TriStar2S LB 942 with HTRF®-Technology
The successful Berthold Technologies multilabel reader TriStar2 now takes the next step. Right after the recent introduction of the monochromator technology, the TriStar2 now also supports time resolved fluorescence energy transfer assays (TR-FRET, HTRF®). FRET is an excellent technology to monitor specific molecular interactions with high sensitivity in homogeneous phase. The effect relies on the distance-dependent transfer of the excitation energy from a donor-dye to an acceptor. Hence, two interacting partners complementary labelled with the respective dyes, induce FRET once they are tightly bound to each other and the red shifted acceptor emission is observed even if the donor is exclusively excited. With the time resolved FRET-technology now available for the TriStar2
applied for FRET assays featuring an acceptor dye with long lived fluorescence decays, such as e.g. 
the CisBio HTRF®-kit. After excitation of the donor with a short light-pulse, the acceptor emission is 
only recorded after a tuneable time-delay of 50-300μs. This way, exclusively the acceptor emission 
is recorded and potential background emission, which typically decays with time constants in the 
nanosecond time regime, is effectively suppressed. 
Thanks to the integration of the TR-FRET modality, the TriStar2 tool for every laboratory which expects best sensitivity, highest flexibility and outstanding quality at an affordable price. The TriStar2S offers the following measurement options:
-Time Resolved Fluorescene (TRF)
-Absorbance spectral scanning (UV-VIS)
-Time Resolved FRET (TR-FRET/HTRF)
-Fluorescene excitation scanning