1. Althen Sensors
  2. Sensors
  3. Linear position sensors
  4. Linear inductive postion sensors
  5. S115 Rugged submersible stand-alone linear position sensor

S115 Rugged submersible stand-alone linear position sensor

Heavy-duty position sensor for submerged use with customizable stroke lengths, high accuracy, and robust stainless steel design.


Key features

  • Custom stroke range from 5 to 800 mm
  • IP68 10bar / IP69K sealing for submersion
  • 316 stainless steel body and push rod
  • Infinite resolution and high EMC protection
  • Multiple output options including 4–20 mA
  • Vibration and shock resistant for harsh environments

Performance highlights S115 Submersible linear inductive position sensor

The S115 is a rugged, compact linear position sensor engineered for demanding submerged applications. It offers exceptional accuracy, repeatability, and stability across a wide temperature range. Using Althen's non-contacting inductive technology, the S115 ensures minimal wear and a long operational life.

Usage conditions

Designed for use in submerged and high-vibration environments, the sensor features a corrosion-resistant stainless steel body and push rod. Its environmental sealing meets IP68 (10 bar) and IP69K standards, making it ideal for continuous underwater use up to 100 meters.

Possible applications

  • Submersible actuator position feedback
  • Marine and offshore systems
  • Scientific research instrumentation
  • Heavy-duty hydraulic control
  • Industrial automation in wet environments

Advantages of choosing this product

Unlike traditional LVDTs, the S115 combines the robustness of inductive technology with a compact form factor and easy integration. It eliminates wear-prone components and provides a wide variety of output signals, rod-end and mounting configurations.

Other important features

  • Configurable displacement: 5 mm to 800 mm
  • Signal options: 0.5–4.5V, ±5V, ±10V, 0.5–9.5V, 4–20 mA
  • Spring-loaded or captive push rod options
  • High frequency response (>10 kHz)
  • Operating temperature: -40°C to +125°C

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
Displacement range 5 mm to 800 mm
Linearity ≤ ±0.25% FSO (≤450 mm); ≤ ±0.5% (>450 mm)
Resolution Infinite
Frequency response >10 kHz (voltage), >300 Hz (current)
Temperature range (operation) -40°C to +125°C
Output options 0.5–4.5V, ±5V, ±10V, 0.5–9.5V, 4–20 mA
Sealing IP68 10 bar / IP69K
Material 316 stainless steel
Vibration resistance IEC 68-2-6: 10g
Shock resistance IEC 68-2-29: 40g
MTBF 350,000 hrs @ 40°C Gf

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