os4300 Series Non-Metallic FBG Temperature Sensors
Series of three fiber Bragg grating temperature sensors housed in non-metallic tubes, with sub-second response on the os4310.
- Operating temperature range
- -40 to 120°C
- Operating temperature range (single-ended)
- -70 to 275C
- Temperature sensitivity
- ~10pm/ºC (±1.7pm/ ºC)
- Cable temperature range
- -40 to 250° C
Overview
The os4300 Non-Metallic Temperature Sensors are fiber Bragg grating (FBG) temperature sensors housed within a sealed alumina ceramic tube, designed to make handling easy and installation fast and repeatable. No epoxies hold the fiber to the tube, so long-term stability is ensured by design.
In side-by-side comparisons with conventional thermocouples, the os4300 is equally sensitive and accurate, while offering sub-second response time, a wider operating range, no calibration requirement and no EMI noise. The sensor is qualified for use in harsh environments.
Three packaging options are available: the os4310 non-metallic sensor, the os4330 non-metallic epoxy-mount sensor and the os4350 armored-cable flange-mount sensor. These allow installation that mimics conventional thermocouples with armored cables and protected connectors, as well as small sensors offering installation flexibility and sub-second thermal response.
The sensor can be used alone or in series as part of an FBG sensor array. Each sensor ships with a Sensor Information Sheet listing the calibration coefficients needed to convert wavelength information into temperature. The ENLIGHT Sensing Software provides a utility to calculate, record, display and transmit data for large networks of sensors.
Models in this series
| Model | Description | |
|---|---|---|
| os4310 |
Luna os4310 Non-Metallic FBG Temperature Sensor
Fiber Bragg grating temperature sensor in a sealed alumina ceramic tube, with a 0.7 s response time and an optional single-ended version. |
Details → |
| os4330 |
os4330 Non-Metallic Epoxy Mount FBG Temperature Sensor
Epoxy-mount fiber Bragg grating temperature sensor housed in a sealed alumina ceramic tube, with a 4.6 s response time. |
Details → |
| os4350 |
os4350 Non-Metallic FBG Temperature Sensor, Armored Cable, Flange Mount
Fiber Bragg grating temperature sensor from the os4300 series with armored cable and flange mount for harsh-environment installation. |
Details → |
Key Features
- Calibrated for high absolute accuracy
- Fast response time
- Non-metallic construction
- Rugged sensor package, qualified to the same rigorous standards applied to electronic gages
- Double-ended design supports multiplexing of many sensors on one fiber
- Included in ENLIGHT's sensor templates for quick optical to mechanical conversions
- Fast, simple, repeatable installation
- Armored fiber cable weldable package
- Connector protection fittings available for harsh environments
- Several package options for field applications
- No epoxies holding the fiber to the tube
Specifications
| Operating temperature range |
-40 to 120°C
Web page lists 40 to 120 °C; datasheet value used. |
|---|---|
|
Operating temperature range (single-ended)
os4310 |
-70 to 275C
Available on the single ended os4310 |
| Temperature sensitivity | ~10pm/ºC (±1.7pm/ ºC) |
| Cable temperature range |
-40 to 250° C
FC/APC Connectors: -40 to 80°C |
|
Response time
os4310 |
0.7 seconds
Time to reach 63% of total temperature drop in water (100°C) |
|
Response time
os4330 |
4.6 seconds
Time to reach 63% of total temperature drop in water (100°C) |
|
Response time
os4350 |
4.2 seconds
Time to reach 63% of total temperature drop in water (100°C) |
| Standard calibration (included) long-term accuracy |
1.0°C
Based on 120ºC soak for 1,000 hours; absolute accuracy dependent on capability of interrogation instrument |
| Standard calibration (included) short-term accuracy |
0.6°C
Typical; four thermal cycles from min to max temperature |
| Premium calibration (optional) long-term accuracy |
0.5°C
Based on 120ºC soak for 1,000 hours; absolute accuracy dependent on capability of interrogation instrument |
| Premium calibration (optional) short-term accuracy |
0.2°C
Typical; four thermal cycles from min to max temperature |
|
Dimensions (L x W x H)
os4310 |
18.8 x 3.2 x 3.2 mm |
|---|---|
|
Dimensions (L x W x H)
os4330 |
31.8 x 7.6 x 7.6 mm |
|
Dimensions (L x W x H)
os4350 |
31.5 x 15.0 x 7.6 mm |
|
Weight (including cable)
os4310 |
2.6g |
|
Weight (including cable)
os4330 |
4.3g |
|
Weight (including cable)
os4350 |
38g |
|
Housing material
os4310, os4330 |
Alumina |
|
Housing material
os4350 |
Anodized Aluminum |
| Cable length | 1 m (± 10 cm) |
| Fiber type |
SMF28-Compatible
Printed as 'Filter Type' in the datasheet |
| Cable bend radius | ≥ 17 mm |
|
Cable type
os4310, os4330 |
1mm Fiberglass Braid |
|
Cable type
os4350 |
3mm Armored Cable |
|
FC/APC connector
os4310, os4330 |
Optional |
|
FC/APC connector
os4350 |
Both Connector and Protection Fittings Optional |
|
Fastening method
os4310 |
Bond Strain Reliefs Only |
|
Fastening method
os4330 |
Epoxy Type |
|
Fastening method
os4350 |
#6 Self Drilling Screws or Epoxy |
| Peak reflectivity (Rmax) | > 70% |
|---|---|
| FWHM (-3 dB point) | 0.25 nm (± .05 nm) |
| Isolation |
> 15 dB
@ ± 0.4 nm around center wavelength |
| Wavelengths |
Standard - 1460 to 1620 nm in 4 nm intervals
+/- 1nm |
Applications
- Process temperature monitoring
- SHM for civil and geotechnical structures
- SHM for energy systems
- Structures (bridges, dams, tunnels, mines, buildings, oil platforms)
- Energy (wind turbines, oil wells, pipelines, nuclear reactors, generators)
- Transportation (railways, trains, roadways, specialty vehicles, cranes)
- Marine vessels (hull, deck, cargo containers)
- Aerospace (airframes, composite structures, wind tunnels, static and dynamic tests)
Options & Accessories
| Option | Description |
|---|---|
| 10 | Non-metallic (os4310) — Model code in ordering information |
| 30 | Non-metallic, Epoxy Mount (os4330) — Model code in ordering information |
| 50 | Armored Cable, Flange Mount (os4350) — Only with FC option |
| UT | Unterminated — Termination type for cable 1 or cable 2 |
| FC | FC/APC Connector — Termination type for cable 1 or cable 2 |
| PF | FC/APC Connector with Protection Fitting — Termination type for cable 1 or cable 2 |
| 00 | Single Ended Sensor — Cable 2 termination; available only for os4310 |
| S | Standard Calibration — Calibration method; included |
| P | Premium Calibration — Calibration method; optional |