Learn how to use this product The disposable QUANTOM™ M50 cell counting slides are compatible with the QUANTOM Tx™ Microbial Cell Counter. The QUANTOM™ M50 cell counting slides are for fluorescent cell counting and are made with optical quality materials with ultra-low autofluorescence. This allows for optimal fluorescence detection and maintaining the highest cell counting accuracy. Lastly, with no mess or cleanup, these slides allow for convenient cell counting.