against a dip or sight glass at two levels before handing the loop over, and record the envelope curve as a reference for future diagnostics.

Troubleshooting Common Issues

• Level jumps to a fixed value: usually an unsuppressed interference echo. Repeat the mapping at a lower level.
• Loss of echo at low level: check the medium dielectric constant setting and the probe end settings; low-dielectric liquids such as light hydrocarbons return a weaker signal.
• Error after cleaning: heavy build-up or a bent rod changes the signal. Inspect the probe and compare the new envelope curve with the commissioning record.
• Current fixed at alarm: read the diagnostic code over HART before replacing parts; many faults are configuration related.

Typical Duties in Oman and the GCC

FMP40 instruments are common on produced-water and crude storage tanks, on separator and slug catcher level and oil–water interface, on chemical injection skids and on condensate and LPG vessels in petrochemical plants. In desalination and water utilities they are used on chemical dosing and sludge tanks where foam defeats ultrasonic devices. The Ex ia approval in this order code allows installation directly in Zone 0/1 tank tops when wired through a suitable barrier.

Ordering Through Seven Star LLC

For replacement units, send us the full order code from the nameplate together with the probe length. We can supply Endress+Hauser equipment on request with manufacturer documentation and can check whether a legacy FMP40 code should be matched like-for-like or moved to a current Levelflex equivalent.

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See also: Endress+Hauser Prosonic S FMU90 Ultrasonic Level and Flow Transmitter.