Beckman Coulter LS6500 Liquid Scintillation Counter

Beckman Coulter LS6500 Liquid Scintillation Counter

Beckman Coulter

  • 32,768-Channel Multichannel Analyzer
  • Advanced Photomultiplier Design
  • Interlocking Lead Shielding
  • User-Selectable Output Format
  • GMI offers a full line of counting cocktails
  • Complimentary Installation & Basic User Training
  • GMI sells BRAND NEW Scintillation Counters too!

For more information or to place an offline order call 1-800-745-2710


We Accept Trade-ins!

Don’t forget to tell us about any unused instruments taking up space in your lab.


The Beckman Coulter LS 6500 Liquid Scintillation Counter for sale is a high performing system that offers unparalleled flexibility.   

LS6500 liquid scintillation counter,
Choice of 15 vial racks for either standard or minivials,
Monitor, printer, and complimentary professional installation. 

The Beckman LS-6500 systems is equipped with a 32,678 channel analyzer that delivers an effective resolution of 0.06 keV for accurate results across a variety of samples. A patented H-Number Plus external quench monitor (H-Number Plus) fitted into the system provides accurate disintegrations per minute (DPM) calculations and Automatic Quench Compensation. Both measurements are independent of sample volume or cocktail composition. The feature is also the basis for instrument calibration, color detection and correction, two-phase monitoring, unquenched window determination and multi-label DPM quench curves.

Instead of lowering the compartment to the sample chamber, the LS 6500 counter raises the sample plastic racks to the sample chamber. This design prevents possible contamination of the chamber with dust or liquid residue. As for system operations, the combination of easy-to-use menus, context-sensitive help screens and 50 user programs makes the LS 6500 a one-button system.

The System Plus and System Advantage models are equipped with powerful analysis tools. Units come with a single or dual label DPM, an exclusive H-Number Plus quench monitor as well as the Versa-Rack™ vial system which allows mixing of 20 mL and 7 mL vials. Enhancement packs and other features can be added later to address emerging laboratory needs. Instrument has capacity for 336 standard vials (20 mL), or  648 mini-vials (7 mL) or combination thereof. 

Did you know that GMI offers complete and comprehensive maintenance and support plans on Beckman liquid scintillation counters – PMs to full support plans- for one instrument or dozens-one facility or multi-site labs.

Rentals or Lease?  No problem. We’d love to help with your financing or rental needs.

Thank you once again for considering purchasing this re-certified, refurbished-to-specification, Beckman LS counter  from GMI.  For over 20 years and over 100 installations  GMI removes 100% of the risk** in ‘buying used’ scintillation counter  instrumentation to discerning scientists like you. 

GMI is a ISO 9001:2008 certified company – your proof that your instrument purchase from GMI  passes through rigorous refurbishing, recalibration, and recertification process, arriving at your laboratory in fully working order and defect free.

We are not an auction company, and we nor are we an instrument broker… getting in the middle of ‘deals’.   All items come complete with the final QC date, engineer’s ID#, and a copy of test results / QC data, if applicable.  Additionally, all items are thoroughly cleaned and professionally packaged / crated with care to ensure they arrive safely in your lab ready for professional installation.

**LSC counters containing sealed sources are regulated items.  Any LSC with a sealed radioactive source cannot legally be shipped from one location to another.  GMI has the required licensing for sale & transport of LS counter with sealed sources.

Service, Parts, Relocations, Installations, Validations, Buy, Sell, Rent, Lease
– one call does it all from GMI

Do you own an old counter and want to ‘move up’ to a NEW LS6500 Series LSC system? 
Your old LSC is eligible for the GMI “Trade-In Trade-up Program”  
GMI can also assist with legal and proper environmental disposal of your old counter 
Ask your sales representative today how to save BIG on an updated or NEW Liquid Scintillation system from GMI !


Beckman LS 6500 Scintillation Counter Specifications

Resolution 32,768 channels, 0.06 keV per channel
Reproducibility +/- 1% Counting Efficiency
Maximum Count Rate Total Singles: 26 x 10^6 CPM
3H Window: 10 x 10^6 CPM
14C Window: 13 x ^6 CPM
Above 14 C Window: 5 x ^6 CPM
Power Requirements 120 / 240V / BTU HR with 50/60 Hz
Instrument 3A / 1.5A / 1230
Temperature 7.5A / 3.8A / 3060
Inrush Current 5A at 120V, 2.5A at 240V
Power Failure Recovery System returns to a disrupted Automatic Count with fully charged battery
Dimensions (W x H x D / Weight) Instrument: 91.4 x 67.3 x 80 cm / 210 kg
Refrigeration Acc.: 35.5 x 56 x 73.7 cm / 45.4 kg
Printer: 39 x 10 x 30.5 cm / 5 kg
Ambient Temperature Range 15 - 35'C
Maximum Relative Humidity 85%
Ambient Temperature Range 15'C to 30'C
Maximum Pull Down Time 8 Hours
Set Point 1 12'C +3'C
Set Point 2 15'C +3'C
Set Point 3 18'C +3'C
Efficiency 2H: >/= 60% in a wide window
14C: >/= 95/5 in a wide window

GMI Certified Service means:

Healthy operation of your instrument

Helping to ensure the quality of your results

Lowering cost of ownership through service agreement

Prolonging instrument serviceable life

Safe Operation of your equipment

Increases productivity and minimizes revenue loss

  • Instrument Evaluation Services
  • Contract Refurbishing
  • Relocation Services
  • Equipment Finder Service
  • Training Courses
  • Depot Repair
  • Instrument Decommisioning & Disposal Services
Service Agreements

Preventative Maintenance Visit
('tune up', including cleaning, lubrication, and adjustments)
1 Service Visit
Service Visit 1PM
1 Service Visit
1 2
Parts and Labor    

Discounted Parts
Discounted Labor (As needed)

Lab Equipment Replacement Parts & Accessories

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We Proudly Provide Instruments & Service To the Top Scientists In the World...

  • UEL
  • Memoarial Sloan Kettering
  • Stanford University
  • Exxon Mobil
  • University of Texas
  • University of Florida
  • Washington University in St. Louis
  • University of Minnesota
  • National Institute of Health
  • Catalysta
  • Los Alamos
  • National Institute Of Standards and Technology
  • Harvard University
  • Cornell University
  • NASA
  • Environmental Protection
  • Sigma Aldrich


Your trusted source for new, factory clearance & certified pre-owned lab instruments since 1995.

  • We routinely save discerning laboratories 30-80% with our recertified pre-owned and factory clearance instrument offerings.

  • Quality? ISO 9001:2008 certified means we remove 100% of the risk in buying ‘used’ laboratory equipment.

  • Warranties from 90 days to a year as well as multi-year service agreements are available.