Airtac CMSG Reed Switch Sensor CMSG-030
The AirTAC Airtac CMSG Reed Switch Sensor CMSG-030 is a genuine CMS 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 5-240 V AC/DC with a 3 m flying lead. It only works on a cylinder that carries a piston magnet.
- TechnologyReed (magnetic contact)
- Output2-wire
- Supply voltage5-240 V AC/DC
- ProtectionIP64
- Profile (groove fit)G
- Lead / connector3 m flying lead
- VersionStandard
- RequiresMagnet-equipped cylinder
About the Airtac CMSG Reed Switch Sensor CMSG-030
This is the general-type CMSG-030, a reed magnetic position switch from AirTAC. The reed element is a sealed mechanical contact that snaps closed when the magnet built into the cylinder piston reaches the switch position - no electronics, no amplifier, just a contact. Output is 2-wire for series wiring, the operating supply spans 5-240 V AC or DC with no polarity, protection is IP64, and the unit arrives with a 3 m flying lead ready to cut back to length.
A practical point: at 5 V DC low-voltage levels a reed contact needs no load-wiring fuss, while at 240 V AC it slots directly into older relay control panels - one switch covering both worlds. The G profile is the mounting-fit code and must correspond to the sensor groove of your cylinder; confirm the pairing with your cylinder model. The switch reads nothing by itself, so the cylinder must be ordered with the magnet option fitted.
Airtac CMSG Reed Switch Sensor CMSG-030 Technical Specifications
| Model | Airtac CMSG Reed Switch Sensor CMSG-030 |
|---|---|
| Family | CMS — Reed switch cylinder sensor |
| Technology | Reed (magnetic contact) |
| Output | 2-wire |
| Outputs in this family | 2-wire contact |
| Lead / connector | 3 m flying lead |
| Supply voltage | 5-240 V AC/DC |
|---|---|
| Protection rating | IP64 |
| Version | Standard version |
| Profile letter | G (cylinder-groove fit) |
| Profiles in this family | E, G, H, J |
| Detects | Piston magnet ring inside the cylinder |
A reed contact switches a wide window, 5-240 V AC or DC, which is why it suits AC circuits and relay logic. IP64. The CMS range has no RW / IP68 option - that belongs to DMS and EMS. 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 CMSG Reed Switch Sensor CMSG-030
| CMS | Reed switch cylinder sensor — reed (magnetic contact). |
|---|---|
| G | Profile letter: the mounting / groove type that fits a particular cylinder body. This family offers E, G, H, J. It is a fit code, not a performance grade. |
| 030 | 3 m flying lead. 020 / 030 / 050 / 100 are 2 / 3 / 5 / 10 m flying leads; M08 and M12 are M8 / M12 connector versions. |
| (blank) | Standard version. On a CMS the suffix -H is the high-temperature version — do not confuse it with the H profile letter. |
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 | CMSG · 2-wire · 5-240 V AC/DC |
|---|---|
| Consider DMS | the solid-state range with NPN / PNP 3-wire outputs (DC only) |
| Consider EMS | the mini 2-wire solid-state switch (DC only) |
| Mounting parts | F-MQ (round body), F-ACT (tie-rod) |
Where the Airtac CMSG Reed Switch Sensor CMSG-030 Is Used
Sorting diverter station
Detects full extension of the diverter cylinder on a parcel-sort conveyor, its 2-wire contact feeding a legacy 230 V AC relay panel without interface modules.
Concrete block press
Confirms mould closure on a block-making press where the dusty plant environment and simple AC control wiring favor a sealed mechanical reed contact.
Car-wash arm cylinders
Tracks arm position on automatic car-wash gantries, with the 3 m lead routed back to a washdown-rated control cabinet outside the wet zone.
Is the Airtac CMSG Reed Switch Sensor CMSG-030 the Right Switch?
Pick CMSG-030 if your control circuit is AC, mixed AC/DC, or a wide DC window, and you want the simplest possible position feedback: a two-wire contact in series with the load. It is the general-type CMS - if the location is hot, step up to the -H variant. For a DC PLC input where bounce and contact wear matter, an electronic DMS or EMS is the better match. The 3 m lead suits control boxes mounted a short run from the cylinder; longer runs use the 5 m or 10 m versions or a connector type. Match the G profile to the cylinder groove, and confirm the piston magnet is fitted.
Quick checklist
- ✓ Cylinder has a piston magnet
- ✓ Profile letter fits your cylinder groove
- ✓ Output matches the PLC input (2-wire)
- ✓ Supply rail is 5-240 V AC/DC
- ✓ Lead length or M8 / M12 connector
- ✓ High temperature? Use the -H 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 5-240 V AC/DC.
- check A reed contact suits AC or DC; observe the load limits on the datasheet.
- 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 CMSG Reed Switch Sensor CMSG-030 FAQ
It is a reed position switch with a 2-wire contact output, rated for 5-240 V AC or DC supply with no polarity, IP64 protected, and terminated in a 3 m flying lead. It is the general (non-high-temperature) type of the CMS family.
The CMS reed contact wires in series like a mechanical limit switch, accepts AC or DC across 5-240 V, and draws no standby electronics - ideal for relay panels and mixed-voltage machines. An electronic DMS/EMS switch is DC-only and solid-state, with faster bounce-free cycling for PLC counting. Whichever you choose, the G profile must fit your cylinder's sensor groove and the cylinder must have the built-in magnet.
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