Colorimetric and turbidimetric analysis of endotoxins using the absorbance detection mode
Torn between a colorimetric or turbidimetric LAL assay? Whichever path you take, BMG LABTECH’s absorbance readers deliver dependable results every time.
The PHERAstar® FSX is our most sensitive multi-mode reader for high-throughput screening, combining this sensitivity with fast read times. Thanks to the unique Optic Module system, Simultaneous Dual Emission, Enhanced Dynamic Range technology, UV/vis spectrometer, AAS System, and dedicated AlphaScreen® and TRF lasers, the PHERAstar FSX will perform your assay with ease and speed, even in 3456-well microplates.


No longer worry about installing filters and dichroics: the PHERAstar FSX comes with easy-to-handle, assay-optimized Optic Modules which contain all application-specific filters, mirrors, dichroics and/or polarizers, and are automatically recognised by the plate reader. In addition, the PHERAstar FSX is equipped with four matched and assay-optimized photomultiplier tubes (PMTs) which are automatically selected for the relevant detection mode. You can also measure assays with two emission wavelengths at the same time thanks to the Simultaneous Dual Emission.
The Enhanced Dynamic Range and automatic focus technologies make manual settings superfluous and detection optimisation easier than ever.
For HTS automation purposes, the PHERAstar FSX can be easily integrated into automated systems, and offers improved robotic integration capabilities and multi-user control.
The PHERAstar FSX is for research use only.

BMG LABTECH microplate readers are built to be robust and reliable. No calibration of optical components is required. Recommended maintenance includes plate carrier offset adjustments, cleaning optical components, software/firmware updates, and routine performance checks.
BMG LABTECH offers flexible maintenance plans to ensure long-term performance. Costs depend on the chosen plan. Contact us using the service contract form.
Yes, comprehensive technical support and training services are available to assist users in maximizing the instrument’s capabilities. Contact us to find out more.
You can find detailed product information, specifications, and available configurations on the PHERAstar FSX product page. For purchase options, quotes, or personalized recommendations, please send a sales request directly.
You can request a quote for additional Optic Modules via our filter request form.
Reader manuals are included with every instrument. If you no longer have your manual, please use our manual request form to obtain a copy.
The software is included with every reader and can be installed on as many computers as needed. You can find it on a USB stick (or CD for older models) included with the manual. If you’ve misplaced the USB stick or CD, we can provide a download link. Contact our software support.
Yes, the software for your PHERAstar FSX is fully compatible with Windows 11. To ensure smooth operation on Windows 11, or if you need help with installation or have compatibility questions, please contact our software support.
Costs vary depending on the chosen configuration. Contact us for a personalized quote.
Yes, we provide comprehensive How-To Notes that explain common detection parameters, how they influence your results, and practical tips for optimizing measurements. You can find these resources on our How-To notes page.
Delivery times depend on model availability, configuration and your location. For accurate lead times, please send a general request on the contact page directly.
Torn between a colorimetric or turbidimetric LAL assay? Whichever path you take, BMG LABTECH’s absorbance readers deliver dependable results every time.
