1. Althen Sensors
  2. Sensors
  3. Linear position sensors
  4. Intrinsically safe position sensors
  5. E115 Rugged submersible stand-alone linear position sensor

E115 Rugged submersible stand-alone linear position sensor

Reliable analog position measurement in harsh submerged environments. Designed for precision, durability, and safe operation in hazardous zones.


Key features

  • Intrinsically safe for gas and dust (Ex II 1GD)
  • Sealing to IP68 10bar / IP69K
  • Travel set to customer’s requirement
  • High accuracy and long-term stability
  • Durable 316 stainless steel construction
  • Up to 800 mm calibrated travel

Performance highlights E115 Rugged submersible linear position sensor

The E115 is a heavy-duty, intrinsically safe linear position sensor built for reliable operation in submerged and hazardous environments. With ratiometric 0.5–4.5V output, infinite resolution, and a high frequency response of >10kHz, it delivers stable, accurate measurement from 5 to 800 mm. Temperature stability is ensured with a gain coefficient of <±0.01%/°C.

Usage conditions

This sensor is certified for gas and dust atmospheres up to Ex II 1GD and operates in temperatures from -40°C to +80°C. It features rugged 316 stainless steel construction and is sealed to IP68 (10 bar) and IP69K, allowing continuous submersion at up to 100 meters.

Possible applications

  • Offshore and subsea equipment
  • Chemical and process industries
  • Submersible hydraulic systems
  • Oil & gas hazardous zone systems
  • Water level or displacement monitoring

Advantages of choosing this linear position sensor

  • High resistance to environmental stress and mechanical vibration
  • Captive or non-captive push rod with multiple tip options
  • Compatible with Althen’s X005 galvanic isolation amplifier
  • Flexible electrical connections with three- or five-wire setup

Other important features

  • Resolution: Infinite
  • Frequency response: >10 kHz
  • EMC compliant (EN 61000-6-2 / 6-3)
  • ATEX / IECEx / UKEX approved
  • Available with dome end, magnetic tip or rod eye

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
Body diameter 35 mm
Body length (axial) Calibrated travel + 168 mm
Body length (radial) Calibrated travel + 189 mm
Push rod extension Calibrated travel + 7 mm, OD 12.6 mm
Independent linearity ≤ ±0.25% FSO @ 20°C (≤450 mm), ≤ ±0.5% FSO (>450 mm)
Temperature coefficients < ±0.01%/°C gain & < ±0.01%FS/°C offset
Frequency response > 10 kHz (-3 dB)
Resolution Infinite
Noise < 0.02% FSO
Intrinsic safety Ex II 1GD, Ex ia IIC T4 Ga, Ex ia IIIC T135°C Da
Operating temperature -40°C to +80°C
Storage temperature -40°C to +125°C
Sealing IP68 10bar / IP69K
Supply voltage +5V (4.5–5.5V)
Output 0.5–4.5V ratiometric
Load resistance ≥5 kΩ
MTBF 350,000 hrs @ 40°C
Vibration IEC 68-2-6: 10 g
Shock IEC 68-2-29: 40 g

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