1. Althen Sensors
  2. Sensors
  3. Rotary position sensors
  4. Intrinsically safe inductive rotary sensors
  5. H500 Intrinsically safe rotary position sensor

H500 Intrinsically safe rotary position sensor

Compact, high-accuracy rotary sensor for hazardous gas and dust environments. Ideal for OEMs requiring long-life, non-contact angular measurement solutions.


Key features

  • Certified for Zone 0 and 20 hazardous areas
  • Non-contact inductive measurement technology
  • Factory-set angle calibration from 16° to 160°
  • High linearity up to ±0.25% FSO
  • IP67-rated rugged stainless steel housing
  • CSA and ATEX intrinsically safe compliance

Performance highlights

The H500 rotary sensor delivers highly accurate, non-contact angular measurements in safety-critical industrial applications. With independent linearity of ≤±0.25% FSO and infinite resolution, it ensures stable and repeatable feedback over a wide temperature range.

Usage conditions

Designed for harsh environments, the H500 is sealed to IP67, operates from -40°C to +80°C, and is certified for explosive dust and gas atmospheres (Zone 0 / Zone 20). The device is ideal for OEM and industrial integration with optional cable or connector configurations and 360° shaft rotation.

Possible applications

  • Valve and actuator position monitoring
  • Industrial feedback systems in hazardous zones
  • Offshore and petrochemical equipment
  • Mobile machinery and automation systems
  • Scientific instrumentation requiring compact sensors

Advantages of choosing this product

Choosing the H500 means benefiting from Althen’s extensive expertise in hazardous area sensing, ensuring operational safety, excellent durability, and plug-and-play integration. The product is factory calibrated to customer-specific angles, and optional galvanic isolation amplifiers ensure safe signal transmission.

Other important features

  • Low torque: <20 mNm static
  • Signal output: 0.5–4.5 V ratiometric
  • EMC performance: EN 61000-6-2, EN 61000-6-3
  • Vibration/shock resistance: 10 g / 40 g
  • Custom mounting options: flange or servo

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
Independent linearity ≤ ±0.25% FSO @ 20°C (up to 100°)
Operating temperature -40°C to +80°C
Storage temperature -40°C to +125°C
Frequency response >10 kHz (-3 dB)
Resolution Infinite
Noise <0.02% FSO
Torque <20 mNm static
Output 0.5 – 4.5V ratiometric with supply
Supply voltage +5V (4.5 – 5.5V)
Current consumption 10 mA nominal, 12 mA max
Environmental sealing IP67 (depending on connector/cable)
Intrinsic safety certifications CSA Class I, Div 1 & Class II, Div 1
Mounting options Flange / Servo
Cable length max 15 m

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