Airtac CMSH Reed Sensor CMSH-C08
The AirTAC Airtac CMSH Reed Sensor CMSH-C08 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. 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)H
- Lead / connectorSee datasheet
- VersionStandard
- RequiresMagnet-equipped cylinder
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac CMSH Reed Sensor CMSH-C08
AirTAC's CMSH-C08 is a reed position switch from the CMS line. It detects the magnet in a magnet-equipped AirTAC cylinder piston and closes a 2-wire contact at the set position. The C08 token in the wiring position is a factory connection code; we will confirm its meaning from the datasheet. The supply window is 5-240 V AC/DC and the standard housing is IP64.
A reed switch is a mechanical contact, not solid-state: it ignores polarity and runs straight on AC or DC. The H profile letter is a groove-fit code, not a grade, and it has to match the sensor groove of your cylinder - send us the cylinder series and we will verify the seating.
Airtac CMSH Reed Sensor CMSH-C08 Technical Specifications
| Model | Airtac CMSH Reed Sensor CMSH-C08 |
|---|---|
| Family | CMS — Reed switch cylinder sensor |
| Technology | Reed (magnetic contact) |
| Output | 2-wire |
| Outputs in this family | 2-wire contact |
| Lead / connector | See datasheet |
| Supply voltage | 5-240 V AC/DC |
|---|---|
| Protection rating | IP64 |
| Version | Standard version |
| Profile letter | H (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 CMSH Reed Sensor CMSH-C08
| CMS | Reed switch cylinder sensor — reed (magnetic contact). |
|---|---|
| H | 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. |
| 08 | 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. 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 | CMSH · 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 CMSH Reed Sensor CMSH-C08 Is Used
Retrofit panel
Adding end-of-stroke signals to an older machine? A reed contact drops into existing 230 V AC relay circuits without a power supply or interface card.
Maintenance swap
Technicians replacing failed switches on a packaging machine keep one reed type in the drawer because it covers both AC and DC control circuits.
High-bay lifter
Vertical lift cylinders on an AS/RS shuttle confirm home and top positions to a relay logic panel.
Is the Airtac CMSH Reed Sensor CMSH-C08 the Right Switch?
The CMSH-C08 keeps the classic reed formula - 2-wire, wide 5-240 V AC/DC supply, series wiring like a limit switch - while the C08 connection code marks a factory variant we will verify against the datasheet. If you would rather have a defined flying lead or an M8/M12 connector, the numbered wiring codes (020-100, M08*, M12*) spell those out. Remember the cylinder needs the built-in magnet, and the H profile has to seat correctly in its 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 CMSH Reed Sensor CMSH-C08 FAQ
Reed (CMS) type, 2-wire output, 5-240 V AC/DC supply, IP64 housing. The C08 connection code is a factory variant - request the datasheet and we will confirm its exact detail.
A reed contact has no polarity and no NPN/PNP choice, so it fits AC and DC circuits alike and wires in series like a mechanical limit switch. Solid-state DMS switches in 3-wire NPN or PNP form are the better match for a dedicated PLC input - but they are DC only. Both families need a magnet-fitted cylinder.
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Standard models are processed and dispatched in 3-5 business days.
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Related AirTAC Cylinder Sensors
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Send us the quantity, your cylinder model (so we can confirm the profile fit) and the destination. We confirm price, availability and lead time — usually within 7-8 hours.