os7200 Series FBG Optical Accelerometers
Fiber Bragg grating (FBG) based optical accelerometers in a range of sensitivities and frequency responses for multipoint vibration monitoring.
- Frequency range
- 5 to 2000 Hz
- Frequency range
- 5 to 1000 Hz
- Frequency range
- 0 to 160 Hz
- Sensitivity
- 10 pm/g
Overview
The Luna os7200 series are fiber Bragg grating (FBG) based accelerometers offered in a range of sensitivities and frequency responses. The sensors can be distributed over tens of kilometers of fiber and integrated into monitoring systems. FBG technology lets the os7200 measure a wide range of vibration events while sharing the same fiber with sensors for other physical parameters such as strain, temperature, displacement, pressure and tilt.
Installation uses standard threaded connections, and the sensors are available in one-, two- or three-axis configurations. A sealed metallic body and Kevlar armored cables allow deployment in harsh environments. Up to 128 os7200 sensors can be connected to a single Luna HYPERION instrument, which lowers total system cost.
Software
The os7200 series works with ENLIGHT Sensing Analysis Software, which provides tools for data acquisition, computation and analysis of optical sensor networks. The HYPERION platform also offers an Application Programming Interface (API), with examples in LabVIEW, Python, Matlab, C++ and C#.
Models in this series
| Model | Description | |
|---|---|---|
| os7220 |
Luna os7220 FBG Optical Accelerometer (10 pm/g, 5 to 2000 Hz)
Fiber Bragg grating optical accelerometer with 10 pm/g sensitivity, a 5 to 2000 Hz frequency range and a ±200 g measurement range. |
Details → |
| os7230 |
Luna os7230 FBG Optical Accelerometer
Fiber Bragg grating optical accelerometer from the os7200 series with 90 pm/g sensitivity and a 5 to 1000 Hz frequency range. |
Details → |
| os7250 |
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. |
Details → |
Key Features
- High sensitivity
- Rugged sensor package
- Multipoint up to 128 sensors on a single HYPERION instrument
- Various physical parameter 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
- Sensors are individually calibrated
- Radiation hardened variant available for the os7230
Specifications
|
Frequency range
os7220 |
5 to 2000 Hz |
|---|---|
|
Frequency range
os7230 |
5 to 1000 Hz |
|
Frequency range
os7250 |
0 to 160 Hz |
|
Sensitivity
os7220 |
10 pm/g
Sensors are individually calibrated |
|
Sensitivity
os7230 |
90 pm/g
Sensors are individually calibrated |
|
Sensitivity
os7250 |
1200 pm/g
Sensors are individually calibrated |
|
Measurement range
os7220 |
±200 g- |
|
Measurement range
os7230 |
±30 g- |
|
Measurement range
os7250 |
± 20 m/s2
maximum |
|
Resonance frequency
os7220 |
> 2,500 Hz |
|
Resonance frequency
os7230 |
> 1,300 Hz |
|
Resonance frequency
os7250 |
> 240 Hz |
|
Transverse sensitivity
os7220, os7230 |
< -30 dB |
|
Transverse sensitivity
os7250 |
< -40 dB |
|
Maximum shock
os7220 |
500 g |
|
Maximum shock
os7230 |
70 g |
|
Maximum shock
os7250 |
100 m/s2 unlocked / 1000 m/s2 locked |
|
Operating temperature range
os7220, os7230 |
-40 to 60 °C |
|
Operating temperature range
os7250 |
-65 to 80 °C |
| Measurement points | Up to 128 with 16 channel si255, 8 sensors per channel |
|
Mounting method
os7220, os7250 |
M5 standard mounting thread |
|
Mounting method
os7230 |
M6 standard mounting thread |
| Wavelength options |
8 sensors per channel
Custom options for 1460 to 1620 nm |
|---|---|
| Acceleration FBG wavelengths (standard) |
1520, 1528, 1536, 1544, 1552, 1560, 1576, 1584
+/- 1 nm |
| Accel/Temp FBG wavelengths (standard) |
1513/1518, 1523/1528, 1533/1538, 1543/1548, 1553/1558, 1563/1568, 1573/1578 1583/1588
+/- 1nm |
|
Dimensions
os7220 |
14.4 mm x 34.5 mm x 41 mm |
|---|---|
|
Dimensions
os7230 |
22 mm x 45 mm x 62 mm |
|
Dimensions
os7250 |
22 mm x 50 mm x 55 mm |
|
Weight
os7220 |
100 grams |
|
Weight
os7230 |
280 grams |
|
Weight
os7250 |
400 grams |
| Material | Stainless steel |
| Fiber type | SMF-28 |
| Ingress protection | IP67 |
| Connector options | FC/APC or unterminated |
|
Part number format
os7220 |
os7220-aaaa-1xx-1yy
aaaa = FBG wavelength; 1xx / 1yy = cable length (1 m standard) and connector (FC = FC/APC, UT = unterminated) |
|---|---|
|
Part number format
os7230 |
os7230-aaaa-1xx-1yy
aaaa = FBG wavelength; 1xx / 1yy = cable length (1 m standard) and connector (FC = FC/APC, UT = unterminated) |
|
Part number format
os7250 |
os7250-aaaa/tttt-1xx-1yy
aaaa/tttt = acceleration/temperature FBG wavelengths; 1xx / 1yy = cable length (1 m standard) and connector |
Applications
- Structures
- Energy
- Transportation
- Marine vessels
Options & Accessories
| Option | Description |
|---|---|
| FC | FC/APC Connector — Connector option for the 1xx / 1yy cable fields |
| UT | Unterminated — Unterminated cable option for the 1xx / 1yy cable fields |
| Mounting block | Mounting block: 2 & 3 axis — os7220, os7230, os7250 mounting blocks for two- and three-axis configurations |