os4200 Series FBG Stainless Steel Temperature Probes
Sealed stainless steel temperature probes based on fiber Bragg grating (FBG) technology, offered in three versions for -70 to +275 °C measurement.
- Operating temperature range
- Standard: -40 to 120 °C; Extended range: -70 to 275 °C
- Temperature sensitivity
- ~10 pm/°C (±1.7 pm/°C)
- Cable temperature range
- -40 to 250 °C
- Response time
- 0.3 s
Overview
The os4200 Temperature Probes are sealed stainless steel tubes based on fiber Bragg grating (FBG) technology, designed for easy handling and fast, repeatable installation. No epoxies hold the fiber to the tube, which supports long-term stability by design. The series comprises three versions: the os4210 sensor probe, the os4230 ruggedized metallic probe and the os4280 ruggedized probe with thermocouple head.
In side-by-side comparisons with conventional thermocouples, the os4200 is equally sensitive and accurate, while providing sub-second response time, a wider operating range and freedom from EMI noise. The probe is qualified for use in harsh environments.
The sensor can be used alone or in series at the end of an FBG sensor array, where installation and cabling are less expensive and cumbersome than comparable electronic gage networks. Package options include versions that operate like conventional thermocouples with armored cables and protected connectors, and small probes for installation flexibility and sub-second response time.
Calibration and software
Each sensor is supplied 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. The probes are used with HYPERION interrogators for testing and monitoring applications.
Models in this series
| Model | Description | |
|---|---|---|
| os4210 |
Luna os4210 FBG Temperature Sensor Probe
Small stainless steel fiber Bragg grating temperature sensor probe from the os4200 series with a 0.3 s response time. |
Details → |
| os4230 |
Luna os4230 Ruggedized Metallic FBG Temperature Probe
Ruggedized stainless steel fiber Bragg grating temperature probe with armored cable and a 1.5 s response time. |
Details → |
| os4280 |
Luna os4280 Ruggedized FBG Temperature Probe with Thermocouple Head
Ruggedized stainless steel fiber Bragg grating temperature probe with aluminum thermocouple head and armored cable, member of the os4200 series. |
Details → |
Key Features
- Calibrated for high absolute accuracy
- Fast response time
- Capable of measuring from -70 to +275 °C
- Rugged sensor packages, qualified to the same rigorous standards applied to electronic gages
- Double-ended design supports multiplexing of many sensors on one fiber
- Included in ENLIGHT sensor templates for quick optical to mechanical conversions
- Fast, simple, repeatable installation
- Armored fiber cable weldable package and rugged sensor 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 | Standard: -40 to 120 °C; Extended range: -70 to 275 °C |
|---|---|
| Temperature sensitivity | ~10 pm/°C (±1.7 pm/°C) |
| Cable temperature range |
-40 to 250 °C
FC/APC connectors: -40 to 80 °C |
|
Response time
os4210 |
0.3 s |
|
Response time
os4230 |
1.5 s |
|
Response time
os4280 |
8.5 s |
| Accuracy (Standard calibration, included) |
1.0 °C (0.6 °C short term, typical)
Long-term accuracy based on 275°C soak for 1,100 hours |
| Accuracy (Premium calibration, optional) |
0.5 °C (0.2 °C short term, typical)
Long-term accuracy based on 275°C soak for 1,100 hours |
|
Probe (diameter x length)
os4210 |
1.07 x 27.1 mm |
|---|---|
|
Probe (diameter x length)
os4230 |
4.76 x 142.9 mm |
|
Probe (diameter x length)
os4280 |
6.35 x 137.9 mm |
|
Weight (including cable)
os4210 |
1.3 g |
|
Weight (including cable)
os4230 |
30 g |
|
Weight (including cable)
os4280 |
411 g |
|
Housing material
os4210 |
302 Stainless Steel |
|
Housing material
os4230 |
316 Probe w/ Armored Cable |
|
Housing material
os4280 |
316 Probe w/Aluminum Thermocouple Head |
| Cable length | 1 m (± 10 cm), each end |
| Fiber type | SMF28-Compatible |
| Cable bend radius | ≥ 17 mm |
| Cable type |
0.9 mm Fiberglass Braid / 3mm Armored Cable
Varies by model as listed in the data sheet |
| FC/APC connector |
Optional / Both Connector and Protection Fittings Optional
Varies by model as listed in the data sheet |
|
Fastening method
os4210 |
Insertion or Bond |
|
Fastening method
os4230 |
3/16" Compression Fitting |
|
Fastening method
os4280 |
1/4" Compression Fitting |
| 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 |
| Part number format |
os42aa-wwww-1xx-y-zz
Example: os4230-1560-1FC-S-SR |
|---|
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 |
|---|---|
| UT | Unterminated — Termination type |
| FC | FC/APC Connector — Termination type |
| PF | FC/APC Connector with Protection Fitting — Termination type |
| S | Standard calibration — Calibration method (included) |
| P | Premium calibration — Calibration method (optional) |
| SR | Standard Range, -40 to 120°C — Calibration range |
| HR | High Range, 20 to 275°C — Calibration range |
| ER | Extended Range, -70 to 275°C — Calibration range |