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Brand: Turck
Turck LS-551-0000-LIU22PN8X-H1151 Guided Wave Level Sensor G 3/4
Description
What the LS-551-0000-LIU22PN8X-H1151 does
LS-551-0000-LIU22PN8X-H1151 is an LS-551 level sensor with an analog output and two switching outputs or IO-Link, a G 3/4 male process thread with an NBR-bound aramid seal and a display housing that can be rotated.
Datasheet feature summary: Process pressure up to 145 psi; Small inactive areas, ideal for small; 1 × transistor output (PNP/NPN switchable)); Process temperature to 212 °F; Compact, rotatable display housing ensures; 12…30 VDC; High flexibility due to cutable probe; Multiple output signals: one system for; Low maintenance and quick commissioning.
Technical specifications
| Parameter | Specification |
|---|---|
| Type | LS-551-0000-LIU22PN8X-H1151 |
| Ident number | 100001844 |
| ID no. | 100001844 |
| Application area | liquids |
| Max. loading of probe | 6 Nm |
| Probe accuracy | ± 5 mm |
| Temperature drift | ≤ 0.1 |
| Hysteresis | ≥ 2 mm |
| Repeatability | ≤ 2 mm |
| Inactive area at process connection | 25 mm |
| Inactive area at probe end | 10 mm |
| Dielectric constant | ≥ 5; ≥ 1.8 with coaxial tube (accessory) |
| Pressure resistance | -1…10 bar |
| Operating voltage | 12…30 VDC |
| Current consumption | ≤ 100 mA |
| Short-circuit/reverse polarity protection | yes / yes |
| Inductive load | <1 H |
| Capacitive load | 100 nF |
| Insulation class | III |
| Output 1 | Analog output (current/voltage, automatic |
| Output 2 | IO-Link/switching output (PNP) |
| Output 3 | Switching output (PNP/NPN) |
| Communication protocol | IO-Link |
| Output function | NO/NC, PNP/NPN, analog output |
| Current output | 4…20 mA |
| High level signal current | 20…20.5 mA |
| Low level signal current | 3.8…4 mA |
| Load resistance current output | ≤ 0.5 kΩ |
| Voltage output | 0…10 V |
| High level signal voltage | Uv – 2 V |
| Low level signal voltage | ≤2V |
| Load resistance voltage output | ≥ 0.75 kΩ |
| Response time typical | < 400 ms |
| IO-Link specification | V 1.1 |
| IO-Link port type | Class A |
| Transmission physics | COM 2 (38.4 kBaud) |
Where it fits and how it behaves
Select this G-thread version for metric-thread tanks and fittings, and the NPT-thread LS-534 type for American-thread installations. The cut-to-length probe lets installers match tank depth, and a coaxial tube accessory enables use with non-metallic vessels or low-dielectric liquids, as the datasheet notes with a minimum dielectric constant of 1.8 using the tube. Medium temperature and pressure limits, along with the 6 Nm probe loading, should be checked against the process.
Installation hint: cut the probe to the required length before fitting and keep the cut end clean, make sure the process thread, seal and tightening torque fit the tank connection, and keep the probe away from metal walls and internal fittings unless the coaxial tube accessory is used. Check the inactive zones at the thread and probe tip against your alarm levels.
Type code, ident number and checks
Derived from the datasheet: the series name LS-5xx is followed by a probe-length figure where printed (cut-to-length here), the output block (analog plus switching outputs as in the datasheet title) and the connector code. The process thread is n/a. Ident number 100001844 identifies this exact version.
Points to confirm with us before ordering: the process thread type (G or NPT), the medium and its dielectric constant, the output configuration, the tank depth against the probe length, and process temperature and pressure. Everything in the table comes from the datasheet as published, so the maker document is the final reference.
Documents and quotation
The official Turck datasheet for LS-551-0000-LIU22PN8X-H1151 is hosted here as a PDF so you can check every value before you send an RFQ. Seven Star LLC is an independent supplier in Muscat; we do not set the manufacturer’s specifications, and this page restates what the datasheet prints. For availability and a quotation, send the exact code LS-551-0000-LIU22PN8X-H1151 and your quantity through the Level Instrumentation category or the RFQ form.
