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Brand: SICK
SICK UM18-21812D211 UM18 Ultrasonic Sensor
Description
UM18-21812D211, part no. 6066184, is a SICK UM18 ultrasonic distance sensor that detects solid, liquid and powder surfaces independently of colour or transparency. The catalogue summary lists: communication interface: IO-Link; operating range, limiting range: 120 mm … 1,000 mm, 1,300 mm; connection type: Male connector, M12, 5-pin; sending axis: Straight; response time: 80 ms.
What the UM18-21812D211 does in a machine
Distance follows from the speed of sound, which is why the sensor includes temperature compensation: sound travels faster in warm air. Because the principle depends on reflection of sound rather than light, it is largely indifferent to colour, gloss and transparency.
Clear film, glass, liquids, and dark or shiny parts all return an echo, which makes ultrasonic sensors a common choice for level and distance in tanks, hoppers and on conveyors. Teach-in lets the switching points be set by placing the object, while the operating modes in the table decide whether the output follows a switching point or a switching window.
Technical specifications
| Parameter | Specification |
|---|---|
| Type code | UM18-21812D211 |
| Part number | 6066184 |
| Product family | UM18 |
| Operating range, limiting range | 120 mm … 1,000 mm, 1,300 mm |
| Resolution | ≥ 0.069 mm |
| Measurement accuracy | ± 1 % |
| Temperature compensation | Yes |
| Response time | 80 ms |
| Switching frequency | 10 Hz |
| Output time | 20 ms |
| Ultrasonic frequency (typical) | 200 kHz |
| Safety-related parameters: MTTFD | 101 years |
| Safety-related parameters: DCavg | 0% |
| IO-Link | ✔ , IO-Link V1.1 |
| Function | Process data, parameterization, diagnosis, data storage |
| Digital output: Number | 1 |
| Digital output: Type | Push-pull: PNP/NPN |
| Digital output: Maximum output current IA | ≤ 100 mA |
| Analog output: Number | 1 |
| Analog output: Type | Voltage output |
| Analog output: Voltage | 0 V … 10 V, ≥ 100,000 Ω |
| Analog output: Resolution | 12 bit |
| Multifunctional input (MF) | 1 x MF |
| Supply voltage UB | DC 10 V … 30 V |
| Power consumption | ≤ 1.2 W |
| Enclosure rating | IP65 / IP67 |
| Dimensions (W x H x D) | 18 mm x 18 mm x 52.7 mm |
| Design | Cylindrical |
| Sending axis | Straight |
| Housing material | Metal (nickel-plated brass, ultrasonic transducer: polyurethane foam, glass epoxy resin) |
| Declarations and certificates in the data sheet | EU declaration of conformity; UK declaration of conformity; ACMA declaration of conformity; Moroccan declaration of conformity; China RoHS; China Compulsory Product Certification (CCC) exempt; cULus certificate; Information according to Art. 3 of Data Act (Regulation EU 2023/2854) |
Ordering UM18-21812D211: type code, part number and fit
On the electrical side, the data sheet gives response time is 80 ms; resolution is ≥ 0.069 mm; power draw is ≤ 1.2 W; current is ≤ 100 mA; supply is DC 10 V … 30 V; connection is male connector, M12, 5-pin; frequency is 10 Hz.
Before choosing the mounting position, check enclosure rating of IP65 / IP67; weight of 25 g; dimensions of 18 mm x 18 mm x 52.7 mm.
Before ordering, confirm the operating range and the limiting range, the output (switching, analog current or voltage, or IO-Link), the supply voltage, the housing size and thread, and the connector.
Check the operating temperature, the enclosure rating and the housing material in the table against the medium; condensation or aggressive vapours may need a sealed or special version.
Related SICK products: SICK UM18-218166101 UM18 Ultrasonic Distance Sensor, 4-20 mA, SICK UM30-212113 UM30 Ultrasonic Distance Sensor, SICK UM18-211167101 UM18 Ultrasonic Distance Sensor, 0-10 V, SICK UM30-213113 UM30 Ultrasonic Distance Sensor, 200-1,300 mm, SICK UC4-13347 UC4 Ultrasonic Distance Sensor, 0-10 V and SICK UFN3-70B413 UF Ultrasonic Fork Sensor for Label Detection.
Documents and quotation
Use the attached SICK data sheet (UM18-21812D211, part no. 6066184) to check wiring, mounting and approvals. To request a quotation, submit the part number with quantity and destination in the RFQ form; Seven Star LLC is an independent supplier based in Muscat. Related SICK items are listed under Sensors & Transmitters. Check wiring, mounting and approvals against the data sheet before you order, since the data sheet is the governing document.
Datasheets & Documents
- Datasheet SICK UM18-21812D211 official data sheet (part no. 6066184) Download
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About brand
SICK is the German maker of industrial sensors: photoelectric and proximity sensors, safety laser scanners and light curtains, encoders, distance sensors, code readers and gas analysers. Erwin Sick, an optics engineer, founded it in Munich in 1946, and in 1952 it introduced its first marketable accident-prevention light curtain, which protected press operators by stopping the machine when a hand broke the light beam. The company moved to Waldkirch in the Black Forest in 1956 and is still headquartered there. It is a privately held company, and has been an Aktiengesellschaft (AG) since 1996.
