QUANTOM Tx™ Microbial Cell Counter

No more waiting days to count CFUs. In less than 30 seconds, the QUANTOM Tx™ scans up to 10 fields of view to produce accurate single bacterial cell counts. The advanced software can account for the varying shapes, sizes, and arrangements of different bacteria.

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Although smaller and simpler than their eukaryotic counterparts, bacteria are an incredibly diverse group of organisms that come in multiple shapes, sizes, and arrangements. Colony counting is a highly variable and unreliable, as it is only an estimate of the viable cells present. Even expensive flow cytometers and laser scanning cytometers register each particle, single or clustered, as a single event. The QUANTOM Tx™ Microbial Cell Counter is an image-based, automated cell counter that can detect individual bacterial cells in mere minutes. Its novel bacteria-optimized cell detection software can count individual bacterial cells in even the tightest clusters.

Results In Minutes, Not Days
Minutes to results
No culturing required
Accurate Results
Objective and no user-to-user variability
No estimating based on colony forming units or turbidity
Single Bacterium Detection
Regardless of cell shape, size, or arrangement
Advanced bacterial cell counting software
Total & Viable Cell Counts
Fluorescence stains for accurate cell detection
Multiple images captured and analyzed
The Software That Changes Everything.
Innovative Counting Process Ensures Accurate Counts
QUANTOM™ Total Cell Staining Dye easily permeates both gram positive and gram negative bacteria to stain both live and dead cells. QUANTOM™ Viable Cell Staining Dye efficiently labels viable bacteria.
Stained cells are mixed with our bacteria-optimized loading buffer, loaded into QUANTOM™ M50 Cell Counting Slides, and spun in the QUANTOM™ Centrifuge to immobilize and evenly distribute the cells throughout the counting chamber to ensure accurate cell counts.
The QUANTOM Tx™ captures up to 10 high resolution images and counts the cells in each. The highly sophisticated software can distinguish individual cells in various arrangements such as tight clusters or in sequence to produce accurate and reliable total bacterial cell counts.
What Do Our Customers Have To Say?
Kok Looi

Great machine with simple precision that's reliable.
Overall, QUANTOM Tx is user-friendly, simple, quick, but accurate and accountable. The whole measurement for total and viable counts can be optimized to as short as 30 min for the entire process. The results are reliable and accountable. I'd recommend this for all cell biology work. Compared with traditional cell plating which requires overnight incubation for viable results or total cell count by using the Neubauer method. With QUANTOM Tx, we can have reliable results and reduce the total process time.

Nicolas Kong

Overall, we are very satisfied with the platform. It is a mainstay of our workflow.
We use the Logos QUANTOM Tx (QTx) to enumerate various species of bacteria grown in liquid media. Prior to purchasing the QTx, enumeration was done via the spread-plate method. The rapid quantitation afforded by the QTx allows us to have a result in as little as 30 minutes, compared to 3 days for the spread-plate method. We have also found the QTx useful for determining the proportion of live/dead cells within a sample. The simplicity and ease of use of the QTx allows for rapid training of new operators and excellent repeatability. In addition, Logos' after-sales service has been exceptional.

Servatus Ltd

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Where The QUANTOM TX™ Has Been Cited

Potassium Lactate as a Strategy for Sodium Content Reduction without Compromising Salt-Associated Antimicrobial Activity in Salami.

2021. Muchaamba F, Stoffers H, Blase R, Ah UV, Tasara T. Foods 10(1):114.

Early Cytokine Induction Upon Pseudomonas aeruginosa Infection in Murine Precision Cut Lung Slices Depends on Sensing of Bacterial Viability.

2020. Kolbe U, Yi B, Poth T, Saunders A, Boutin S, Dalpke AH. Frontiers in Immunology 11:598636.

Low-Carbohydrate Tolerant LAB Strains Identified from Rumen Fluid: Investigation of Probiotic Activity and Legume Silage Fermentation.

2020. Kuppusamy P, Kim D, Soundharrajan I, Park HS, Jung JS, Yang SH, Choi KC. Microorganisms 8(7):E1044.

Potential clinical application of an automated fluorescent microbial cell counter in the detection of urinary tract infection.

2020. Phillips LE, Verma S, Surapaneni BK, Dutta SK. Journal of Clinical Laboratory Analysis 4:e23334.

Probiotic Characteristics and Antifungal Activity of Lactobacillus plantarum and Its Impact on Fermentation of Italian Ryegrass at Low Moisture.

2020. Muthusamy K, Soundharrajan I, Sriseharam S, Kim DH, Kuppusamy P, Lee KD, Choi KC. Applied Sciences 2020, DOI:10.3390/app10010417.

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2022-04-07 | 735.19 KB

Logos Biosystems Products

2022-04-07 | 2.14 MB

Implementing New Standards in Metagenomics and the Extreme Microbiome Project

2021-07-28 | 955.32 KB

Quick Start Guide

2019-06-17 | 496.74 KB


2019-06-17 | 812 KB

Cell DB
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Ordering Information
Cat #ProductQty
Q10001QUANTOM Tx™ Microbial Cell Counter1 unit
Q10002QUANTOM™ Centrifuge1 unit
Q12001QUANTOM™ M50 Cell Counting Slides, 50 Slides1 box
Q12002QUANTOM™ M50 Cell Counting Slides, 500 Slides10 boxes
Q13501QUANTOM™ Total Cell Staining Kit
– QUANTOM™ Total Cell Staining Dye (1 x 0.25 mL)
– QUANTOM™ Total Cell Staining Enhancer (1 x 0.5 mL)
– QUANTOM™ Cell Loading Buffer I (2 x 1 mL)
1 kit
Q13502QUANTOM™ Viable Cell Staining Kit
– QUANTOM™ Viable Cell Staining Dye (2 x 50 µg)
– Dimethyl Sulfoxide (2 x 1 mL)
– QUANTOM™ Viable Cell Dilution Buffer (1 x 20 mL)
– QUANTOM™ Cell Loading Buffer I (2 x 1 mL)
1 kit
Q13102QUANTOM™ Calibration Beads1 x 0.5 mL


QUANTOM Tx™ Microbial Cell Counter
Physical CharacteristicsInstrument type
Benchtop bacterial cell counter
10″ capacitive touchscreen, 1280 x 800 pixels
43.3 × 31.0 × 22.5 cm (17.0 x 12.2 x 8.8 in)
10.8 kg (23.9 lb)
Technical SpecificationsCell detection method
Automated fluorescence microscopy
Processing time
~ 1 minute (to capture and analyze 20 images)
Sample concentration range
1 x 105 to 1 x 109 cells/mL (optimal: 5 x 105 to 5 x 108 cells/mL)
Cell size range
0.3-50 µm
Sample volume
Loading volume: 5-6 µL, measuring volume: 0.17 µL (20 images)


QUANTOM Tx™ Centrifuge
Physical CharacteristicsInstrument type
Benchtop centrifuge
21 x 21 x 22 cm (8.3 x 8.3 x 8.7 in)
5.64 kg (12.4 lb)
Technical SpecificationsMaximum capacity
Up to 8 QUANTOM™ M50 Cell Counting Slides
Maximum RPM
4,000 RPM
Safety features
Safety lid lock, lid drop protection, automatic door release
Electrical requirements
110 V, 60 Hz, 1 A or 220-240 V, 50/60 Hz, 0.5 A


QUANTOM Tx™ M50 Cell Counting Slides
Physical CharacteristicsMaterial
Poly(methyl methacrylate) (PMMA)
25 x 75 x 1.65 mm
Chamber volume
5-6 µL