Level Instrumentation > Transmitters > Siemens SITRANS LR250

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Siemens SITRANS LR250 Two-Wire Pulse Radar for Liquid and Slurry Level Measurement

Siemens SITRANS LR250 two-wire continuous radar level transmitter for liquid and slurry applications is easy to install and quick to configure. Its narrow horn and beam, along with Siemens Process Intelligence algorithms, ensure that the LR250 provides high accuracy of low and high levels, even with low dielectric media.

The LR250 is now available in four versions: a horn antenna for liquid and slurry measurement, a PVDF antenna for use with corrosive or aggressive materials, a flanged encapsulated antenna for use with corrosive or aggressive media, and a hygienic encapsulated antenna for sanitary applications.

The LR250 horn antenna model is a suitable replacement for the retired SITRANS LR400 liquid level radar transmitter.

Key Specifications

  • 25GHz pulse radar for continuous level measurement of liquids and slurries
  • LR250 Horn Antenna: 66-foot range, process temperatures -40° to 392°F, pressures to 560 PSIG
  • LR250 PVDF Antenna: 33-foot range, process temperatures -40° to 176°F, pressures to 72.5 PSIG
  • LR250 Flanged Encapsulated Antenna: 66-foot range, process temperatures
    -40° to 338°F
  • LR250 Hygienic Encapsulated Antenna (Sanitary): Minimum 2" to 66-foot range — use more tank for your process, process temperatures -40° to 338°F
  • Non-contact: Not influenced by dust or acoustic noise (filling)
  • Narrow beam angle allows installation almost anywhere in your tank
  • Process Intelligence algorithms for echo processing adjust on the fly to changes in process conditions
  • Use with Siemens infrared handheld programmer for local configuration; Compatible with SIMATIC PDM via HART for configuration with a PC
  • View our full offering of Siemens Milltronics level instrumentation

Model Selection Guide

Use this table to find the right model for your application.  Don't see the option you need? Call a Lesman sales specialist at 800-953-7626

SITRANS LR250 Two-Wire 25 GHz Pulse Radar with Stainless Steel Horn Antenna
A complete catalog number will look like this: 7ML5431-_ _ _ _0-_ _ _ _

Description Catalog
Number
SITRANS LR250 Two-Wire 25GHz Pulse Radar 7ML5431-
Process
Connection
316L SS, PTFE Emitter, FKM Seal
316L SS, PTFE Emitter, FFKM Seal
0_ _ _ _-
1_ _ _ _-
Process
Connection
Type
1.5" NPT Taper (ANSI/ASME B1.20.1) [1]
2" NPT Taper (ANSI/ASME B1.20.1)
2" ASME, 150 Lb
3" ASME, 150 Lb
4" ASME, 150 Lb
_AA_ _-
_AD_ _-
_BA_ _-
_BB_ _-
_BC_ _-
Communication 4-20 mA, HART® (Startup at <3.6 mA)
PROFIBUS PA
_ _ _20-
_ _ _10-
Enclosure Aluminum, Epoxy Paint, 2x 1/2" NPT Inlets 0_ _ _
Antenna 1.5" Horn
2" Horn (Fits ASME Nozzles)
3" Horn (Fits ASME Nozzles)
4" Horn (Fits ASME Nozzles)
1.5" Horn with 100 mm Extension
2" Horn with 100 mm Extension
3" Horn with 100 mm Extension
4" Horn with 100 mm Extension
_A_ _
_B_ _
_C_ _
_D_ _
_E_ _
_F_ _
_G_ _
_H_ _
Approvals General Purpose CE, CSA, FM, FCC
Intrinsically Safe CSA.FM, FCC [2]
Non-Incendive CSA/FM, FCC
Explosion Proof FM
_ _A_
_ _B_
_ _D_
_ _H_
Pressure 7.5 PSI (0.5 bar) Max. Pressure Rating _ _ _1
SIL2 [4] Functional Safety, SIL 2 Compliance Cert ,Z-C20
Accessories English User Manual
English User Manual, Profibus
Handheld Programmer, IS
HART® Modem, USB
A5E32220602
A5E32221386
7ML1930-1BK
7MF4997-1DB

SITRANS LR250 Two-Wire 25 GHz Pulse Radar with Threaded PVDF Antenna
A complete catalog number will look like this: 7ML5431-_ _ _ _0-_ _ _ _

Description Catalog
Number
SITRANS LR250 Two-Wire 25GHz Pulse Radar 7ML5431-
Connection 2" NPT Threaded PVDF Antenna 4PA _ _-
Communication 4-20 mA, HART® (Startup at <3.6 mA)
PROFIBUS PA
_ _ _20-
_ _ _10-
Enclosure Aluminum, Epoxy Paint, 2x 1/2" NPT Inlets 0R _ _
Approvals General Purpose CE, CSA, FM, FCC
Intrinsically Safe CSA.FM, FCC [2]
Non-Incendive CSA/FM, FCC
Explosion Proof FM
_ _A_
_ _B_
_ _D_
_ _H_
Pressure Rating per Pressure/Temperature Curves _ _ _2
SIL2 [4] Functional Safety, SIL 2 Compliance Cert ,Z-C20
Accessories English User Manual
English User Manual, Profibus
Handheld Programmer, IS
HART® Modem, USB
A5E32220602
A5E32221386
7ML1930-1BK
7MF4997-1DB

Also available in flanged encapsulated and hygienic encapsulated antenna radar transmitter versions for corrosive,
harsh media, or sanitary applications.

Notes:

[1] For 1.5" horn antenna only.
[2] Intrinsic safety barrier required.
[3] NO IS barrier required. Available only with HART® communications option.
[4] For HART models with general purpose or intrinsically safe approvals only.

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