os7200 Series os7250 FBG Optical Accelerometer
Fiber Bragg grating optical accelerometer with 1200 pm/g sensitivity and a 0 to 160 Hz frequency range for low-frequency vibration monitoring.
- Frequency range
- 0 to 160 Hz
- Sensitivity
- 1200 pm/g
- Measurement range
- ± 20 m/s2 (maximum)
- Resonance frequency
- > 240 Hz
Overview
The os7250 is a member of the Luna os7200 series of fiber Bragg grating (FBG) based optical accelerometers. Within the series it is the low-frequency, high-sensitivity model, covering a frequency range of 0 to 160 Hz with a sensitivity of 1200 pm/g. Like the other os7200 sensors, it can be deployed over tens of kilometers of fiber and integrated into monitoring systems.
Because the sensor is FBG based, vibration measurements can share the same fiber optic cable with sensors for other physical parameters such as strain, temperature, displacement, pressure and tilt.
The sensor installs with a standard M5 threaded connection, and mounting blocks are available for two and three axis configurations. It has a sealed stainless steel body rated IP67 and Kevlar armored cables for use in harsh environments. Up to 128 os7200 sensors can be connected to a single Luna HYPERION instrument.
Software
The os7200 series works with Luna ENLIGHT Sensing Analysis Software, which handles data acquisition, computation and analysis for optical sensor networks. It also works with the HYPERION platform's Application Programming Interface (API), which comes with examples in LabVIEW, Python, Matlab, C++ and C#.
Key Features
- High sensitivity
- Rugged sensor package
- Multipoint up to 128 sensors on a single HYPERION instrument
- Various physical parameters measurements coupled onto the same fiber optic cable
- Long distance, with 10’s of kilometers of coverage
- Available mounting block for two and three axes
- Compatible with Luna’s ENLIGHT software
Specifications
| Frequency range | 0 to 160 Hz |
|---|---|
| Sensitivity |
1200 pm/g
Sensors are individually calibrated
|
| Measurement range | ± 20 m/s2 (maximum) |
| Resonance frequency | > 240 Hz |
| Transverse sensitivity | < -40 dB |
| Maximum shock | 100 m/s2 unlocked / 1000 m/s2 locked |
| Operating temperature range | -65 to 80 °C |
| Measurement points | Up to 128 with 16 channel si255, 8 sensors per channel |
| Mounting method | M5 standard mounting thread |
| Wavelength options |
8 sensors per channel
Custom options for 1460 to 1620 nm
|
| Dimensions | 22 mm x 50 mm x 55 mm |
|---|---|
| Weight | 400 grams |
| Material | Stainless steel |
| Fiber type | SMF-28 |
| Ingress protection | IP67 |
| Connector options | FC/APC or unterminated |
| Part number format |
os7250-aaaa/tttt-1xx-1yy
aaaa/tttt = FBG wavelengths; 1xx and 1yy = cable length and connector
|
|---|---|
| Cable length | 1 m Standard |
Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.
Applications
- Structures
- Energy
- Transportation
- Marine vessels
Options & Accessories
| Option | Description |
|---|---|
| FC | FC/APC Connector — Cable connector option (1xx / 1yy fields) |
| UT | Unterminated — Cable connector option (1xx / 1yy fields) |
| Mounting block | Mounting block: 2 & 3 axis — Accessory mounting block for os7220, os7230, os7250 two and three axis configurations |
Documents & Resources
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