Airtac CMSH Reed Sensor CMSH-030
The AirTAC Airtac CMSH Reed Sensor CMSH-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)H
- Lead / connector3 m flying lead
- VersionStandard
- RequiresMagnet-equipped cylinder
About the Airtac CMSH Reed Sensor CMSH-030
The CMSH-030 is a reed-type magnetic position switch from AirTAC. Inside sits a sealed mechanical reed contact, not solid-state electronics, so it closes on either AC or DC anywhere from 5-240 V and needs no polarity. It seats in the sensor groove of an AirTAC cylinder fitted with the piston magnet option and signals position through its 2-wire circuit. This version carries a 3 m flying lead; the general-type body is sealed to IP64.
Because the contact is mechanical, it behaves like a classic limit switch: wire it in series with the load, expect a finite contact life under very heavy cycling, and mind inrush loads on the line. The H profile letter sets the groove fit for the cylinder body, so check it against your series before ordering - exact seating is what makes or breaks detection.
Airtac CMSH Reed Sensor CMSH-030 Technical Specifications
| Model | Airtac CMSH Reed Sensor CMSH-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 | 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-030
| 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. |
| 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 | 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-030 Is Used
Relay panel end-of-stroke
A packaging machine's clamp cylinder signals full close to a 24 V DC relay rung; the 2-wire reed contact drops straight into the series path.
Assembly fixture clamp check
On a bench fixture, an AirTAC clamp cylinder with the magnet option proves the part is gripped before the press cycle may start.
Three-point slide detection
Three switches seated at home, mid and end positions on one slide cylinder each report over their own 3 m leads back to the terminal strip.
Is the Airtac CMSH Reed Sensor CMSH-030 the Right Switch?
Choose CMSH when your control circuit wants a simple series contact on AC or DC; pick a DMS or EMS electronic switch instead if cycles are fast and you want solid-state switching with no bounce. This 3 m flying lead suits fixed mounts where the cable never moves; for plug-in service swaps, ask about an M8 or M12 connector build. The -H build handles hot zones, while this general type suits ordinary ambient. Either way, the H profile must match your cylinder's groove and the piston must carry the built-in magnet.
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-030 FAQ
It is a reed position switch with a 2-wire mechanical contact. Supply range is 5-240 V AC or DC, protection is IP64, and it arrives with a 3 m flying lead. There is no polarity to observe and no output transistor, since the element is a sealed reed.
Pick the reed CMSH when your circuit wants a simple series contact on AC or DC and you value galvanic isolation. Choose an electronic DMS or EMS when switching is very frequent and you need solid-state operation without contact bounce. Remember the profile letter must seat in your cylinder's groove and the piston needs the built-in magnet.
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