Airtac CMSJ Reed-type Sensor CMSJ-030-H
The AirTAC Airtac CMSJ Reed-type Sensor CMSJ-030-H 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)J
- Lead / connector3 m flying lead
- VersionH
- 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 CMSJ Reed-type Sensor CMSJ-030-H
The CMSJ-030-H combines AirTAC's CMS reed switch family with the H high-temperature option. At its core is a mechanical magnetic reed contact that closes when the piston magnet of a magnet-equipped AirTAC cylinder arrives. It is a 2-wire, polarity-free device spanning 5-240 V AC or DC, rated IP64 as a body, and shipped with a 3 m flying lead for direct runs to a terminal strip.
Heat is the reason to pick the -H over the plain CMSJ-030: the construction is upgraded for hot surroundings such as drying tunnels or presses, with the exact temperature limit listed in the datasheet. Compared with an electronic switch, the reed contact needs no supply of its own and tolerates either current type, but its mechanical life is finite and it can bounce at closure. The J profile governs how the body seats in the cylinder's sensor groove, so confirm the fit against your cylinder series before you order.
Airtac CMSJ Reed-type Sensor CMSJ-030-H Technical Specifications
| Model | Airtac CMSJ Reed-type Sensor CMSJ-030-H |
|---|---|
| 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 | High-temperature version |
| Profile letter | J (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 CMSJ Reed-type Sensor CMSJ-030-H
| CMS | Reed switch cylinder sensor — reed (magnetic contact). |
|---|---|
| J | 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. |
| H | High-temperature 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 | CMSJ · 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 CMSJ Reed-type Sensor CMSJ-030-H Is Used
Drying tunnel gate
Gate-open detection on a cylinder mounted inside a paint drying tunnel, where the H build tolerates the heated air and the 3 m lead exits to a cooler terminal box.
Steam-jacketed press
Ram position signal on a steam-heated forming press; the polarity-free reed contact ties straight into the plant's 110 V AC control loop.
Injection mold vent
Vent-stroke confirmation near a hot injection mold surface, using the reed contact to trigger the next step in the machine's sequence logic.
Is the Airtac CMSJ Reed-type Sensor CMSJ-030-H the Right Switch?
This is the pick for a reed circuit that also has to live with heat. Keep the family logic in mind: CMS reed for AC/DC flexibility and passive wiring, DMS electronic for fast, bounce-free DC cycling. If your ambient is normal, the standard CMSJ-030 costs less; if the cable run grows past 3 m, look at the CMSJ-050 or a connector version. The J profile has to match the groove on your cylinder, the cylinder must carry the magnet option, and hot-zone temperature limits should be checked on the datasheet.
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 CMSJ Reed-type Sensor CMSJ-030-H FAQ
It is a CMS high-temperature reed switch: mechanical 2-wire contact, 5-240 V AC or DC supply with no polarity, IP64 general protection, and a 3 m flying lead. The H code denotes the high-temperature version; confirm its rated ambient on the datasheet.
A reed contact like this one is passive, works on AC or DC, and needs no polarity, but has a limited mechanical life and can bounce. A DMS electronic switch is solid-state, DC-only, and better for rapid cycling. The H high-temperature option exists only in the CMS family.
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Related AirTAC Cylinder Sensors
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