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.
- Operating temperature range
- -40 to 120°C
- Temperature sensitivity
- ~10pm/ºC (±1.7pm/ ºC)
- Cable temperature range
- -40 to 250° C (FC/APC Connectors: -40 to 80°C)
- Response time
- 4.2 seconds
Overview
The Luna os4350 is the armored-cable, flange-mount version of the os4300 non-metallic temperature sensor series. Like the other os4300 models, it is based on fiber Bragg grating (FBG) technology. The fiber is not held to its tube with epoxy, so long-term stability is ensured by design.
The os4300 sensors are installed much like conventional thermocouples. The os4350 has a 3 mm armored cable and an anodized aluminum flange housing, which can be fastened with #6 self-drilling screws or epoxy. Compared with thermocouples, the series is equally sensitive and accurate. It also offers a wider operating range, needs no calibration and has no EMI noise. The sensors are qualified for use in harsh environments.
The sensor can be used alone or in series as part of an FBG sensor array. Its double-ended design lets many sensors share one fiber. Each sensor comes with a Sensor Information Sheet that lists the calibration coefficients needed to convert wavelength into temperature. The ENLIGHT Sensing Software includes the sensor in its templates and can calculate, record, display and transmit data for large sensor networks.
Key Features
- Calibrated for high absolute accuracy
- Fast response time
- Non-metallic sensing element based on fiber Bragg grating technology
- Rugged sensor package qualified to the same rigorous standards applied to electronic gages
- Armored fiber cable and flange-mount package
- Connector protection fittings available for harsh environments
- Double-ended design supports multiplexing of many sensors on one fiber
- No epoxies holding the fiber to the tube for long-term stability
- Included in ENLIGHT's sensor templates for quick optical to mechanical conversions
Specifications
| Operating temperature range |
-40 to 120°C
Datasheet value; the web page prints "40 to 120 °C". -70 to 275 °C is available only 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
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 depends on the capability of the interrogation instrument.
|
| Standard calibration (included), short-term accuracy |
0.6°C
Typical; four (4) 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 depends on the capability of the interrogation instrument.
|
| Premium calibration (optional), short-term accuracy |
0.2°C
Typical; four (4) thermal cycles from min to max temperature
|
|
Dimensions (L x W x H)
os4350
|
31.5 x 15.0 x 7.6 mm |
|---|---|
|
Weight (including cable)
os4350
|
38g |
|
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
os4350
|
3mm Armored Cable |
|
FC/APC connector
os4350
|
Both Connector and Protection Fittings Optional
The ordering information lists model 50 as available only with the FC option
|
|
Fastening methods
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 (+/- 1nm) | Standard - 1460 to 1620 nm in 4 nm intervals |
Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.
Applications
- Process temperature monitoring
- Structural health monitoring of civil and geotechnical structures
- Structural health monitoring of 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)
Included
- Standard calibration
- Sensor Information Sheet listing calibration coefficients
Options & Accessories
| Option | Description |
|---|---|
| 50 | Armored Cable, Flange Mount — Model code for os4350 in the ordering string (only with FC option) |
| UT | Unterminated — Cable termination type |
| FC | FC/APC Connector — Cable termination type |
| PF | FC/APC Connector with Protection Fitting — Cable termination type |
| S | Standard Calibration — 1.0°C long-term accuracy, 0.6°C short-term accuracy (typical) |
| P | Premium Calibration — 0.5°C long-term accuracy, 0.2°C short-term accuracy (typical) |
Documents & Resources
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