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User Feedback on Cellometer K2

We love the Cellometer K2 system as it can yield accurate cell counts and its performance is superior to that of the Countess II FL Automated Cell Counter. Furthermore, the technical support we have gotten from our Nexcelom representative is outstanding. We also love the fact that the K2 software upgrades are free! Overall, our experience with the K2 instrument and Nexcelom is excellent.
The Cellometer K2 is more accurate than any other cell counter we have tried. We love to use it for our single cell sequencing platform.
The Cellometer K2 is workable and easy to use for a lab setting. We already have more than four K2 cell counting instruments. This is our preferred instrument to use by far!
The Cellometer K2 is fast and very accurate. We love that the dye is nuclear to ensure accuracy of the cell counts. Sure beats counting by hand! - Amanda Clark, Biomere
The Cellometer K2 allows me to do several counts at once and provides me with an accurate and reliable viability average. Our local Nexcelom representative was amazing and made the transition process extremely simple!
I love the Cellometer K2! I use it nearly daily to count hepatocytes and it is practically effortless! What a great consistent counting instrument.
Overall, we are very pleased with the Cellometer K2. It has saved us time and space, especially during lengthy experiments.
The accuracy of the Cellometer K2 has with an over abundance of cells is great as well as the time it saves each tech to count them!
We have been using the Cellometer K2 for months. It always gives us great reproducibility between cell counts and has increased our throughput drastically! Not only is it much faster than using the hemacytometer, it is much more reproducible between operators.
The Cellometer K2 is great and easy to use. It gives clear images quickly. We have been using it for a couple years and never have any problems with it! - Solaema Taleb, IUPUI
The Cellometer K2 is great! It has been a pleasure working with Nexcelom's group. All questions have been answered in a timely fashion and customer service has been excellent! - Martin Lagrange, Wuci AppTec
I am working with suspension cell culture, and I need to have precise density and viability of my cells. The precision with the Cellometer K2 is great, very reliable! It takes much less sample and consumes less time! Technically also, the cell counting is very straightforward. There is a much lower chance of errors than with manual counting with hemacytometer. - Shyamtanu Datta, UT Southwestern Medical Center
The Cellometer K2 is easy to use and great for counting cells that are prone to clumping together. It can't cell culture without this machine! - Michael Lee, City of Hope
We use the Cellometer K2 routinely for a number of cell-based assays. It is very easy to use and gives accurate cell counts!
The Cellometer K2 is great because it only requires 20 uL of sample for cell counting, which is important for when we need to perform counts and are limited with a small number of cells. My lab uses CD34+ cells from patients, so the cells we have are quite costly. The K2 counts are accurate and reliable, and it is quick and easy to count the cells using AOPI because the reaction occurs quickly. Thanks Nexcelom!
We initially purchased the Cellometer Auto 2000 for our tissue culture cell counting and we were so pleased with it that when the time came to expand our tissue culture room, we purchased a second instrument, the Cellometer K2! The ease of use and the ability to quickly generate live/dead information has been extremely helpful for all our tissue culture needs.
I use the Cellometer K2. I like the fact that it is really easy to use and that you can program different cell types to be sure not to miss your population (sizes vary so much between cell types). Before I started to use this machine, I was mainly counting my cells with a hemacytometer coupled with Trypan Blue staining to check viability. I am now using routinely the K2 with AOPI for the same purpose. I did the comparison several times between the two methods and the results seem to be concordant. The K2 is really easy to use and really fast! I also like the fact that you can determine right away the proper volume to take for a desired number of cells directly with the software. No more struggle for my students! I highly recommend this machine to everybody who works with students or a lot of different cell types for it is easy to use, robust and fast.
We purchased a Cellometer K2, and all members in our lab love it! It is more accurate and efficient! With auto-counters from other vendors, we always got very confused counts, especially for PBMCs. With the K2, we always get consistent and reliable results! - Mengling Liu, HD Biosciences
We used to use the ViCell to count our cells, but now we use the Cellometer K2. This system is much quicker and requires less of our cells for counting. The system also has a smaller footprint which is nice!
The Cellometer K2 has allowed us to speed up our experiments with PBMCs by giving us quick and accurate cell counts! Our experiments require precise cell densities in order for our data to be reliable and usable for our clients.
The Cellometer K2 has made cell counting easier and more cost effective. Initially, counts were compared from the K2 to the Flow Analyzers and we find they are comparable, but using the K2 requires less time and sample size!
The Cellometer K2 has helped with the counting of primary hepatocytes. It has made it much easier for accurate counting of cells!
The Cellometer K2 is very fast and efficient. It has turned what used to be a hassle in the lab into a breeze! - Andrew Schade, KCAS
The Cellometer K2 really allows for my experiments to run smoother and quicker. Due to the automated counting, I am able to count all my samples in a fraction of the time!
My lab uses the Cellometer K2 to count splenocytes for our experiments. It is much faster and more convenient than manual cell counting!
The Cellometer K2 makes counting cells very easy and efficient! Going from a manual hemacytometer to the Cellometer saves us a lot of time in the lab!
We use the Cellometer K2 almost every day and my work is so much faster now! My counting is much more accurate and I also improved my cell cycle experiments that are easier and faster thanks to the Cellometer! - Rossella Titone, UT Southwestern Medical Center
The Cellometer K2 makes counting a large number of samples extremely fast! Its fluorescence capabilities makes it a must-have in any biology lab! - Melvin Thomas, UTA
I work with cancer cell lines and some of them grow in clumps making it difficult to count cell numbers. However, by using the Cellometer Mini I am able to get an accurate cell count! I also use the Cellometer K2 for apoptosis assays which makes light of a lot of work, since traditional flow cytometry is time consuming and requires a high number of cells.
The Cellometer Auto T4 and Cellometer K2 make it really easy to obtain cell numbers and makes counting cells less of a task! Basically makes life easy! - Aparna Swarup, Wuxi AppTec
My principle application is the routine counting of peripheral blood mononuclear cells (PBMCs). Our laboratory supports phase one cancer research and PBMCs are the preferred surrogate tissue to assess chemotherapeutic activity for time course studies. We have been measuring PBMCs using a Coulter Z1 particle counter. Unfortunately, red blood cells (RBCs) significantly interfere with this instrument and vary widely between patients. Knowing that pre-analytical steps are often considered to be less important than the ensuing technical aspects of bioanalytical methods and are often insufficiently investigated and thus, underestimated. Also, realizing that pre-analytical variables can significantly impact the reliability of our biomarker measurements; and that standardizing specimen collection, handling, processing, and storage methods definitely minimize pre-analytical errors. The Cellometer K2 offers a solution to the inaccuracy of RBC interference without a Coulter counter and is greatly preferred to the time-consuming manually counting PBMCs with a hemacytometer. - Ken Czambel, The Universitry of Pittsburgh Cancer Institute
I have the Cellometer K2, and this is my fourth instrument from Nexcelom. It is a great workhorse! The machine has been in use constantly for 2 years now with no problems. - Doris Wiener, Lion Biotechnologies
The Cellometer K2 significantly expedites the process of cell counting. I can now compare growth kinetics between large amounts of samples.
The Cellometer K2 has been integral for our continued tissue biorepository success. We have been able to really distinguish between varying cell types.
The Cellometer K2 is definitely in the line of simple to use cell counters. The K2 has sped up our cell counting process enormously. We were accustomed to using the manual method of the hemacytometer, which was a very tedious process. The Cellometer K2 is able to provide us with cell counts within thirty to forty seconds!
The Cellometer K2 is one of the most useful machines I use! It quickly and accurately counts cells for both quality control and fresh orders of PBMCs has increased output.
The ease and efficiency of the Cellometer K2 has decreased the amount of time spent counting cells using the hemacytometer.
The Cellometer K2 has drastically changed our work flow in the lab. We are able to gather cell counts in minutes rather than waiting overnight for colonies to grow on plates. It also cuts down time in the prep of plating and error in plating/counting. The amount of time that the machine has saved us is incalculable - it has allowed us to move projects along much more quickly and with confidence. - Cami Anderson, Synlogic
The Cellometer K2 is always reliable, we use it daily for our cell culture counting and viability assays. The one time we had some questions about it, Nexcelom's customer service team knew exactly how to fix it. Great service!
With the Cellometer K2, I like the ability to fine tune individual parameters to modify cell counts if there is an error. The overall use of the machine is great. It has allowed me to gather data in a more high throughput fashion.
I am currently using the Cellometer K2 in our lab, mostly to count T cells, PBMCs, and tumor cells. I use them for cell culture, and later the cells are used for further assays like ELISA and FACS. The instrument is very accurate, especially with AOPI.
We have been using the Cellometer K2 for about 2.5 years. It is very convenient and robust. The service and technical support are also great. -Yalin Guo, ImmuNext Inc
The Cellometer K2 instrument is a simple, quick, visual cell counting platform. We love the clear images and easily discerned confirmation that the cell count data is real because you can see the count for your own two eyes. It has allowed us to move away from difficult flow cytometer and subjective hemocytometer methods.
The Cellometer K2 has helped us reduce our counting time when we have many samples to count. Side-by-side comparison with manual counting has verified its accuracy. It is easy to use with no routine calibrationso startup time is not an issue.
Transitioning to the Cellometer from our previous method using Flow Cytometry, has been smooth and efficient with the help of the great team at Nexcelom. The software is very user friendly and the instrument is maintenance free. I would highly recommend the Nexcelom Cellometer K2 to other facilities looking to use image-based cell counting systems.