SICK company profile
| Founded | 1946, Munich, Germany, by Erwin Sick (1909–1988) |
|---|---|
| Headquarters | Waldkirch, Baden-Württemberg, Germany (since 1956) |
| Ownership | Privately held; after the founder's death in 1988 his widow Gisela Sick became the main shareholder. Legal form SICK AG since 1996 |
| Size | More than 12,000 employees and group revenue of about EUR 2.3 billion (company figures for 2023) |
| First breakthrough | Accident-prevention light curtain for presses, shown in Hanover in 1952 |
| International growth | First foreign subsidiary in France in 1972, United States in 1976; today sales and service companies worldwide |
| Product families | Photoelectric, inductive, capacitive, magnetic and ultrasonic sensors; safety laser scanners, light curtains, safety controllers and relays; encoders and motor feedback systems; distance sensors and LiDAR; barcode and 2D code readers and machine vision; gas analysers, dust and flow measurement for process and emissions monitoring |
Milestones
- 1946: Erwin Sick receives a licence to run his engineering firm in Munich.
- 1952: The first marketable accident-prevention light curtain is presented in Hanover and goes into series production.
- 1956: The company moves to Waldkirch with 25 employees.
- 1972 and 1976: Subsidiaries are founded in France and the United States.
- 1996: SICK becomes an Aktiengesellschaft.
- Today: Sensors for factory and logistics automation, machine safety and process analysis, with a large share of revenue outside Germany.
Choosing a SICK sensor
For object detection, the sensing principle comes first. A retro-reflective sensor (WL series) sends light to a reflector and switches when an object breaks the beam; it is reliable over long distances and easy to align. A sensor with background suppression (WTB series) detects an object at a set distance and ignores what is behind it, which suits conveyors with shiny or dark backgrounds. A through-beam pair (WS/WE) gives the longest range and the highest reliability in dust. For transparent bottles and film, use a model built for transparent objects (for example WL12G-3B or WL150-P420). The digits in the code also matter: "P" usually means a PNP output and "N" NPN, and the last digits set the connector or cable. For machine guarding, a safety laser scanner such as nanoScan3 or microScan3 protects an area, while a safety controller such as Flexi Soft combines several safety devices.
Where SICK products are used
In Oman and the GCC, SICK sensors are used in packaging and bottling lines, food and beverage plants, logistics and airport baggage handling, cement and steel plants, ports and cranes, automated warehouses, and on machines built by European OEMs. SICK safety scanners guard robots and automated guided vehicles, and its encoders give position feedback on motors, hoists and conveyors.
SICK products we list
| Family | Examples |
|---|---|
| Photoelectric sensors | WL12-3P2431, WTB12-3P2431, GTB6-P4211, VL18-4P3240, WL12G-3B2531, WS/WE100, KT5W contrast, W26 IO-Link |
| Proximity, cylinder and ultrasonic sensors | IME12-08NPSZC0S, IME18-05BPSZC0S, MZT8, UM18 4-20 mA, UM30, UFN3 fork |
| Machine safety | nanoScan3, microScan3, S300 Professional, Flexi Soft FX3-CPU1, FX3-XTIO, ReLy OSSD |
| Encoders and motor feedback | DFS60B, AFM60 PROFINET, AFS60 SSI, ATM60 PROFIBUS, SRS50, EFS50 |
| Distance sensors and code readers | DT50, DL50, DT35, Lector632 |
Ordering SICK products: what we need
Send the type code and the 7-digit SICK part number from the label (for example WTB12-3P2431 together with its part number). For a replacement sensor, add the output (PNP or NPN), connection (M8, M12 or cable) and sensing distance. For encoders, add the interface (incremental, SSI, PROFIBUS, PROFINET), resolution and shaft type. For safety scanners, tell us the model and whether the existing configuration needs to be kept.
Facts checked against SICK's published company history and annual figures, October 2026.
Browse SICK products by category: Sensors & Transmitters.
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Frequently Asked Questions
What is the SICK UM18-21812D211?
It is a SICK ultrasonic sensor (UM18), part no. 6066184. The catalogue summary reads: Communication interface: IO-Link; Operating range, limiting range: 120 mm ... 1,000 mm, 1,300 mm; Connection type: Male connector, M12, 5-pin; Sending axis: Straight.
Which supply voltage applies to the UM18-21812D211?
Supply voltage is DC 10 V ... 30 V. Check the output and interface rows in the table for the signal levels.
What protection rating and temperature range are given?
Enclosure rating: IP65 / IP67. Confirm both against the site before ordering.
Does the page include the data sheet?
Yes. The official SICK data sheet for part no. 6066184 is attached as a PDF and linked on this page; where it differs from the page text, the data sheet applies.
What should be confirmed before ordering the UM18-21812D211?
Compare the full type code and part number 6066184 with the device being replaced, check supply, output or interface and mounting, and send the details through the RFQ form. Seven Star LLC is an independent supplier, not a SICK partner.
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