The MR343 series Fiber Optic Linear Incremental Position Sensor is an innovative all-optical, passive design which is immune to any electro-magnetic interferences such as magnetic fields, lightning and high voltages. The sensor’s non-metallic construction makes the sensor entirely MRI safe, being both immune and invisible to magnetic fields.
In operation, the MR343 Linear Position Sensor is optically connected to an MR340 Controller via a duplex multimode fiber optic link. An incremental film strip passes through the optical pick-up and the phase offset of two light beams create the classical A/B quadrature signals accessible via the controller interface.
As an incremental system, the absolute position must be set every time the system is powered up. To automate this process, Micronor has developed a special “homing” zone left or right of the film’s active area. In operation, the mechanical system starts up in the “homing” zone and moves towards the first line in the active area. This corresponds to the reference or index position on a conventional encoder. As the sensor moves into the active area, the counter can correctly track the absolute position.
The system has built-in diagnostics and can signal any anomaly occurring during sensor operation.
| Measurement Parameters | |
| Resolution | 100 μm |
| Maximum Speed | 40m/s (based on 100kHz controller bandwidth) |
| Optical Interface | |
| Connector | LC Duplex |
| Fiber Type | Duplex 62.5/125μm, Graded Index Fiber, 0.27NA, Type OM-1 |
| Maximum Distance | Up to 1600 meters with MR340 series Controller |
| MR Attributes | ACR Guidance Document for Safe MR Practices 2007 |
| MRI Usage Zones | MR343 Sensor is designed for safe use in all MR Zones I-IV |
| Materials Used |
Acetal, ceramic, glass (No ferromagnetic metal or conductive materials are used) NOTE: The LC Duplex optical connector has some small metal parts. The pigtail length shall assure that the connector end is safely secured outside the MRI bore |
| Explosive Atmospheres | |
| EX Classification | Inherently safe, simple mechanical device when used with MR340 Controller |
| ATEX | EPL Mb/Gb/Gc/Db/Dc |
| IEC Ex | EPL Mb/Gb/Gc/Db/Dc |
| Environmental Attributes | |
| Temperature |
Operating: -10°C to +60°C (14°F to +140°F), 0-95% RH, Non-Condensing Storage: -25°C to +70°C (-13°F to +158°F), 0-95% RH, Non-Condensing |
| Ingress Protection | IP30, Keep free from contaminants |
| Physical Attributes | |
| Dimensions | 30 x 28 x 15 mm (1.18 x 1.10 x 0.59 inches) |
| Weight (without cable) | 10 g (0.3 oz), Cable weight ~10g/m |
Specifications subject to change without notice
Call +61 (0) 7 5533 5367 or email info@qualityincontrol.com.au
| MR343-B400YYY | Where YYY=Optical Interface YYY Duplex LC Pigtail Length Options: C1R5=1.5m, C03=3m, C05=5m, C10=10m |
| MR340-1 | DIN Rail Mount Controller |
| MR340-0 | OEM PCB controller |
| MR340-1 | DIN rail mount controller |
| MR343-B400C1R5 | Linear Sensor, Pigtail Length=1.5m |
