G138 Mid-Stroke Slim-Line Linear Position Sensor
EX-certified, compact linear sensor for hazardous gas and vapour zones.
Key features
- Certified for Class I, Zone 0 / Division 1 (EX ia)
- Compact 19 mm stainless steel housing
- Inductive, non-contact technology (wear-free)
- Calibrated stroke from 51 to 100 mm
- 0.5–4.5 V ratiometric output (EX08 electronics)
- Environmental protection up to IP67
- Multiple mounting and plunger options
Performance highlights
The G138 is an intrinsically safe, mid-stroke linear position sensor developed for hazardous gas and vapour zones (e.g. Zone 0 / Div 1). With a slim 19 mm stainless steel body, this sensor is ideal for tight-space applications requiring precise displacement feedback between 51 and 100 mm. It is powered by EX08 electronics and delivers a ratiometric analogue output (0.5–4.5 V) calibrated to customer-defined stroke length.
Usage conditions
Designed for harsh industrial environments, the G138 offers wear-free inductive measurement, high linearity (≤ ±0.25% FSO), and full EMC compliance (EN 61000-6-2 / -6-3). The unit operates in a wide temperature range (-40°C to +80°C), is sealed to IP67, and is rated for shock (40 g) and vibration (10 g).
Applications:
- Valve feedback in ATEX-certified plants
- Intrinsically safe motion tracking in automation
- Test equipment in petrochemical industry
- Compact EX-rated actuator control
- OEM machinery in explosive zones
Why choose the G138?
The sensor provides outstanding mechanical flexibility, with options such as:
- Spring-loaded plungers with dome end
- Captive or free plungers
- Magnetic tips or M5 rod eye fittings
- Mounting via body clamps or stainless steel flange
Available with axial or radial cable glands or connectors, the G138 is custom-configurable to meet OEM integration needs.
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 |
|---|---|
| Calibrated stroke | 51–100 mm (custom-defined) |
| Linearity | ≤ ±0.25% FSO (@ 20°C), optional ≤ ±0.1% |
| Output signal | 0.5–4.5 V ratiometric (EX08) |
| Resolution | Infinite |
| Frequency response | >10 kHz (-3 dB) |
| Noise | <0.02% FSO |
| Supply voltage | 5 V (4.5–5.5 V), 10 mA nominal |
| Load resistance | ≥5 kΩ |
| EMC compliance | EN 61000-6-2 / -6-3 |
| Operating temperature | -40°C to +80°C |
| Storage temperature | -40°C to +125°C |
| Shock resistance | 40 g (IEC 68-2-29) |
| Vibration | 10 g (IEC 68-2-6) |
| Intrinsic safety classification | Class I, Zone 0, Div 1, EX ia IIC T4 Ga |
| Sealing | IP67 |
| MTBF | 350,000 hrs @ 40°C |
| Housing material | Stainless steel (316) |
| Mounting | Body clamps or flange with 25 mm PCD |
| Plunger options | M4 thread, M5 rod eye, dome tip, spring, magnetic tip |
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