Ocean Optics - Inventor of the World's First Miniature Spectrometer

USB-LS-450 LED Light Source Module

The USB-LS-450 is an integrated, multi-purpose LED light source module designed for use with either a USB4000-FL Spectrometer (or its predecessor, the USB2000-FL Spectrometer), a small-footprint, plug-and-play spectrometer that plugs into the USB port of any desktop or notebook PC. The USB-LS-450 is available for only $635 and can be used for general fluorescence measurements or as part of a Fiber Optic Oxygen Sensor system.

Features

Simplified LED-spectrometer interface -- LED connects to spectrometer, which plugs directly into Universal Serial Bus port of any desktop or notebook PC.
Small footprint -- LED-spectrometer combination is about the size of a deck-and-a-half of playing cards.
On-board memory for oxygen measurements -- Fiber Optic Oxygen Sensor users can conveniently store calibration temperature calibration coefficients and oxygen calibration coefficients.
No external power requirements -- Spectrometer and LED draw power from the PC.

The USB-LS-450 module connects to the USB Series spectrometers via a connector on the front of the spectrometer. The spectrometer provides power to the LED and also enables synchronization functions and I2C communications.

In addition, the USB-LS-450 features a built-in, 24-bit analog-to-digital converter with an analog front end that is configured for a 100 ohm platinum RTD (resistance temperature device). This is particularly useful when configured as part of a Fiber Optic Oxygen Sensor. In fact, the unit has on-board memory to store temperature calibration coefficients and oxygen calibration coefficients.

The USB-LS-450 can provide 4-20 mA output via a daughter card, making it especially useful for process applications.

User's Tip: The USB-LS-450 board allows for software-controlled switching between pulsed and CW operation of the LED.

USB-LS-450 Spectral Output

USB-LS-450 LED Specifications

Criteria	Specification
Power output:	60 µW into a 600 µm optical fiber
LED drive current:	20 mA +/-150 mA
Maximum modulation frequency:	1 kHz
0.5% stability time:	less than 1 minute
Temperature-dependent drift:	+0.1%/ºC

Temperature Measurement Specifications

Criteria	Specification
Precision:	better than 0.1 °C
Accuracy:	better than 0.5 °C
Maximum data rate:	15 samples/second

Power Requirements

Criteria	Specification
Input voltage range:	3.0-8.0 volts
Quiescent range:	~20 mA
Current with light on:	~20 mA

Ordering Information

Item	Description	Price
USB-LS-450	LED drive module for use with USB Series Spectrometers	$635
USB-LS-450-TP	Platinum RTD-type temperature probe for USB-LS-450	$115
USB-LS-450-4/20	4-20 mA output module for USB-LS-450	Call for Price
USB4000-FL	Spectrometer with a 360-1000 nm range; should be specified when used with USB-LS-450 and Oxygen Sensors	$2887

Sample Oxygen Sensor System Order with USB-LS-450 and Accessories

Item	Comments	Price
Spectrometer:	USB4000-FL Spectrometer (360-1000 nm)	$2887
USB-LS-450 Excitation Source:	Blue LED drive module	$635
USB-LS-450-TP Temperature Probe:	Platinum RTD-type temperature probe (optional)	$115
USB-LS-450-4/20 mA output:	4-20 mA output module for process applications (optional)	Call for Price
Probe:	Select from 6 standard options (contact an Applications Scientist for details)	Depends on probe selected
Fiber:	Bifurcated optical fiber (200 µm, 400 µm or 600 µm; selection depends on probe specified)	Call for Price
21-02 Splice Bushing:	To connect fiber to probe	$14
OOISensors Software:	OOISensors 32-bit operating software	Call for Price

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Fiber Optic Oxygen Sensors

Sample Application

LS-450 and Additional LEDs