Complete Product Description

   
When you need performance, sample capacity and throughput, choose TopCount. The TopCount NXT Gamma Counter delivers high efficiency, low background counting of beta, gamma, and glow luminescence samples in 24-, 96- and 384- well microplates and microvials.




The TopCount’s performance is a result of its unique counting technology. A patented single photomultiplier tube (PMT) time resolved counting method results in virtually crosstalk-free counting when used with opaque plates. High sensitivity is attained by using TR-LSC technology, a method that discriminates between background and true counts by analyzing the decay period of each scintillation event. The results are high signal-to-noise ratios, superior sensitivity, and linearity over a wide dynamic range.




TopCount’s fast photon counting and temperature controls make it an ideal counter for luminescence assays. Its unique circuitry enables counting of more photons per second than even most dedicated microplate luminescence detection systems. Plus its small PMTs have very low intrinsic backgrounds. The result is high signal and low background in applications sometimes difficult to measure optimally with other counters, especially very small, low count rate samples.




Load TopCount’s external stackers with up to 40 microplates and it will count them completely unattended. For luminescent samples, throughput can be more than 50,000 samples/day. You can load new plates and unload counted plates without interrupting the counting process!