Name: Luna os4230 Ruggedized Metallic FBG Temperature Probe
Brand: Luna
SKU: os4230

Overview

The Luna os4230 is the ruggedized metallic probe version of the os4200 Temperature Probe series. It is a sealed stainless steel tube based on fiber Bragg grating (FBG) technology, designed so that handling is easy and sensor installation is 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 os4200 probes are equally sensitive and accurate while providing a wider operating range, no EMI noise and qualification for use in harsh environments. The os4230 uses a 316 stainless steel probe with 3 mm armored cable, operating much like a conventional thermocouple package, and offers optional connectors with protection fittings.

The sensor can be used alone or in series at the end of an FBG sensor array. Installation and cabling for such arrays is less expensive and cumbersome than for comparable electronic gage networks.

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 and then record, display and transmit data for large networks of sensors.

Key Features

Calibrated for high absolute accuracy
Fast response time
Capable of measuring from -70 to +275 degrees C
Rugged sensor packages, qualified to same rigorous standards applied to electronic gages
Double-ended design supports multiplexing of many sensors on one fiber
Armored fiber cable weldable package and rugged sensor package
Connector protection fittings available for harsh environments
Fast, simple, repeatable installation
Included in ENLIGHT’s sensor templates for quick and easy optical to mechanical conversions

Specifications

Thermal Properties

Operating temperature range	-40 to 120°C, -70 to 275°C available Standard: -40 to 120 °C; Extended range: -70 to 275 °C
Temperature sensitivity	~10pm/ºC (±1.7pm/ ºC)
Cable temperature range	-40 to 250° C (FC/APC Connectors: -40 to 80°C)
Response time os4230	1.5 Seconds Time to reach 63% of total temperature drop in water (100°C)
Standard calibration (included) long term accuracy	1.0°C Based on 275°C soak for 1,100 hours
Standard calibration (included) short-term accuracy	0.6°C Typical
Premium calibration (optional) long term accuracy	0.5°C Absolute accuracy of sensor is dependent on capability of interrogation instrument
Premium calibration (optional) short-term accuracy	0.2°C Typical

Physical Properties

Probe (diameter x length) os4230	4.76 x 142.9 mm
Weight (including cable) os4230	30g
Housing material os4230	316 Probe w/ Armored Cable
Cable length	1 m (± 10 cm), each end
Fiber type	SMF28-Compatible
Cable bend radius	≥ 17 mm
Cable type os4230	3mm Armored Cable
FC/APC connector os4230	Both Connector and Protection Fittings Optional
Fastening method os4230	3/16" Compression Fitting

Optical Properties

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

Ordering Information

Part number format	os42aa-wwww-1xx-y-zz aa = mode (30 = Ruggetized Metallic Probe), wwww = wavelength, 1xx = cable length and connector, y = calibration method, zz = calibration range
Ordering example os4230	os4230-1560-1FC-S-SR

Specifications are taken from the manufacturer's documentation. See the datasheet for complete and current values.

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 — 1.0°C long term accuracy; 0.6°C short-term accuracy, typical (included)
P	Premium calibration — 0.5°C long term accuracy; 0.2°C short-term accuracy, typical (optional)
SR	Standard Range calibration — -40 to 120°C
HR	High Range calibration — 20 to 275°C
ER	Extended Range calibration — -70 to 275°C