1. Althen Sensors
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  3. Linear position sensors
  4. Intrinsically safe position sensors
  5. G103 Short stroke linear position sensor (intrinsically safe)

G103 Short stroke linear position sensor (intrinsically safe)

Compact, short-body inductive position sensor for gas/vapour hazardous areas. Calibrated travel from 2 to 50 mm with stable, linear output for precise OEM integration.


Key features

  • Intrinsically safe for class i zone 0 and c1d1
  • Non-contact inductive design with no wear
  • Custom calibrated travel 2–50 mm
  • Short body with multiple mount options
  • 0.5–4.5 v ratiometric output at 5 v
  • Sealing to ip65 or ip67 as ordered

Performance highlights G103 Linear Inductive Position Sensor

The G103 uses non-contact inductive technology to deliver a linear, repeatable signal across its calibrated stroke. Independent linearity is ≤ ±0.25% fso at 20 °c, with low temperature coefficients for gain and offset. Frequency response exceeds 10 kHz for responsive measurement, while noise remains below 0.02% fso.

Usage conditions

Approved as ex ia iic t4 (class i, zone 0) and class i, division 1 groups a–d for operation between −40 to +80 °c. The sensor achieves ip65 or ip67 sealing depending on cable/connector choice and is tested to 10 g vibration and 40 g shock. Use with a galvanic isolation amplifier; althen recommends the g005 barrier.

Possible applications

  • Valve position feedback in classified areas
  • Short-stroke actuator and cylinder feedback
  • Test rigs and fixtures with limited space
  • Process equipment interlocks and motion checks

Advantages of choosing this product

A compact stainless steel body, short overall length, and flexible mounting—flange, body clamps, or rod-eye—make installation straightforward. Five-wire mode is supported for long cable runs to maintain full accuracy via remote sense with the galvanic isolation amplifier.

Other important features

  • Output: 0.5–4.5 v ratiometric at 5 v supply
  • Calibrated travel: 2–50 mm in 1 mm steps
  • Options: sprung plunger, dome end, magnetic tip, m5 rod-eye
  • Cable/connector choices incl. din 43650 c and m12 iec 61076-2-101
  • Gain/offset trim available on axial versions

Do you need this sensor for your next project?

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Technical Specifications

Specification Value
Calibrated travel 2 to 50 mm (factory set)
Independent linearity ≤ ±0.25% fso @ 20 °c
Temperature coefficients < ±0.01%/°c gain, < ±0.01% fso/°c offset
Frequency response > 10 kHz (−3 dB)
Resolution Infinite
Noise < 0.02% fso
Output 0.5–4.5 v (ratiometric with supply)
Supply voltage +5 v (4.5–5.5 v)
Supply current 10 mA nominal, 12 mA max
Intrinsic safety class i, zone 0 ex ia iic t4 ga / aex ia iic t4 ga; class i, division 1 groups a, b, c, d; t4 (ta −40 to +80 °c)
Operating temperature −40 to +80 °c
Storage temperature −40 to +125 °c
Sealing IP65 or IP67 (per cable/connector)
EMC EN 61000-6-2, EN 61000-6-3
Vibration IEC 68-2-6: 10 g
Shock IEC 68-2-29: 40 g
MTBF 350,000 h @ 40 °c gf
Body material Stainless steel
Plunger Stainless steel, Ø6 mm
Standard lengths (examples) Axial 65–105 mm; flange 83.5–123.5 mm depending on stroke 

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