The T80 is a high performance double beam spectrophotometer available with a fixed (2nm) or variable (0.5, 1, 2, 5nm) spectral bandwidth.

The T90+ is a high performance double beam scanning spectrophotometer with a variable (0.1, 0.2, 0.5, 1.0, 2.0, 5.0nm) spectral bandwidth.

The T92+ is a high performance doublebeam spectrophotometer with a variable spectral bandwidth from 0.1-5nm,selected by a continuous variable slit.