ifm LR2750 Guided Wave Radar Level Sensor, G 1 Aseptoflex

ifm LR2750 Guided Wave Radar Level Sensor, G 1 Aseptoflex

The ifm LR2750 is a continuous level sensor based on guided wave radar, supplied as a modular system of an evaluation unit and a probe. The probe length is selectable between 150 and 2000 mm and can be shortened on site to suit the container height. The process connection is a G 1 external thread of the Aseptoflex Vario type, and the process temperature range is -40 to 150 degrees Celsius.

Outputs are a scalable 4 to 20 mA analogue signal, a switching output and IO-Link, and the four-digit LED display reads the level locally. Measuring error is ±7 mm. Seven Star LLC supplies the LR2750 in Oman and the GCC as an independent supplier; quote LR2750 with the probe length needed.

LR2750 technical specifications

The table lists the values published by the manufacturer for the LR2750. Where a parameter has several operating modes, the headline value is shown; the full parameter list is in the manufacturer documentation.

How the LR2750 works

The LR2750 is a guided wave radar level sensor. A short electromagnetic pulse travels down the probe rod, and when it meets the liquid surface a part of the pulse is reflected. The electronics time the echo and convert it to the distance to the surface, which becomes a level value on the 4 to 20 mA output, a switching output or IO-Link. Because the measurement is based on travel time, it does not depend on the density of the liquid, as long as the dielectric constant of the liquid stays above the stated limit.

Where the LR2750 fits and related parts

The LR2750 is the high-end continuous level device in this group, ahead of the LK1022 capacitive probe. It is selected when the liquid is water-based with a dielectric constant above 5, the temperature is high, or hygienic cleaning is needed. For simple switch points the LMT100 or LMC510 are more economical.

Selection and ordering checklist for the LR2750

Work through the points below before you confirm the order, so that the LR2750 you receive is the one your machine or plant needs.

• Probe length: 150 to 2000 mm and the container height
• Dielectric constant of the medium must exceed 5; water and hydrous media are recommended
• Process temperature at the connection and the vacuum rating of -1 bar
• Process connection: G 1 Aseptoflex Vario, check the hygienic adapter
• Output: 4 to 20 mA, switching or IO-Link

The manufacturer lists this article under the type designation Continuous level sensor (guided wave radar), LR0000B-EA01AKSKG/US. The article number LR2750 is the reference to quote when ordering, and the type designation is useful for technicians who compare the label on an installed unit.

Installation, commissioning and maintenance

Fit the probe through the process connection so that it hangs freely without touching the vessel wall or internal pipework, and keep it away from agitators and filling streams. Note the inactive zones at the top and bottom of the probe when you determine the usable range. During commissioning scale the analogue output to the empty and full positions and compare against a manual dip or sight glass. For hygienic processes follow the cleaning cycle for the connection used, and watch the process temperature at the connection, because the notes in the specification limit the temperature at the housing.

Account for the inactive zones of 30 mm at the top and 10 mm at the bottom, so the usable range is shorter than the probe. Keep the probe clear of walls and internals and away from the filling stream. For high temperatures, the temperature at the process connection is the decisive value, according to the manufacturer notes. On commissioning, scale the 4 to 20 mA to the real empty and full distances.

Typical applications in Oman and the GCC

Water and process liquids in storage and buffer tanks, cooling water, desalination chemicals, and clean-in-place systems are typical. In Oman and the GCC it is used where a continuous signal is wanted but the tank is closed or the foam makes optical methods difficult.

Level sensors in tanks exposed to Gulf summers must tolerate hot product, condensation on cold nozzles and long periods without attention. Plan a periodic proof test of the alarm point, and record the output state at known levels during commissioning.

LR2750 compared with related ifm types

The table places the LR2750 next to neighbouring types in the same application group, so you can see whether a sibling would suit the job better.

Information to send with an RFQ for the LR2750

To prepare an accurate offer for the LR2750, please include the following with your enquiry:

• Liquid, dielectric constant and process temperature
• Required probe length and tank height
• Process connection and hygienic requirements
• Analogue, switching or IO-Link output
• Quantity and delivery location

Documents and quotation

No datasheet is attached to this page. Send us the part number LR2750 and we will confirm which documents are available, such as the datasheet and operating instructions, and for IO-Link devices the device description file.

Seven Star LLC is an independent supplier in Muscat serving Oman and the GCC and is not affiliated with the manufacturer; the name ifm is used only to identify the product. Prices are not shown on the page, so send the part number, the quantity and the delivery location to receive a quotation.