LR0000B-BR34AMPKG/US ifm LR3000 Continuous Liquid Level Transmitter

IFM LR3000 Guided Wave Radar Level Sensor — Technical Overview

The LR0000B-BR34AMPKG/US, listed in the supplied documentation under the LR3000 product designation, is an ifm continuous level sensor based on guided wave radar technology. It measures liquid level and provides one configurable switching output plus one analog output, with IO-Link communication available through OUT1.

With a G 3/4 external process thread, a selectable probe length from 100 to 1600 mm, and configurable analog scaling, this sensor suits liquid-level monitoring in compatible industrial tanks and process vessels. Engineers should evaluate the liquid's dielectric constant, probe geometry, inactive zones, process connection temperature, and output requirements before installation.

01 | Measurement Principle and Application Fit

Guided wave radar determines level using a signal transmitted along a probe. The reflected signal supports continuous level measurement when the liquid and installation meet the sensor's operating requirements. Media properties and probe configuration directly affect whether the sensor can measure reliably.

• Recommended media: Water, water-based liquids, oils, and oil-based media within the specified application limits.
• Minimum dielectric constant: 1.8.
• Low-dielectric liquids: For media with a dielectric constant between 1.8 and 5, such as certain oils, a coaxial pipe is required for operation according to the supplied specifications.
• Measurement method: Guided wave radar.
• Sampling rate: 4 Hz.
• Probe length: 100–1600 mm.

Do not select the sensor based on tank height alone. Confirm the required measuring span, the usable probe length, the inactive zones, and the liquid's dielectric properties. Consult the operating instructions for media and installation restrictions not reproduced in this product summary.

02 | Probe Geometry, Measuring Range, and Setpoints

Engineering selection note: The active range is shorter than the physical probe length. Oil and oil-based media also have different active and inactive range values. Calculate the usable measurement span using the correct media setting rather than assuming that the entire probe length is measurable.

03 | Output Architecture and Control-System Integration

The sensor provides two outputs with different roles. OUT1 supports switching operation or IO-Link, while OUT2 provides the analog measurement signal. Confirm the selected electrical mode and scaling before connecting the device to a PLC, remote I/O station, or process controller.

The current and voltage output modes have different electrical requirements. Verify the configured output mode before connecting the sensor to a controller. Do not assume that a single analog terminal configuration simultaneously provides both signal types.

04 | IO-Link Communication and Parameter Access

For IO-Link integration, confirm that the master supports the required communication mode and port type. Check the device identification and process-data mapping during commissioning. The supplied specifications list the communication interface and process-data structure but do not provide a complete list of internal diagnostic events or parameter indexes.

05 | Accuracy, Resolution, and Signal Scaling

Resolution describes the smallest reported increment, not the overall measurement accuracy. When setting PLC scaling, map the configured lower and upper measurement limits to the selected analog output endpoints. The supplied temperature-drift figure does not specify its output unit, so verify the original technical documentation before using it in an error budget.

06 | Process Limits, Materials, and Electrical Requirements

High-temperature installation note: The supplied documentation states that the temperature at the process connection determines the permitted operating condition. The actual medium temperature may be higher, so evaluate the connection temperature and follow the technical note for high-temperature service.

07 | Mechanical Construction and Environmental Qualification

• Weight: 378.4 g.
• Wetted materials listed: Stainless steel 1.4305 / 303, probe connection stainless steel 1.4435 / 316L, PTFE, and FKM.
• Other listed materials: Stainless steel 1.4301 / 304, stainless steel 1.4404 / 316L, FKM, PBT, PC, PEI, and TPE-V.
• Seal: NBR reinforced fibre.
• Connector: One M12 connector, A-coded, with gold-plated contacts.
• Shock resistance: DIN EN 60068-2-27; 50 g for 11 ms, or 25 g for 6 ms with a 0.5 m reference rod.
• Vibration resistance: DIN EN 60068-2-6; 5 g from 10–2000 Hz, or 1 g from 5–200 Hz with a 0.5 m reference rod.
• EMC: DIN EN 61000-6-2 and the applicable DIN EN 61000-6-3 or DIN EN 61000-6-4 conditions stated for closed metal, plastic, or open metal tanks.
• MTTF: 196 years, as specified in the supplied documentation.
• UL approval: Approval No. H006; File No. UL E174191.

