Name: Luna os7510 Fabry-Pérot Fiber Optic Accelerometer (os7500 Series)
Brand: Luna
SKU: os7510

Overview

The os7510 is a member of the Luna os7500 family of fiber optic accelerometers, which are based on Fabry-Pérot (FP) technology. Used with the HYPERION instrument platform, the sensor can be combined with other FP and FBG sensors in multi-sensor distributed measurement systems.

The os7500 sensors are intended as a replacement for conventional accelerometers in vibration measurement applications, adding EMI immunity, a robust package and resistance to lightning and corrosion. Within the family, the os7510 covers the wider frequency range of 0 to 350 Hz, while the os7520 is the higher-sensitivity, lower-frequency model.

Multiplexing

The sensor uses a two-fiber I/O design that allows sensors to be multiplexed in a daisy-chain architecture. Each sensor responds only to optical signals within a 20 nm band and passes all other wavelengths in both directions, so up to 8 accelerometers can be combined per optical channel on a HYPERION instrument with a 160 nm wavelength range.

Software

The ENLIGHT Sensing Software provides a utility to calculate, record, display and transmit data for large networks of sensors, and supports configuration and setup of the os7500 sensors.

Key Features

Wide dynamic range
High sensitivity
Low noise
Armored fiber cable
Rugged sensor package
Straightforward multiplexing for distributed measurement systems
Up to 8 sensors per optical channel with a 160 nm HYPERION instrument
EMI immunity
Standard threaded connection to a structure for fast, simple and repeatable installation
Available mounting block for two and three axis configurations
Simple configuration and setup with ENLIGHT Sensing Software

Specifications

Performance Properties

Input range	+/- 2.5 g, +/- 10 g below 10 Hz Input range tolerance is +/- 25%.
Frequency range	0 to 350 Hz Aliasing can occur for frequencies > 0.5 the sampling frequency.
Output noise	< 50 μg/Hz1/2
Sensitivity	65 nm/g As measured by a si255 HYPERION instrument. Tolerance is +/- 25%.
Bias temperature shift	< 0.1 g/C
Operating temperature range	-40 to 80 C
Scale factor temperature shift	+/-100 ppm/C
Nonlinearity	< 2 %
Transverse sensitivity	< 2%
Maximum mechanical shock	500 g, Peak

Physical Properties

Dimensions	43 mm x 14 mm x 12.6 mm
Weight	45 g
Mounting method	10-32 Tapped hole
Case material / plating	Gold over nickel-coated Kovar
Cable type / length	Ruggedized tactical cable / 1m +/-0.1 m
Fiber type	SMF-28
Sensor wavelength range	20 nm

Ordering

Part number format	os7510-wwww-1xx-1yy-z
wwww Center wavelengths (20nm band)	Standard -1470, 90, 1510, 30, 50, 70, 90 & 1610nm
1xx Cable 1, length & connector	1 m Standard, Cable Length; UT Unterminated; FC FC/APC Connector
1yy Cable 2, length & connector	1 m Standard, Cable Length; UT Unterminated; FC FC/APC Connector

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

Options & Accessories

Option	Description
PF	Universal IP-67 Connector Protection
MB75	3 axis mounting block for os7500
UT	Unterminated cable termination — Termination type for cable 1 (xx) or cable 2 (yy)
FC	FC/APC Connector termination — Termination type for cable 1 (xx) or cable 2 (yy)