1. Althen Sensors
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  3. Linear position sensors
  4. Intrinsically safe position sensors
  5. H101 Intrinsically safe linear position sensor

H101 Intrinsically safe linear position sensor

Compact and rugged linear sensor for high-accuracy measurements in hazardous environments. Certified for gas and dust atmospheres with a robust stainless-steel design.


Key features

  • Intrinsically safe for gas and dust (Zone 0/20)
  • Custom travel range up to 800 mm
  • Robust stainless steel housing
  • Non-contact inductive measurement principle
  • IP67 rated sealing for harsh environments
  • Infinite resolution and excellent repeatability

Performance highlights

The H101 sensor offers high linearity (±0.25% or ±0.5% FSO) depending on travel range and is factory-calibrated to custom stroke lengths between 5 mm and 800 mm. With infinite resolution, minimal noise, and exceptional temperature stability, it ensures accurate position feedback even in dynamic and demanding applications.

Usage conditions

Designed for Zone 0 and Zone 20 hazardous areas, the H101 complies with CSA, ATEX, and IECEx standards. Operating temperature is rated between -40 °C and +80 °C. The rugged stainless-steel housing, IP67 protection, and EMC shielding make it ideal for heavy industrial environments.

Possible applications

  • Valve position monitoring
  • Hydraulic actuator feedback
  • Drilling and mining equipment
  • Oil & gas exploration systems
  • Chemical processing instrumentation

Advantages of choosing this product

Unlike conventional potentiometric sensors, the H101 uses a non-contacting inductive method to ensure long service life and zero mechanical wear. The customizable push rod design, multiple mounting options, and compatibility with Althen’s G005 galvanic isolator amplifier make integration simple and reliable.

Other important features

  • Calibration matched to specific customer stroke
  • Choice of axial or radial connector/cable exit
  • 3- or 5-wire connection modes
  • Spring-loaded push rod options
  • EMC compliant to EN 61000-6 standards

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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Talk to our experts

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
Measuring range 0–5 mm to 0–800 mm (custom set)
Linearity ≤ ±0.25% (≤450 mm), ≤ ±0.5% (>450 mm)
Output 0.5–4.5 V ratiometric (EX08 electronics)
Resolution Infinite
Frequency response >10 kHz
Sealing IP67 (depending on connection)
Temperature range -40 °C to +80 °C (operation)
Intrinsic safety rating Class I, II, III, Zone 0/20, Division 1
Housing material Stainless steel
Certifications CSA-approved, Ex ia IIC T4 Ga, IIIC T135°C Da
Connection options Cable gland or M12 connector, 3/5-core
Push rod types Free or captive, spring-loaded options

Related products

Need something else?

P101 Stand-alone linear inductive position sensor

  • Travel range up to 800 mm, configured to specification
  • IP65/IP67 environmental protection
  • Compact design with integrated electronics
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H130 Long stroke in-cylinder linear position sensor

  • Intrinsically safe for explosive zones
  • Custom stroke length up to 1485 mm
  • Durable, stainless steel construction
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G005 Galvanic isolation amplifier

  • ATEX & CSA approved
  • Wide 12–30 Vdc supply
  • 4.7 kHz bandwidth
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