Verify material compatibility with the actual liquid, cleaning agents, and operating conditions. The presence of a material in the specification does not establish compatibility with every chemical or process fluid.

08 | Display, Wiring, and Commissioning Checks

The sensor uses a four-digit alphanumeric display for level indication and parameter setting. Three green LEDs and one yellow switching-status LED provide local visual indication. Use the display and status indicators as initial checks, then confirm the measured signal at the receiving controller.

• Confirm the full type designation and the installed probe length before mounting.
• Check that the G 3/4 process connection matches the vessel fitting and sealing arrangement.
• Verify the liquid type and select the correct media setting, especially for oils and oil-based liquids.
• Set the switching point and reset point within the allowed ranges for the selected media setting.
• Confirm the selected OUT1 function: switching or IO-Link.
• Configure OUT2 for the required current or voltage mode and scale the endpoints to the intended measuring range.
• Verify the 18–30 V DC supply, PNP input compatibility, and M12 connector wiring against the official wiring diagram.
• After power-up, allow for the specified power-on delay of less than 3 seconds, then check the display, switching state, and controller reading.

The supplied connector notes identify core colours as BN (brown), BU (blue), BK (black), and WH (white), following DIN EN 60947-5-2. Confirm each pin assignment against the official wiring diagram for the exact type before making connections.

09 | Field Diagnostics: Symptoms and Checks

These are practical fault-isolation steps based on the supplied specifications, not a claim that the device provides a specific built-in alarm for every condition. Use the official operating instructions to identify any additional diagnostic messages and parameter-specific behavior.

10 | Global PLC Spare HUB's Insight

For the LR3000 guided wave radar application, reliable selection starts with the liquid rather than the mounting thread. A probe that fits the vessel can still be unsuitable if the medium's dielectric properties, inactive zones, or required measuring span fall outside the supported configuration.

For oil service, engineers should pay particular attention to the stated coaxial-pipe requirement for media with a dielectric constant between 1.8 and 5, and to the reduced active range specified for oil-based media. Confirm these details before finalising the mechanical installation.

For PLC integration, treat OUT1 and OUT2 as separate configuration decisions. OUT1 supports switching or IO-Link, while OUT2 provides the analog level signal. Matching the output mode, PLC input type, and scaling endpoints during commissioning helps prevent false level readings and unnecessary sensor replacement.

11 | Warranty, Shipping, and Quotation

• Warranty: 12-month warranty, subject to the seller's written warranty terms and applicable conditions.
• Shipping methods: FedEx, UPS, and DHL, subject to destination, availability, and shipping arrangements.
• Before ordering: Confirm the exact type designation, probe length, process connection, required output mode, and compatibility with the intended liquid.
• Quotation support: Contact Global PLC Spare HUB to request pricing, availability, lead time, and shipping options.
• Pack quantity: 1 piece, according to the supplied product data.

12 | Frequently Asked Questions

Q1: How should I choose the probe length for a tank with a known height?

Start with the required operating level span, then account for the sensor's inactive zones and the active-range reduction for the selected media setting. The probe length ranges from 100 to 1600 mm, but the full physical length is not the usable measuring range. Confirm the installation geometry and setpoint limits before ordering.

Q2: What should I check when changing from water to oil service?

Review the dielectric constant and determine whether a coaxial pipe is required. The specified active range and inactive zones also change for oil and oil-based media. Recheck the setpoint limits and confirm that the selected configuration suits the new liquid before commissioning.

Q3: Can I connect the sensor directly to a PLC analog input?

Yes, if the PLC input matches the selected OUT2 signal mode. The sensor supports a scalable 4–20 mA current output or a scalable 0–10 V voltage output. Check the controller input type, current-loop load or voltage-input resistance, wiring, and engineering-unit scaling.

Q4: How can I reduce false switching near the configured level threshold?

Check the set point and reset point rather than adjusting only the PLC logic. The device provides configurable switching behaviour and a specified hysteresis greater than 5 mm. Verify the chosen media setting and ensure both thresholds remain within the permitted range.

Q5: What information should I send when requesting a replacement quotation?

Provide the type designation from the product label, the LR3000 designation shown in your documentation, probe length, process connection, required output mode, and the liquid being measured. Tank operating temperature and pressure, plus any IO-Link requirement, will help confirm whether the proposed configuration matches your application.

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