M138 Mid stroke Slim-Line linear position sensor
Compact linear sensor with intrinsically safe electronics for use in mining and hazardous industrial zones.
Key features
- Intrinsically safe for mining (Ex I/II M1/1GD)
- Compact 19 mm stainless steel body
- High accuracy and linearity (≤±0.25% FSO)
- IP67 environmental sealing
- Custom stroke from 51 mm to 100 mm
- Fully EMC compliant
Performance highlights M138 Linear Inductive Position Sensor
The M138 linear position sensor offers excellent linearity and repeatability with a slim body design (Ø19 mm). It delivers a linear analog output (0.5–4.5V) proportional to stroke length and is built for robust, reliable measurement in hazardous zones, especially mining.
Usage conditions
Certified for ATEX, IECEx, and UKEX (Ex ia IIC T4 Ga and Ex ia IIIC T135°C Da), the M138 operates safely in explosive gas and dust environments. It withstands temperatures from -40°C to +80°C and offers full EMC compliance.
Possible applications
- Mining equipment position monitoring
- Actuator or cylinder stroke feedback
- Hazardous industrial automation
- Oil & gas refinery machinery
- Underground tunneling systems
Advantages of choosing this product
The M138 is tailored to OEM requirements, allowing for custom stroke lengths between 51 mm and 100 mm. Its non-contact inductive technology ensures long life with minimal wear. The sensor includes multiple connector and mounting options for seamless integration.
Other important features
- Frequency response >10 kHz
- Resolution: Infinite
- Vibration/shock rated (10g / 40g)
- Optional magnetic tip, rod-eye, or dome end
- Pre-wired or connector variants
- 3-core or 5-core cable for flexible wiring setups
Do you need this sensor for your next project?
Request a no-obligation quote or send us your contact details for a free, no-obligation consultation. Our sales engineers will then contact you within a maximum of 1 to 2 working days.
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Not exactly what you are looking for? We offer standard sensors, but can also help you with sensors adapted for you or a fully customised measurement solution. Contact us for advice or pricing.
Talk to an expertTechnical Specifications
| Specification | Value |
|---|---|
| Stroke range | 51 mm to 100 mm (custom set) |
| Linearity | ≤ ±0.25% FSO @ 20°C |
| Temperature coefficient (gain/offset) | < ±0.01%/°C |
| Frequency response | > 10 kHz (-3dB) |
| Resolution | Infinite |
| EMC compliance | EN 61000-6-2, EN 61000-6-3 |
| Shock/Vibration resistance | 40g / 10g |
| Operating temperature | -40°C to +80°C |
| Storage temperature | -40°C to +125°C |
| Sealing | IP67 |
| Housing diameter | 19 mm stainless steel |
| Output signal | 0.5–4.5V ratiometric (EX07 electronics) |
| Input voltage | +5V (4.5 – 5.5V) |
| Intrinsic safety approvals | ATEX / IECEx / UKEX |
| Connector options | M8 axial/radial, cable gland options |
| Cable options | Pre-wired 3-core or 5-core (up to 150m) |
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