Sercalo FOA MEMS Fiber Optic Accelerometer
Passive MEMS fiber optic accelerometer with a 30 G measurement range, hermetically sealed and insensitive to magnetic and electrical fields.
- Measurement range
- 30 G
- Sensor head size
- 28x6 mm
- Sensing element
- Micromechanical Silicon mirror (MEMS)
- Sealing
- Hermetically sealed
Overview
The Sercalo FOA is a passive opto-mechanical acceleration sensor. Its sensing element is a micromechanical silicon mirror (MEMS) that deflects a light beam in proportion to the applied acceleration. Because the sensor is connected to the measurement electronics only by optical fibers, it can be placed in harsh environments away from the electronics.
Operating principle
The FOA uses an optical system in which light from the input fiber is collimated onto a seismic mirror. The mirror reflects the light into the output fiber with an optical power proportional to the acceleration. Directional acceleration is detected by applying DC offsets on the output.
Construction
The sensor head measures 28x6 mm and is hermetically sealed, which suits vibration sensing in harsh environments. It is offered in a stainless steel package or a MACOR insulating package, with axial or radial sensing direction and multimode fiber pigtails.
Key Features
- 30 G measurement range
- Insensitive to magnetic and electrical fields
- Hermetically sealed
- Sensor head measures 28x6 mm
- Low power consumption
- Low insertion loss
- Passive opto-mechanical sensing with a MEMS silicon mirror
- Sensor separated from the measurement electronics by optical fibers
- Axial or radial sensing direction
- Stainless steel or MACOR insulating package
Specifications
| Measurement range | 30 G |
|---|---|
| Sensor head size | 28x6 mm |
| Sensing element | Micromechanical Silicon mirror (MEMS) |
| Sealing | Hermetically sealed |
| Package type | none (Stainless steel), c (MACOR (insulating package)) |
|---|---|
| Sensing Direction | a (Axial), r (Radial) |
| Fiber type | 100 (Multimode 100um core) |
| Fiber pigtail | B (Bare fiber 250 um) |
| Fiber Length | 10 (100cm), 80 (800cm) |
Applications
- Vibration sensing in harsh environments
- Acceleration measurement in strong magnetic or electrical fields
- Applications requiring reduced sensor size and weight
Options & Accessories
| Option | Description |
|---|---|
| c | MACOR package (insulating package) — Package type option; default (no code) is stainless steel |
| a | Axial sensing direction |
| r | Radial sensing direction |
| 100 | Multimode 100um core fiber |
| B | Bare fiber 250 um pigtail |
| 10 | Fiber length 100cm |
| 80 | Fiber length 800cm |