SITRANS LR550

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SITRANS LR550 is a radar level sensor for continuous measurement up to 120 m of solids or liquids. Its lightweight design makes it ideal for silos, tanks, and outdoor water level monitoring.

Zalo Hotline: 0961.67.69.69

Description
Specifications

Key Features

Continuous level measurement up to 120 m (393 ft) with ±1 mm accuracy, compliant with IEC 62828
Fast setup via 4-button HMI, Bluetooth (SITRANS mobile IQ app), or SIMATIC PDM
Integrated graphical interface with echo profile display and backlit screen for field diagnostics
Built-in IQ Guard for real-time device health monitoring, NE107 diagnostic alerts, and quality reporting
Process Intelligence algorithms ensure stability in noisy and complex environments
Auto False Echo Suppression and Near Range Suppression for reliable measurement under buildup conditions
Supports HART 7 digital communication protocol
Low power consumption and compliant with Environmental Product Declaration (EPD)
Optional Second Line of Defense (SLOD) for enhanced safety in hazardous or toxic material applications
Integrated 100,000-point data logger for historical trend analysis and process optimization
Compliant with API 2350, suitable for overfill prevention in hazardous liquid storage

Typical Applications

SITRANS LR550 is engineered to meet the demands of diverse level measurement environments, including:

Liquids: chemical tanks, process vessels, water storage
Sludge: industrial or municipal wastewater applications
Solids: silos containing granules, powders, or raw bulk materials

Category	Specification
Measuring principle	Radar level measurement
Frequency	W band (80 GHz nominal)
Minimum detectable distance	0 m from end of the antenna (antenna dependent, reference conditions)
HART	Version 7
Analog output	4 … 20 mA
Fail-safe	Programmable as high, low, or hold (loss of echo)
Update time	Up to 3 measurements per second
Maximum measured error	1 mm (0.039 inch)
Influence of ambient temperature	Less than 3 mm/10 K and maximum ±5 mm over full range from -40 … +80 °C (-40 … +176 °F)
API standard	API 3.1B Inventory
Installation location	Indoor/outdoor
Ambient temperature (enclosure)	-40 … +80 °C (-40 … +176 °F)
Storage temperature	-40 … +80 °C (-40 … +176 °F)
Installation category	I
Pollution degree	4
Dielectric constant εr	> 1.6, antenna and application dependent
Weight	Range from 2 … 20 kg (4.4 … 44.1 lb), version dependent
Enclosure material	Aluminum, polyester powder-coated, C5 corrosion equivalent
Cable inlet	2 x M20 x 1.5 or 2 x ½” NPT
Degree of protection	Type 4X, Type 6, IP66, IP68
Local display	Optional graphical HMI with NE107 diagnostic data, echo profile display and backlight
Trend logging	100,000 points, up to 8 variables including level, distance, space, volume, signal strength, confidence, temperature
Limit monitoring	Min/Max of 3 variables with count function
Terminal voltage	Available from HMI or EDD
Asset management	Diagnostic logbook, parameter change logbook
Power supply	Nominal 24 V DC (max. 30 V DC) with max. 800 Ω
Approvals – ordinary locations	FM, _CCSA_US, CE
Approvals – radio	CE, FCC, IC, RCM
Hazardous area approvals	ATEX, IECEx, Intrinsically Safe Ex ia IIC T6 Ga ATEX, IECEx, Intrinsically Safe Ex ia IIIC Txx°C Da ATEX, IECEx, Dust Ignition proof Ex ta IIIC Txx°C Da ATEX, IECEx, CSA, FM, NEPSI, PESO, INMETRO EX II 1GD Ex ia IIC T6 … T4 Ga Ex ia IIIC T200 95°C Da Ex ia IIIC T200 135°C DaCSA/FM Intrinsically Safe Ex ia I, II, III, Div 1, Groups A, B, C, D, E, F, G T6 CSA/FM Non-Incendive Class I, Div. 2, Groups A, B, C, D T6
Material certifications	3.1 of EN 10204, NACE MR 0175 and MR 0103, 2.2 of EN 10204, PMI
Pressure certifications	CRN, PED
CRN – British Columbia	0F7424.1
CRN – Alberta	0F22399.2
CRN – Saskatchewan	0F7424.13
CRN – Manitoba	0F7424.14
CRN – Ontario	0F7424.15
CRN – Quebec	0F7424.16
CRN – Atlantic Canada and Territories	0F1384.9870YNT
Programming via PC	SIMATIC PDM
SITRANS mobile IQ app	Optional AW500 Bluetooth module, for non-hazardous applications only
Category	Specification
Recommended measuring range	Beam angle 3°: 120 m (394 ft)
Process temperature	• PP lens, PP seal: -40 … +80 °C (-40 … +176 °F) • PP lens, FKM seal: -40 … +80 °C (-40 … +176 °F) • PP lens, EPDM: -40 … +80 °C (-40 … +176 °F)
Process pressure	2 bar max. Note: Pipe applications are not recommended. For exceptions, contact Royal Technique technical support.
Flange material	PP-GF30
Wetted materials – Antenna lens	PP, FKM, or EPDM
Wetted materials – Antenna seal	FKM or EPDM
Wall and ceiling bracket	316/316L stainless steel
Process connections	• DN100 PN 6, flat face • DN100 PN16, flat face • DN150 PN16, flat face • DN200 PN16, flat face • DN250 PN16, flat face • 3″ 150lb FF • 4″ 150lb FF • 6″ 150lb FF • 8″ 150lb FF • DN100 10K FF, JIS • DN150 10K FF, JIS

SITRANS LR550

Key Features

Typical Applications

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