Airtac DMSH Electronic Sensor DMSH-N020-W
The AirTAC Airtac DMSH Electronic Sensor DMSH-N020-W is a genuine DMS magnetic position switch. It senses the magnet ring in a pneumatic cylinder's piston and signals when the piston reaches that point, giving a npn 3-wire output on 5-30 V DC with a 2 m flying lead. It only works on a cylinder that carries a piston magnet.
- TechnologyElectronic (solid-state)
- OutputNPN 3-wire
- Supply voltage5-30 V DC
- ProtectionIP64
- Profile (groove fit)H
- Lead / connector2 m flying lead
- VersionW
- 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 DMSH Electronic Sensor DMSH-N020-W
The DMSH-N020-W is AirTAC's DMS electronic switch in an NPN 3-wire, 2 m flying-lead format, reading the piston magnet of a magnet-equipped AirTAC cylinder. The trailing -W is a special suffix that is not documented in our data; we will confirm what it specifies from the datasheet on request, so treat the housing as the general IP64 type unless told otherwise. Supply voltage is 5-30 V DC and the H profile sets the groove fit.
Do not assume -W equals -RW: only -RW is the documented waterproof, oil-resistant, flex-resistant build that lifts protection to IP68. What is certain here is the switching behaviour - a solid-state NPN output with no contact bounce, sinking current into a PLC input. Series-connection leakage does not apply, since the three wires separate supply from signal. Confirm switching current and sensing distance from the datasheet, and check the H profile against your cylinder's groove.
Airtac DMSH Electronic Sensor DMSH-N020-W Technical Specifications
| Model | Airtac DMSH Electronic Sensor DMSH-N020-W |
|---|---|
| Family | DMS — Electronic cylinder switch |
| Technology | Electronic (solid-state) |
| Output | NPN 3-wire |
| Outputs in this family | 2-wire, NPN 3-wire or PNP 3-wire |
| Lead / connector | 2 m flying lead |
| Supply voltage | 5-30 V DC |
|---|---|
| Protection rating | IP64 |
| Version | W - factory special code, confirm from datasheet |
| Profile letter | H (cylinder-groove fit) |
| Profiles in this family | E, G, H, J |
| Detects | Piston magnet ring inside the cylinder |
2-wire versions run 10-28 V DC; NPN / PNP 3-wire versions run 5-30 V DC. IP64 as standard. Order the RW version where coolant, washdown or constant cable flexing is present. 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 DMSH Electronic Sensor DMSH-N020-W
| DMS | Electronic cylinder switch — electronic (solid-state). |
|---|---|
| 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. |
| N | Output: NPN 3-wire. Blank is 2-wire, N is NPN 3-wire, P is PNP 3-wire. |
| 020 | 2 m flying lead. 020 / 030 / 050 / 100 are 2 / 3 / 5 / 10 m flying leads; M08 and M12 are M8 / M12 connector versions. |
| W | W - factory special code, confirm from datasheet. |
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 | DMSH · NPN 3-wire · 5-30 V DC |
|---|---|
| Consider EMS | the mini 2-wire electronic switch for tight installations |
| Consider CMS | the reed alternative for AC circuits and voltages up to 240 V |
| Mounting parts | F-MQ (round body), F-ACT (tie-rod) |
Where the Airtac DMSH Electronic Sensor DMSH-N020-W Is Used
Test-rig actuator feedback
On a pneumatic test bench, the NPN output feeds a data-logging PLC while the -W special build is verified against the bench's environment spec.
Maintenance-cart lift position
Mounted on the mast cylinder of a workshop service cart, with the 2 m lead trimmed to reach the local control box.
Fastener-feed fixture sensing
Confirms the push cylinder of a bolt-feeding fixture has advanced, using a dedicated 3-wire signal to the station PLC.
Is the Airtac DMSH Electronic Sensor DMSH-N020-W the Right Switch?
Specify this switch for a DC control system with a sinking input; the N code fixes NPN polarity, and the P variant suits sourcing cards. The 2 m lead can be trimmed in place, while M8 and M12 connectors suit machines that need frequent disconnection. If the duty is washdown or a moving cable track, ask whether the -RW version (IP68) is the right special rather than this undetermined -W. As always, the profile letter must seat in the cylinder groove, and the cylinder needs its magnet option fitted.
Quick checklist
- ✓ Cylinder has a piston magnet
- ✓ Profile letter fits your cylinder groove
- ✓ Output matches the PLC input (NPN 3-wire)
- ✓ Supply rail is 5-30 V DC
- ✓ Lead length or M8 / M12 connector
- ✓ Coolant or flexing? Use the RW 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 5-30 V DC.
- check Wire npn 3-wire to match the PLC input's polarity.
- 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 DMSH Electronic Sensor DMSH-N020-W FAQ
It is an electronic (solid-state) switch with an NPN 3-wire output, a 5-30 V DC supply, a 2 m flying lead and IP64 protection in the general type. The -W suffix itself is an undocumented special code; we confirm its meaning from the datasheet.
No - that is not established. Only the -RW code is the documented waterproof, oil-resistant and flex-resistant build, rated IP68. For this -W model the housing stays at the general IP64 rating until the datasheet confirms what the suffix adds. Ask us for that confirmation before specifying it into a wet or washdown zone.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Cylinder Sensors
Request a Quote for Airtac DMSH Electronic Sensor DMSH-N020-W
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.