Airtac CMSG Reed Switch Sensor CMSG-050
The AirTAC Airtac CMSG Reed Switch Sensor CMSG-050 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 5 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 / connector5 m flying lead
- VersionStandard
- RequiresMagnet-equipped cylinder
About the Airtac CMSG Reed Switch Sensor CMSG-050
The CMSG-050 is AirTAC's general-type reed position switch with an extended 5 m flying lead. A mechanical reed contact inside the housing reacts to the piston magnet of a magnet-equipped AirTAC cylinder and closes a 2-wire circuit - a dry-contact style signal that any control system understands. It operates from 5-240 V AC or DC, needs no polarity, carries an IP64 rating, and the extra lead length lets you mount the panel farther from the machine without splicing cable.
That 5 m reach is genuinely useful on large frames: gantries, long conveyors and presses often place their electrical enclosure well away from the cylinders, and the longer lead avoids joints that could work loose under vibration. The reed contact suits this too, since it neither leaks current nor needs a polarized hookup. The G profile is purely the groove-fit code - match it to your cylinder series - and the cylinder must be specified with the built-in magnet for any signal at all.
Airtac CMSG Reed Switch Sensor CMSG-050 Technical Specifications
| Model | Airtac CMSG Reed Switch Sensor CMSG-050 |
|---|---|
| Family | CMS — Reed switch cylinder sensor |
| Technology | Reed (magnetic contact) |
| Output | 2-wire |
| Outputs in this family | 2-wire contact |
| Lead / connector | 5 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-050
| 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. |
| 050 | 5 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-050 Is Used
Palletizer clamp arms
Verifies clamp-arm closure on a robotic palletizer, the 5 m lead running from the gripper cylinders up to the cell controller without intermediate joints.
Long transfer-car cylinders
Monitors push cylinders on a transfer car crossing a warehouse aisle, where the enclosure sits metres away and a splice-free lead keeps vibration out of the circuit.
Stamping-feed lifters
Signals sheet-lift position on a mechanical stamping feed line, the reed contact dropping straight into the press's 110 V AC control chain.
Is the Airtac CMSG Reed Switch Sensor CMSG-050 the Right Switch?
Reach for CMSG-050 when the control panel sits a few metres from the cylinder and you want a continuous, splice-free run: same 2-wire reed output and 5-240 V AC/DC window as the shorter CMSG-030, just a longer lead. Need 10 m? That version exists too, or step to M8/M12 connector types on other CMS codes where unplugging for service matters more than a fixed run. Stay with CMS for AC circuits and relay logic; move to an electronic DMS/EMS for DC PLC inputs needing bounce-free feedback. General type only - for hot zones pick the -H build - and confirm the G profile fits your cylinder groove.
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-050 FAQ
It is a reed (magnetic reed) position switch with a 2-wire contact output, working supply of 5-240 V AC or DC with no polarity, IP64 housing protection, and a 5 m flying lead as standard. It is the general CMS type, not the high-temperature H variant.
No - it is a specification choice. The extra length lets the switch reach a control cabinet mounted away from the machine without splicing, which keeps a single continuous cable in vibrating or wet areas. Other CMS codes offer 2 m, 3 m, 10 m or M8/M12 connector options; pick by installation, not availability. Whichever you choose, confirm the G profile matches your cylinder groove and that the cylinder has the piston magnet option.
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