| Description |
Details
LEDspec is a stand alone LED-based bio-photometric detection system targeted at flow analysis and single-scan applications. Absorbance can be measured simultaneously with high precision and dynamic range.
Cost effective
LEDspec can be equipped with up to 7 LEDs of different wavelength. Its noise (< 0.1 mAU peak to peak) and drift performance (<0.5 mAU/h) exceeds a photodiode array based detection system at a fraction of the cost.
Dual-beam approach
LEDspec is based on a dual-beam approach. Light sources related baseline drift caused by warm up, temperature stability and bulb aging in conventional single beam spectrometer systems is avoided. A reference channel in the LEDspec corrects for baseline simultaneously with the sample measurement. Life time of the LED modules is virtually unlimited.
Absorbance, transmission, intensity
LEDspec allows measurement of absorbance, transmission or intensity at a single wavelength or at multiple wavelengths. When the detector is setup for single wavelength detection, very precise fluid injection analysis systems can be assembled, Using two wavelengths, baseline offsets caused by e.g. particles in the sample stream can be observed and automatically subtracted. Measurements at several wavelengths allow for multi-wavelength calibration. The result of the measurement can be calculated, calibrated and scaled to the user’s desirable dynamic range.
Works with LWCC
LEDspec is ideally suited for WPI’s fiber optic sampling equipment. High sensitivity detection systems for flow analysis can be assembled using WPI’s Liquid Waveguide Capillary Cells (LWCC) with effective pathlengths ranging from 2 to 500 cm. These setups are frequently used in fluid injection analysis systems for nutrient analysis (nitrite, nitrate, phosphate, iron) in oceanographic applications.
Data collection and analysis
The analog output of the LEDspec can be connected to WPI’s Lab-Trax-4/16 data acquisition system for data collection and analysis. High precision intensity, absorbance or transmittance measurements can be obtained in less than a second. Only a few parameters need to be adjusted to obtain data. Chromatograms can be displayed and logged to disk. Data Export is supported in ASCII, and Excel formats. Pumps and valves can be controlled via the TTL level digital outputs of the LabTrax system. Data collection can be triggered by TTL leveled external inputs. The LabTrax software package allows display of recorded data and performs mathematical computation, derivation, smoothing, quantification and other mathematical manipulations.
Applications
Nutrient Analysis: Nitrite/nitrate @ 540 nm, Phosphate @ 700 nm, Iron @ 560 nm. Pharmaceutical Industry: Drug discovery, Dissolution Testing, Process Control. Semiconductor Industry: Water purity, Trace metal analysis: (Fe, Pd, Cu, U, etc.). |
| Specifications |
| OPTICAL BASICS | LED based multiple wavelength detector with build-in reference channel | | CHANNELS | 2 or 4 | | DETECTOR | Photodiode | | WAVELENGTH RANGE: | 400 nm, 450 nm, 540 nm, 560 nm, 700 nm, custom | | SPECTRAL BANDWIDTH (FWHM) | 10 nm | | DYNAMIC RANGE | 0-3 AU | | DETECTOR RESOLUTION | 24 Bit | | NOISE (PEAK TO PEAK)* | < 0.1 mAU | | WARMUP TIME | INSTANT | | FIBER OPTIC INPUT | 600 µm | | DRIFT | < 0.5 mAU/h | | DIGITAL INPUTS AND OUTPUTS | 8/8 | | ANALOG OUTPUT | +/- 10 V, scaleable output | | SAMPLE CELLS | LWCC, DipTip, SpectroPipetter, fiber opic cuvette holder | | DIMENSIONS (W*H*D) | 290 x 80 x 250 mm, (11.4” x 3.2” x 9.9”) | | WEIGHT | 2 kg (2.2 lbs) | | INTERFACE | USB | | MAINS | 100 – 240 V / 50 - 60 Hz |
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| Manuals and Resources |
Additional information not available |
| References |
Have you seen a reference to this product in a published paper? If so, email your contact information and the citation and we will send you a free gift! |
| Ordering Information |
To place an order for this product, please contact the appropriate WPI office or distributor.
Customers can order direct from our China office:
WPI China
Address: Rm.20A, No.8 Dong Fang Rd, Liang Feng Building, Lu Jia Zui Financial District, Shanghai PRC
Phone:+86 21 68885517
Fax:+86 21 68885537
Code:200120
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| Accessories |
89245 - LED Module, 450 nm
89247 - LED Module, 540 nm
89248 - LED Module, 560 nm
89249 - LED Module, 700 nm
LWCC-2200-LED - LEDspec Upgrade: LWCC-2200
LWCC-2100-LED - LEDspec Upgrade: LWCC-2100
LAB-TRAX-4-LED - LEDspec Upgrade with Data Acquisition System
PERIPRO-4L - Peri-Star Pro 4-channel, low rate pump
PERIPRO-4L-220 - Peri-Star Pro 4-channel, low rate pump |
| Application Notes |
Application Notes
No Application Notes available for this product at this time. |
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