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Fluorescence intensity - incl. FRET
Fluorescence polarization
AlphaScreen®/AlphaLISA®/AlphaPlex™
Luminescence (flash and glow) - incl. BRET
Time-resolved fluorescence
TR-FRET
UV/Vis absorbance spectra
Top and bottom reading
Endpoint and kinetic
Sequential multi-excitation
Sequential multi-emission
Simultaneous Dual Emission
Spectral scanning (absorbance)
Real-time ratiometric measurements
Well scanning
Up to 3456-well plates, user-definable
LVis Plate with 16 low volume microspots (2 μL)
Robot compatible
High energy xenon flash lamp
Dedicated laser for AlphaScreen®/AlphaLISA®/AlphaPlex™
Dedicated laser for TRF and TR-FRET
Two matched pairs of photomultiplier tubes (PMTs), optimized for different detection modes
CCD spectrometer
Optic Modules: Up to six application-specific modules (includes all filters, dichroics, etc. for an application)
For top and bottom reading
UV/vis absorbance spectrometer: Full spectra or 8 distinct wavelengths in < 1 sec/well
Filters
230 - 750 nm or 230 - 900 nm for FI, FP
230 - 750 nm for LUM
230 - 900 nm for TRF
Spectrometer
220 - 1000 nm for ABS; wavelength precision: ≤ 0.5 nm
FI
(top)
< 0.15 pM FITC (384sv black, 20 μL)
< 0.5 pM FITC (1536 black, 8 μL)
Dynamic Range: 8 decades
FI
(bottom)
<1.0 pM FITC (384g black, 50 μL)
FP
< 0.5 mP SD at 1 nM FITC (384sv black, 20 μL)
< 1.5 mP SD at 1 nM FITC (1536 black, 8 μL)
TRF with laser.
< 5 fM europium (384, 80 μL)
< 15 fM europium (1536, 8 μL)
HTRF®
(black and white microplates)
Reader Control Kit (Eu) after 18h (384sv, 20 μL)
Delta F > 1100% (High Calibrator)
Delta F > 25% (Low Calibrator)
LUM
< 0.4 pM (< 8 amol/well ATP, 384sv white, 20 μL)
Dynamic Range: 8 decades
AlphaScreen® with laser
< 5 pM (< 100 amol/well P-Tyr-100, 384sv white, 20 μL)
ABS with spectrometer
Selectable spectral resolution: 1, 2, 5, and 10 nm
OD range: 0 to 4 OD; photometric resolution: 0.001 OD
Accuracy: < 1% at 2 OD
Precision: < 0.5% at 1 OD and < 0.8% at 2 OD
Linearity: ≤ 0.8% at 2.0 OD
Flying mode (1 flash)
14 s (384)
27 s (1536)
10 flashes
38 s (384)
1 min 52 s (1536)
50 flashes
1 min 29 s (384)
5 min 18 s (1536)
Linear, orbital, and double-orbital with user-definable time and speed
+5 °C above ambient up to 45 °C
The upper heating plate of the incubation chamber operates at +0.5 °C more than the lower plate. This prevents condensation build-up on the lid or sealer
With Advanced Assay Stability (AAS) system: from 18 - 45°C
Multi-user Reader Control and MARS Data Analysis Software included
FDA 21 CFR Part 11 compliant
Width: 45 cm, depth: 51 cm, height: 47 cm; weight: 49 kg
With AAS system: width: 48 cm, depth: 68 cm, height: 47 cm; weight: 62 kg
Top and bottom: free-air optical light path guided by motor-driven mirrors and dichroics
Automatic focal height adjustment (0.1 mm resolution)
Up to 2 built-in reagent injectors
Injection at measurement position (6 to 384-well)
Individual injection volumes for each well (3 to 500 µL, optionally up to 2 mL)
Variable injection speed up to 420 µL/s
Up to four injection events per well
Reagent back flushing
Up to three integrated barcode readers
Sample Capacity: sixteen separate microdrop wells for 2 µL samples; one standard cuvette position for up to 1 mL samples
Quality Control Internal Standards (optional): four NIST traceable optical density filters (approximate values of 0.1, 0.3, 0.6 and 1.0 OD); one holmium oxide filter for wavelength accuracy
Dimensions: conforms to SBS standards for microplates
Microplate incubator and shaker
Magazines for up to 50 plates - continuous loading feature
Please contact your local representative for upgrades including options such as detection modes, reagent injectors, etc
LOD = 3 x SD (20 blanks) / slope (6 pt std curve)
AlphaScreen® P-Tyr-100 assay kit, PerkinElmer, #6760620C
384sv = 384-well small volume microplates
384g = 384-well glass bottom microplates
1536 = 1536-well microplates
The PHERAstar FSX is for research use only.