Airtac EMSH Electronic Sensor EMSH-C12
The AirTAC Airtac EMSH Electronic Sensor EMSH-C12 is a genuine EMS magnetic position switch. It senses the magnet ring in a pneumatic cylinder's piston and signals when the piston reaches that point, giving a 2-wire output on 10-28 V DC. It only works on a cylinder that carries a piston magnet.
- TechnologyElectronic (solid-state), miniature build
- Output2-wire
- Supply voltage10-28 V DC
- ProtectionIP64
- Profile (groove fit)H
- Lead / connectorSee datasheet
- VersionStandard
- RequiresMagnet-equipped cylinder
About the Airtac EMSH Electronic Sensor EMSH-C12
AirTAC's EMSH-C12 is a mini electronic position switch in the H profile, built as a solid-state 2-wire unit that detects the magnet in an AirTAC cylinder's piston. It runs from a 10-28 V DC supply and the general-type body is protected to IP64.
The wiring position of this code reads C12. We know the M8 and M12 tokens in this position are connectors, but the meaning of C12 is not covered by our data - it is a factory connection variant we will confirm from the datasheet on request, so no lead length or connector type is claimed here. Solid-state switching means no moving contact to bounce or wear, which helps on circuits that pulse frequently. The H in the code sets the groove fit for the cylinder body, so check it against your cylinder's sensor channel before ordering.
Airtac EMSH Electronic Sensor EMSH-C12 Technical Specifications
| Model | Airtac EMSH Electronic Sensor EMSH-C12 |
|---|---|
| Family | EMS — Mini electronic cylinder switch |
| Technology | Electronic (solid-state), miniature build |
| Output | 2-wire |
| Outputs in this family | 2-wire only |
| Lead / connector | See datasheet |
| Supply voltage | 10-28 V DC |
|---|---|
| Protection rating | IP64 |
| Version | Standard version |
| Profile letter | H (cylinder-groove fit) |
| Profiles in this family | G, H |
| Detects | Piston magnet ring inside the cylinder |
Every EMS is 2-wire on a 10-28 V DC supply; there is no NPN / PNP version. IP64 as standard. Order the RW version where coolant, washdown or constant cable flexing is present. Switching distance, response time, current rating, voltage drop, LED behaviour, contact life, weight and dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
Model Code: Airtac EMSH Electronic Sensor EMSH-C12
| EMS | Mini electronic cylinder switch — electronic (solid-state), miniature build. |
|---|---|
| H | Profile letter: the mounting / groove type that fits a particular cylinder body. This family offers G, H. It is a fit code, not a performance grade. |
| 12 | See datasheet. 020 / 030 / 050 / 100 are 2 / 3 / 5 / 10 m flying leads; M08 and M12 are M8 / M12 connector versions. |
| (blank) | Standard version. |
We do not hold the full profile-to-cylinder-series table, so confirm the profile letter against your cylinder model before ordering — send us the cylinder part number and we will check the fit.
Which Family Do You Need?
- DMSElectronic, 2-wire / NPN / PNP, DC
- EMSMini electronic, 2-wire only, DC
- CMSReed contact, 2-wire, 5-240 V AC/DC
The split is electrical, not quality. Solid-state DMS and EMS are DC-only and suit modern PLC inputs; the reed-based CMS switches a much wider window, so it is the one for AC circuits, relay logic and older panels. The RW (IP68) option exists on DMS and EMS only.
| This switch | EMSH · 2-wire · 10-28 V DC |
|---|---|
| Consider DMS | the full electronic range, including NPN / PNP 3-wire outputs |
| Consider CMS | the reed alternative for AC circuits and voltages up to 240 V |
| Mounting parts | F-MQ (round body), F-ACT (tie-rod) |
Where the Airtac EMSH Electronic Sensor EMSH-C12 Is Used
Tray eject confirm on a blister packer
Fitted to the eject cylinder of a pharmaceutical blister line, the compact EMS body seats in the tight groove of a small-bore cylinder and confirms full extension before the next tray indexes.
Gate interlock on a test rig
A laboratory fatigue-test rig uses the EMSH-C12 on the guard-gate cylinder; the solid-state 2-wire output feeds a safety relay circuit at 24 V DC with no contact chatter to false-trigger the interlock.
Compact drawer actuator feedback
On an automated tool-storage cabinet, the sensor clips to the short drawer-push cylinder, giving the controller a reached-home signal through the C12 connection once the datasheet variant is confirmed.
Is the Airtac EMSH Electronic Sensor EMSH-C12 the Right Switch?
Use this model when you need the compact electronic sensor in the H groove fit and your circuit is DC at 10-28 V. The EMS family is 2-wire only, so it wires in series with your load much like a mechanical contact - straightforward, with a small leakage current to budget for. If you would rather have a defined flying lead or a serviceable M8/M12 connector, look at the -020/-030/-050/-100 or -M08*/-M12* codes instead; the C12 connection here needs datasheet confirmation first. As with every magnetic switch, the cylinder must carry the -S magnet option for anything to be detected.
Quick checklist
- ✓ Cylinder has a piston magnet
- ✓ Profile letter fits your cylinder groove
- ✓ Output matches the PLC input (2-wire)
- ✓ Supply rail is 10-28 V DC
- ✓ Lead length or M8 / M12 connector
- ✓ Coolant or flexing? Use the RW version
Installation & Wiring Notes
- check The cylinder must carry a piston magnet — a plain cylinder cannot be sensed.
- check Slide the switch along the groove to the stop position, then lock it.
- check Keep the supply within 10-28 V DC.
- check Wire 2-wire to match the PLC input's polarity.
- check Keep the lead clear of moving parts; use the RW type where it must flex.
- check Rated IP64 — protect it beyond that rating.
Use the F-MQ bracket on round-body cylinders and F-ACT on tie-rod cylinders where there is no groove to seat the switch. Both are ordered separately from the switch. Switching distance and mounting dimensions come from the factory datasheet — ask us for the sheet that matches your cylinder.
Airtac EMSH Electronic Sensor EMSH-C12 FAQ
Type: electronic (solid-state) mini position switch. Output: 2-wire. Supply voltage: 10-28 V DC. Protection: IP64 for the general-type body. Wiring: the code position reads C12, a factory connection variant not defined in our data - we will confirm the exact connector or lead arrangement from the datasheet on request.
The H is the profile code that selects the mounting fit for the cylinder's sensor groove - it is not a performance grade, and it must match your cylinder body or the switch will not seat correctly. C12 sits in the wiring position; unlike M8/M12, its meaning is not in our published data, so we confirm it from the datasheet before you commit. Also verify your cylinder has the magnet option, since the switch senses nothing without it.
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