Transform your diagnostic testing with the Optilite® Analyser

The robust and proven analyzer from The Binding Site, bringing you a reliable and optimized solution for special protein testing




Simplified workflow for special protein testing


Unique and extensive assay menu developed and supported by dedicated local and global teams of technical and scientific experts


Fully automated dilutions eliminate a source of user error, and optimized antigen excess protection can prevent reporting of falsely low or even false negative results


Efficient handling of high sample workload and minimal operator intervention frees up valuable lab staff time

Cost efficiency

Optimized measuring ranges and dilution steps, efficient reagent usage & stability and excellent mean time between failure

Optimized and proven special protein analysis

"We needed an analyser that could run these special protein assays quickly and efficiently, which led to the decision to move them to the Optilite as a stand alone analyser - The biggest benefit we have seen is to our workflow" - Peterborough City Hospital

To deliver the best service to your clinicians, special protein testing requires consistently high-quality results with predictable, short turnaround times. The highly reliable and compact Optilite system features fully automated dilutions plus unrestricted access for samples and reagents, enabling a streamlined workflow for your entire laboratory.

Worldwide, over 1000 satisfied customers are benefiting from the optimised solution of Binding Site assays and systems. Through the support from a global team of technical and scientific protein experts, we bring you consistent throughput and high-quality results combined in a seamless workflow for ultimate peace of mind.

  • Average mean time between failure greater than 19 months*
  • Predictable reporting times enabling optimal management of laboratory staff and resources
  • Full traceability through barcoded reagents, calibrators and controls
  • 3 different methods of antigen excess detection applied when required during assay design
  • IVDR Class A compliant and supports ISO 15189 accreditation
  • Supported by a global team of technical and scientific experts
*Based on 12 months global data between September 2022 and September 2023
  • Consistent and high average throughput of 120 tests/hour 
  • Quick time to reportable result - approximately 40% faster compared to alternative systems1
  • Save reagents with our optimized protocols, including large dilution steps and wide measuring ranges
  • Single-use cuvettes remove risk of cuvette degradation and potential source of carry-over
  • Cost-effective reagent management with up to 3 months open vial stability
  • High-quality test menu including unique assays such as Hevylite® assays, CH50 and IgA1/2


Figures based on internal testing                                                                                                                                           
  • Fully automated dilutions for minimal hands-on time
  • Continuous loading and unloading of samples, reagents and disposables
  • Capacity of 360 disposable cuvettes increasing walk-away time
  • Efficient reagent management with on-board cooling
  • Short turnaround time (STAT) function for urgent samples
  • Easy-to-use software and bi-directional laboratory information system (LIS)-interface


Improvement in Workflow and Efficiency for Measurement of Special Proteins Using the Optilite Standalone Automated Analyzer. Saenger et al, 
Performed at Hennepin County Medical Center, Minneapolis, USA. Presented at the 2021 AACC Annual Scientific Meeting & Clinical Lab Expo, September 26-30, 2021 in Atlanta, Georgia
Read more about the Optilite analyser
The optimal and dedicated analyser for special protein testing
Discover the details
Technical specifications for the Optilite analyser
Why choose the Optilite analyser
Gain in efficiency, productivity and quality

Assay Menu

Monoclonal Gammopathies

Freelite® Assay Menu       Product Code       Kit Size      
Freelite Kappa
100 test
Freelite Lambda
100 test
Hevylite® Assay Menu           Product Code      Kit Size     
Hevylite IgA Kappa
50 test
Hevylite IgA Lambda
50 test
Hevylite IgM Kappa
50 test
Hevylite IgM Lambda NK626.OPT 50 test
Hevylite IgG Kappa
50 test
Hevylite IgG Lambda NK622.OPT 50 test


Description            Product Code     Kit Size   
C1 Inactivator Kit NK019.OPT 50 tests
C3c Kit NK023.OPT 100 tests
C4 Kit NK025.OPT 100 tests
CH50 Reagent NK095.OPT 100 tests
CH50 Calibrator NC095.OPT 1 pack
CH50 Controls NQ095.OPT 1 pack

Central nervous system disorders

Description                         Product Code       Kit Size  
Optilite Freelite Mx kappa Latex Kit LK016.M.OPT 100 test
Optilite Freelite Mx™ Lambda Latex Kit     LK018.M.OPT          100 test
Optilite Low Level Albumin Kit LK032.M.OPT 100 test
Optilite Low Level IgG Kit NK004.LL.OPT 60 test
Optilite IgA CSF Kit LK010.L.OPT 60 test
Optilite IgM CSF Kit LK012.L.OPT 60 test


