1. Althen Sensors
  2. Sensors
  3. Linear position sensors
  4. Intrinsically safe position sensors
  5. H111 Rugged stand-alone linear position sensor

H111 Rugged stand-alone linear position sensor

Explosion-proof linear position sensor with high accuracy and long travel for hazardous gas and dust environments. Designed for durability and precision in industrial feedback systems.


Key features

  • Intrinsically safe for gas and dust zones
  • High durability with stainless steel housing
  • Customizable stroke length from 5 mm to 800 mm
  • IP67 sealing for harsh environments
  • Infinite resolution and high linearity
  • Optional sprung push rod and mechanical fittings

Performance highlights

The H111 rugged linear position sensor offers exceptional accuracy, repeatability, and infinite resolution, making it ideal for industrial and scientific applications. It provides a linear analog output proportional to displacement, with independent linearity of ±0.25% up to 450 mm and ±0.5% up to 800 mm.

Usage conditions

Built to withstand harsh environments, the H111 features full EMC protection, IP67-rated sealing, and a robust stainless steel body and push rod. It operates reliably in a temperature range from -40°C to +80°C and is certified for use in explosive gas and dust atmospheres (Class I, II, III, Zone 0/20, Division 1).

Possible applications

  • Hazardous environments (gas/vapour/dust)
  • Oil & gas and mining equipment
  • Industrial automation systems
  • Valve and actuator position feedback
  • R&D testing and validation setups

Advantages of choosing this product

The H111 offers long-term durability with minimal maintenance due to its non-contacting inductive technology. Its compact design enables space-saving integration, while various mounting and electrical options allow tailored configurations. Every unit is factory-calibrated to the customer’s required travel length.

Other important features

  • Galvanic isolation amplifier compatibility (e.g., G005)
  • 3- or 5-wire connection options for improved accuracy
  • Vibration-resistant design with thick 12.6 mm push rod
  • Multiple output and connection types (M12, cable glands)
  • Spring-loaded options (extend or retract) available up to 300 mm stroke

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
Measurement range 0–5 mm to 0–800 mm
Output signal 0.5–4.5 V ratiometric with supply
Supply voltage +5 V (4.5–5.5 V tolerance)
Linearity ±0.25% FSO (≤450 mm), ±0.5% (>450 mm)
Resolution Infinite
Frequency response >10 kHz (-3dB)
Operating temperature -40°C to +80°C
Storage temperature -40°C to +125°C
EMC compliance EN 61000-6-2, EN 61000-6-3
Sealing IP67
Intrinsic safety CSA certified Class I, II, III; Zone 0, 20
Body material Stainless steel
Push rod diameter 12.6 mm
Mounting options Rod eye, clamps
Connection types M12 connector or cable gland
Cable length Up to 150 m (5-wire recommended >10 m)
Certifications CSA EX ia IIC T4, EX ia IIIC T135°C Da

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