Datasheets & Documents
- Datasheet Turck LS-551-0000-LIU22PN8X-H1151 Datasheet Download
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About brand
Turck is the German automation company for sensors, connectivity, fieldbus I/O and interface technology. It grew from Hans Turck's engineering office in Mülheim an der Ruhr: in 1965 a chemical plant ordered an isolation amplifier for intrinsically safe circuits, and the first 20 units were built by his brother Werner Turck in Halver. The family-owned Turck group is still headquartered in Mülheim an der Ruhr, with production in Halver and other sites.
Seven Star LLC is an independent supplier in Muscat. We list Turck sensors and I/O devices for machine builders and maintenance teams in Oman and the GCC.
Turck company profile
| Founded | 1965, Germany, by the brothers Hans and Werner Turck |
|---|---|
| First product | An isolation amplifier with intrinsically safe circuits for explosion-protected areas, first supplied to Chemische Werke Hüls |
| Headquarters | Mülheim an der Ruhr, Germany; production in Halver |
| Ownership | Family-owned group; Turck Holding was formed in 1994 |
| Product families | Inductive, capacitive and ultrasonic sensors, TBEN block I/O and fieldbus modules, IO-Link masters and hubs, connectors and cordsets, isolating barriers and interface modules, RFID systems |
Milestones
- 1965: An order from a German chemical plant for an amplifier module starts the business; Werner Turck builds the first 20 units.
- 1970: Hans Turck KG and Werner Turck KG are registered as separate companies.
- 1975: Hans Turck KG opens its building in Mülheim an der Ruhr.
- 1994: Turck Holding combines the two Turck companies under one roof.
Turck product series
Most of the Turck products here are inductive proximity sensors: threaded M12, M18 and M30 barrels in flush (BI) and non-flush (NI) versions, uprated-range (U) sensors, rectangular CP40 and CP80 housings and BIM magnetic-field sensors for detecting pistons in pneumatic cylinders. The type code describes the sensor; in BI5-M18-AP6X-H1141, BI means flush mounting, 5 is the switching distance in mm, AP6X a three-wire PNP output and H1141 the M12 connector.
Turck also makes RU ultrasonic sensors, PS pressure, TS temperature and LS level sensors, FCI inline flow sensors, the CMVT vibration and temperature sensor for condition monitoring over IO-Link, and fieldbus and Ethernet I/O modules and communication components.
Where Turck sensors are used
Position detection on conveyors, packaging machines, presses and robotic cells; level, pressure and temperature monitoring on hydraulic units and process skids; and vibration monitoring on motors, pumps and fans.
Turck products we list
Ordering Turck sensors: what we need
Send the full type code and the six- or seven-digit ID number printed on the sensor or its label. If the label is missing, give the housing size, flush or non-flush mounting, switching distance, output type (PNP or NPN, NO or NC), supply voltage and connection (cable or connector).
Facts checked against Turck's published company history, October 2026.
Browse Turck products by category: Inductive Proximity Sensors, Flow Indicators & Switches, Level Instrumentation, Pressure Instrumentation, Temperature Instrumentation, Vibration Monitoring.
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Frequently Asked Questions
What medium and temperature does LS-551-0000-LIU22PN8X-H1151 suit?
Application area liquids; medium temperature see datasheet; pressure resistance -1…10 bar.
What outputs does LS-551-0000-LIU22PN8X-H1151 provide?
NO/NC, PNP/NPN, analog output; current output 4…20 mA, voltage output 0…10 V; IO-Link V 1.1.
What process connection does LS-551-0000-LIU22PN8X-H1151 use?
G 3/4'' male thread; wetted parts Stainless steel 1.4404 (AISI 316L), PTFE,.
What accuracy does LS-551-0000-LIU22PN8X-H1151 state?
Probe accuracy ± 5 mm, repeatability ≤ 2 mm, hysteresis ≥ 2 mm.
What should I confirm before ordering LS-551-0000-LIU22PN8X-H1151?
Confirm the process thread type (G or NPT), the medium and its dielectric constant, the output configuration, the tank depth against the probe length, and process temperature and pressure.
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