More Praise for Cellometer

Makes cell counting fast and easy! Disposable slides are so much easier to use than a conventional hemacytometer.

The Cellometer is very useful - it saves us an immense amount of time. We use it every time we plate. Thanks for a great product!

The Nexcelom Cellometer increased the amount of cell samples I could count in a day, increasing the amount of data points I could derive. Additionally the sheet of viable cells/non-viable cells, cell diameter etc. was extremely helpful. I used the Cellometer for counting SHSY-5Y cells. - Kaeli Freeborough, Lake Erie College of Osteopathic Medicine

I love the simplicity and user-friendliness of the instrument. I learned how to count cells on a hemocytometer, which was tedious and required too much precious time. Not to mention, the hemocytometer and coverslips were extremely easy to break which, added up to a lot of replacement costs. With the Cellometer disposable slides I don't have to worry about any of that, and the computer does the counting and math for me. In addition, I love being able to adjust the settings so that it can count smaller cells such as immune cells. Sometimes, we have samples that have immune and/or cancer cells mixed in with red blood cells, and being able to gate out the rbc's through size is a convenience that I am extremely grateful for.

With Cellometer it is really easy and quick to visualize our cells and perform counting. Cellometer also enabled us to read RFP and GFP Taransfected cells very quickly - Neha Bhise, University of Florida

We are using Cellometer to do cell count and RFP, GFP readings. It is very easy to find transfection efficiency of transfected cell lines using Cellometer. Saving time in cell counting also. Very fast and gives dilution calculations, that is also a very good tool. - Lata Chuhan, University of Florida

The Cellometer has been one of the best equipment buys in a long time.  Very efficient and accurate for our purpose and it fits perfectly in our TC room and on top, it is very easy to use.  The lab is very happy with the machine.

The Cellometer instrument has made counting cells and assessing viability fast, accurate and very easy to do. I am able to keep better track of my cells because of it

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