MR430 System Series

MR430 Series

Fiber Optic Absolute Rotary Position Sensor System

The MR430 series ZapFREE® Fiber Optic Position Sensor is a small form factor, rotary position sensor with 13-bit, single-turn resolution.
The MR430 features an innovative design which enables new applications and OEM product features not formerly possible with electronics-based sensors.
The sensor is 100% passive and is unaffected by EMI, RFI, microwaves and magnetic fields. The innovative, all dielectric design also provides 100% electrical isolation and immunity to high voltages & lightning. Features include:

  • 100% passive optical sensor – no power supply required
  • Size 11 (Ø1.1”) small form factor
  • Single turn resolution 0.044°
  • Up to 25-bit output (13 bits Single Turn + 12 bits Multi-Turn)
  • Immune to EMI, RFI, high voltage and lightning
  • Immune and invisible to magnetic fields
  • Non-metallic, all-dielectric MRI Safe sensor
  • M-POF fiber optic link can extend up to 30 meters
  • DIN rail mount controller


  • Medical and MRI
  • Transformer tap changer
  • Switchgear
  • Oil & Gas
  • Transportation
  • Semiconductor equipment
  • Welding
  • Robotic

The MR430 Fiber Optic Position Sensor measures absolute angular position from 0° to 360° with 13 bit resolution and multiturn tracking up to 12 bits (4096 turns). The system can operate at full accuracy at speeds up to 2200 rpm and distances up to 30 meters. This sensor system uses a novel optical spectral imprint technique.