Immunoglobulin assays     Product Code   Kit Size  
Optilite IgA Kit NK010.OPT 100 test
Optilite IgD Kit LK013.OPT 100 test
Optilite IgE Kit* LK014.OPT 100 test
Optilite IgG Kit NK004.OPT 100 test
Optilite IgM Kit NK012.OPT 200 test

Renal Function

Description                  Product Code   Kit Size  
Cystatin C LK048.OPT 100 test
Albumin NK032.OPT 100 test
Low Level Albumin NK032.L.OPT 100 test
Beta-2-Microglobulin LK043.OPT 100 test
Low Level IgG NK004.LL.OPT 200 test
Transferrin Urine NK070.U.OPT 100 test
Beta-2-Microglobulin Urinev LK043.L.OPT 100 test
Alpha-1-Microglobulin Urine NK036.U.OPT 50 test
Alpha-2-Macroglobulin Urine   NK039.U.OPT 100 test


Description Product Code Kit Size
Optilite IgG1 Kit NK006.OPT 100 test
Optilite IgG2 Kit NK007.OPT 100 test
Optilite IgG3 Latex Kit   LK008.OPT 100 test
Optilite IgG4 Latex Kit  
100 test
Optilite IgA1 Kit NK087.OPT 50 test
Optilite IgA2 Latex Kit LK088.OPT 50 test

Specific proteins

Description Product Code Kit Size
Optilite Alpha-1-Acid Glycoprotein Kit NK063.OPT 100 test
Optilite Alpha-1-Antitrypsin Kit NK034.OPT 100 test
Optilite Alpha-2-Macroglobulin Kit NK039.OPT 100 test
Optilite Anti-Streptolysin O Kit LK189.OPT 100 test
Optilite Anti-Tetanus Toxoid Immunoglobulin Kit LK110.OPT 200 test
Optilite Apolipoprotein A-1 Kit* NK085.OPT 100 test
Optilite Apolipoprotein B Kit* NK086.OPT 100 test
Optilite Caeruloplasmin Kit NK045.OPT 50 test
Optilite C-Reactive Protein Kit* NK044.OPT 100 test    
Optilite High Sensitivity C-Reactive Protein Kit           LK044.L.OPT 100 test
Optilite Haptoglobin Kit NK058.OPT 100 test
Optilite Lipoprotein Kit* LK098.OPT 100 test
Optilite Prealbumin Kit NK066.OPT 100 test
Optilite Rheumatoid Factor Kit LK151.OPT 100 test
Optilite Total Protein Kit* NK061.OPT 100 test
Optilite Transferrin Kit NK070.OPT 100 test

Vaccine response

Description Product Code    Kit Size  
Tetanus Toxoid IgG response MK010 96 test
Diptheria Toxoid IgG response MK014 96 test
Haemophilus influenzae type B IgG MK016 96 test
Pneumococcal Capsular Polysaccharide (PCP) IgG response   MK012 96 test
Salmonella typhi Vi IgG  response MK091 96 test

*Calibrators and Controls are supplied separately
Product availability is subject to specific regulatory requirements.

Optimized immunoassays for the Optilite® Analyser
Optimized immunoassays for the Optilite® Analyser

Binding Site Immunoassays are optimised for use on the Optilite System for consistent and high-quality results. Learn about our extensive range of Immunoassays available for special protein analysis.
Peer to peer QC comparison with LabLink xL™
LabLink xL
Peer to peer QC comparison with LabLink xL™

LabLink xL is the dedicated peer QC solution for Binding Site controls run on the Optilite System. LabLink xL allows the laboratory to monitor their mean values for precision and accuracy within a peer-group using the same analyzer, and the same lot of the same assay kit.
1. Ghillani P, et al. Analytical performances of Optilite® turbidimeter (The Binding Site): a new dedicated analyser for specific proteins determination. Ann Biol Clin (Paris) 2017; 75:29-37

Product availability is subject to specific regulatory requirements.
Contact your local representative for availability in your country. Optilite, Freelite and Hevylite are registered trademarks of the Binding Site Group Ltd (Birmingham, UK) in certain countries. Freelite Mx is a trademark of the Binding Site Group Ltd (Birmingham, UK) in certain countries. Other Brand or product names may be trademarks of their respective holders.
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