1. Althen Sensors
  2. Sensors
  3. Rotary position sensors
  4. Intrinsically safe inductive rotary sensors
  5. X500 Intrinsically safe rotary sensor

X500 Intrinsically safe rotary sensor

Non-contact inductive rotary sensor for accurate position feedback in hazardous gas or vapor environments. Custom angle range and IP65/67 protection.


Key features

  • Intrinsically safe for gas/vapour zones
  • Custom angle range from 16° to 160°
  • Compact and rugged stainless steel housing
  • High resolution and linear output
  • IP65 or IP67 sealing options
  • Certified ATEX / IECEx / UKEX compliant

Performance highlights

The X500 is a compact rotary sensor engineered for intrinsically safe applications. It features non-contact inductive technology, delivering high accuracy and excellent repeatability across a wide temperature range. With a ratiometric analog output (0.5–4.5V), infinite resolution, and linearity of ≤ ±0.25% FSO, this sensor offers reliable performance even in harsh industrial environments.

Usage conditions

Designed for explosive gas/vapor atmospheres, the X500 complies with Ex II 1G Ex ia IIC T4 Ga (–40°C to +80°C). It is suitable for use with galvanic isolation barriers and supports both 3-wire and 5-wire configurations. Protection levels include IP65 or IP67 depending on connector or cable options. Vibration and shock ratings meet IEC standards for rugged use.

Possible applications

  • Valve position feedback in chemical plants
  • Rotary actuator feedback in oil & gas zones
  • Shaft angle measurement in mining operations
  • Position feedback for process automation in hazardous environments
  • Robotics and motion systems in ATEX zones

Advantages of choosing this product

The X500 delivers long service life, low torque, and outstanding stability, eliminating mechanical wear due to its non-contact inductive sensing principle. The angle is factory-calibrated to customer requirements, making it ideal for OEM integration. A full range of connectors and mounting options allows easy integration across various applications.

Other important features

  • Full 360° shaft rotation
  • Low noise: < 0.02% FSO
  • Frequency response > 10kHz
  • Optional spring-loaded shaft
  • EMC compliant to EN 61000-6-2 / -6-3
  • MTBF of 350,000 hrs at 40°C

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Technical Specifications

Specification Value
Body diameter 35mm
Body length (to seal face) 44 mm
Shaft size 6 mm Ø
Independent linearity ≤ ±0.25% FSO @ 20°C (≤100°)
Temperature coefficients < ±0.01%/°C Gain, < ±0.01%FS/°C Offset
Frequency response > 10 kHz (–3dB)
Resolution Infinite
Noise < 0.02% FSO
Torque < 20 mNm
Intrinsic safety Ex II 1G, Ex ia IIC T4 Ga
Operating temperature range –40°C to +80°C
Storage temperature range –40°C to +125°C
EMC performance EN 61000-6-2 / EN 61000-6-3
Sealing IP65 / IP67 (depending on connector)
Vibration 10 g (IEC 68-2-6)
Shock 40 g (IEC 68-2-29)
MTBF 350,000 hrs at 40°C
Output signal 0.5–4.5V ratiometric (5V input)
Load resistance 5 kΩ min

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