1. Althen Sensors
  2. Sensors
  3. Linear position sensors
  4. Intrinsically safe position sensors
  5. X118 Short stroke slim-line linear position sensor

X118 Short stroke slim-line linear position sensor

Compact, high-accuracy linear sensor designed for short stroke measurements in hazardous gas or vapor environments.


Key features

  • Intrinsically safe: Ex II 1G for gas/vapour
  • Compact 19 mm diameter stainless steel body
  • Non-contacting inductive technology
  • Calibrated stroke from 2 to 50 mm
  • Infinite resolution, low noise < 0.02% FSO
  • Environmental sealing up to IP67

Performance highlights

The X118 delivers precise, repeatable linear position measurements in environments where intrinsic safety is critical. With a compact 19 mm housing and non-contact inductive technology, the sensor offers high durability, infinite resolution, and linearity better than ±0.25% FSO at 20°C.

Usage conditions

  • Operating temperature: -40°C to +80°C
  • Certified for use in hazardous zones (ATEX / IECEx / UKEX)
  • EMC performance per EN 61000-6-2 / 6-3
  • Designed for use with Althen’s X005 galvanic isolation amplifier for optimal performance

Possible applications

  • Pneumatic and hydraulic cylinder position feedback
  • OEM machine integration in hazardous areas
  • Short stroke position sensing in chemical or oil & gas industries
  • Valve and actuator monitoring systems
  • Research test benches for high-accuracy short displacement measurement

Advantages of choosing this product

This sensor is ideal when compact design, safety compliance, and high-performance feedback are essential. It's factory calibrated for custom travel lengths, includes EMC protection, and can be combined with Althen’s signal conditioning for turnkey integration.

Other important features

  • Flange, rod-eye, or clamp mounting options
  • Plunger with M4/M5 thread, magnetic tip, or spring load
  • Three or five-wire mode for long cable runs (up to 1000m)
  • Ratiometric analog output: 0.5 - 4.5 V

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.

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Technical Specifications

Specification Value
Sensor type Linear, non-contact inductive
Output 0.5 – 4.5V ratiometric with 5V supply
Linearity ≤ ±0.25% FSO @ 20°C (optional: ±0.1%)
Resolution Infinite
Operating temperature -40°C to +80°C
Storage temperature -40°C to +125°C
Frequency response >10 kHz
Noise < 0.02% FSO
Body diameter 19 mm
Stroke length 2 mm to 50 mm
Intrinsic safety Ex II 1G, Ex ia IIC T4 Ga
Protection rating IP67
Cable length max. Up to 1000 m (5-wire mode recommended)
Mounting options Flange, rod-eye, body clamp
Plunger options Free/captive, threaded, spring-loaded, magnetic
Power supply +5V (4.5 - 5.5V), 10-12 mA

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X101 Stand-Alone Linear Position Sensor

  • Intrinsically safe for Zone 0 use
  • Stroke range from 5 mm to 800 mm
  • IP65/IP67 sealed stainless steel housing
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X114 Submersible stand-alone linear position sensor

  • Intrinsically safe design
  • Sealed to IP68/IP69K
  • Travel up to 800 mm
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X005 Galvanic Isolation Amplifier

  • ATEX and IECEx certified
  • 0.5–9.5V or 4–20mA output
  • 4.7kHz bandwidth for dynamic signals
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