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Brand: SICK
SICK MM12-70A-N-ZC0 MMN Magnetic Proximity Sensor
Description
MM12-70A-N-ZC0 is a SICK MMN magnetic proximity sensor (part no. 1102540) that switches when a permanent magnet comes within its sensing range. The catalogue summary lists: sensing range Sn: 70 mm; switching output: NAMUR; connection type: Male connector M12, 4-pin; housing material: Nickel-plated brass.
How the MM12-70A-N-ZC0 works and where it fits
A magnetic proximity sensor responds to a magnetic field rather than to the object itself, so a small permanent magnet fixed to a piston, slide, valve stem or door marks the position. Because magnetic fields pass through non-ferrous metals, plastics and many other materials, the sensor can sit outside a sealed housing and still detect the magnet inside.
Always design with Sa and not with Sn. Magnet size and strength decide how far a particular magnet is detected. Output polarity and function matter for the controller: PNP and NPN are not interchangeable, and a NAMUR output needs an isolating switch amplifier.
Technical specifications
| Parameter | Specification |
|---|---|
| Type code | MM12-70A-N-ZC0 |
| Part number | 1102540 |
| Product family | MMN |
| Housing | Metric |
| Thread size | M12 x 1 |
| Diameter | Ø 12 mm |
| Sensing range Sn | 5 mm … 70 mm |
| Safe sensing range Sa | 56.7 mm |
| Magnetic sensitivity | 0.7 mT |
| Switching frequency | 1,000 Hz |
| Connection type | Male connector M12, 4-pin |
| Switching output | NAMUR |
| Switching output detail | NAMUR |
| Output characteristic | Control current depending on switching state according to NAMUR EN 60947-5-6 |
| Electrical wiring | DC 2-wire |
| Magnetic alignment | Axial |
| Enclosure rating | IP67 |
| Time delay before availability | ≤ 2 ms |
| Reproducibility | ≤ 1 % |
| Temperature drift (of Sr) | ± 10 % |
| Current consumption, sensor is activated | ≥ 2.3 mA |
| Current consumption, sensor is not activated | ≤ 1 mA |
| Cable resistance | ≤ 50 Ω |
| Wire-break protection | Yes |
| Ambient operating temperature | –25 °C … +70 °C |
| Housing material | Nickel-plated brass |
| Housing length | 62.5 mm |
| Thread length | 40 mm |
| Tightening torque, max. | ≤ 7 Nm |
| Type approval certificate | TÜV 19 ATEX 241335 |
| 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; ATEX certificate |
Type code MM12-70A-N-ZC0 and what to check before ordering
Electrically and for the interface, the listed values are current: ≥ 2.3 mA; frequency: 1,000 Hz; range: 5 mm … 70 mm; outputs: NAMUR; connection: male connector M12, 4-pin.
Mechanical and environmental data for this type: operating temperature –25 °C … +70 °C; enclosure rating IP67; vibration 30 g, 11 ms / 10 … 55 Hz, 1 mm; housing nickel-plated brass.
A differently coded connector or cable length is a different part number.
Typical uses are position sensing of pistons and slides in machines, guard and door position, valve open and closed feedback, and detection through stainless steel or aluminium walls. Check the enclosure rating, the operating temperature and the housing material in the table; plastic and brass housings behave differently in aggressive or washdown conditions.
Related SICK products: SICK MZT8-03VPS-KP0 MZT8 T-Slot Magnetic Cylinder Sensor, PNP, SICK MZT7-2V2PS-KU0 MZT7 Cylinder Sensor, SICK MZC1-4V3PS-KR0 MZC1 C-Slot Cylinder Sensor, PNP, SICK RZT7-03ZUS-KWB T-Slot Cylinder Sensor, SICK RZT7-03ZWS-KW0 RZT7 T-Slot Cylinder Sensor, Reed, AC/DC and SICK MM12-90APS-ZC0 MME Magnetic Proximity Sensor.
Documents and quotation
Attached to this page: the SICK data sheet for MM12-70A-N-ZC0, part no. 1102540, as published by SICK. Send the type code, quantity and delivery location through the RFQ form and Seven Star LLC, an independent supplier in Muscat, will respond with a quotation. Similar products sit under Sensors & Transmitters. Confirm the full code against the device it replaces; if this page and the data sheet ever disagree, follow the data sheet.
Datasheets & Documents
- Datasheet SICK MM12-70A-N-ZC0 official data sheet (part no. 1102540) 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.
FAQ
Questions about the SICK MM12-70A-N-ZC0 MMN Magnetic Proximity Sensor
Answers from our engineering team on installation, compatibility and integration.
01What is the SICK MM12-70A-N-ZC0?
It is a SICK magnetic proximity sensor (MMN), part no. 1102540. The catalogue summary reads: Sensing range Sn: 70 mm; Switching output: NAMUR; Connection type: Male connector M12, 4-pin; Housing material: Nickel-plated brass.
02What supply does the MM12-70A-N-ZC0 need?
See the data sheet for the supply. Check the output and interface rows in the table for the signal levels.
03What protection rating and temperature range are given?
Enclosure rating: IP67. Ambient operating temperature: –25 °C ... +70 °C. Confirm both against the site before ordering.
04Does the page include the data sheet?
Yes. The official SICK data sheet for part no. 1102540 is attached as a PDF and linked on this page; where it differs from the page text, the data sheet applies.
05What should be confirmed before ordering the MM12-70A-N-ZC0?
Compare the full type code and part number 1102540 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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