tender for purchase of equipment , spectrofluorometer , • optical system and monochromator: optical design: single/double monochromator using holographic concave grating - excitation & emission range: zero order, 200 nm to 750 nm (or) better - wavelength accuracy: should be at least +/-1.5 nm (or) better - wavelength repeatability: +/- 1.0 nm (or) better - spectral bandwidth (slits): variable and minimum should be 1, 2.5, 5,10,20, l5, l10nm on both excitation and emission monochromators - high-order diffraction removal: automatic software-controlled higher-order diffraction cut filters must be provided as standard on both channels. • light source and detection light source: high-stability, long-life 150 w ozone-free xenon annual rate contract lamp with shielded lamp housing (rated lifetime ≥ 3,000 hours).- validation standard: built-in / integrated mercury (hg) lamp for automatic wavelength calibration and instrument validation.- photofading protection: automatic software-controlled shutter system to protect sensitive biological or chemical samples from photobleaching during idle periods. - detectors; excitation channel: silicon photodiode for real-time reference monitoring. emission channel: high-performance, high-sensitivity photomultiplier tube (pmt). sensitivity (signal-to-noise): water raman peak s/n ratio ≥ 8,000 : 1(rms) • performance & measurement capabilities -wavelength scan speed: 10 to 20,000 nm/min (or better). - slew speed: 30,000 nm/min or better. - photometric range: -10,000 to +10,000 or wide dynamic range (≥6 orders of magnitude). software package: windows 10/11-compatible control & processing software supporting: 2d & 3d excitation-emission matrix (eem) scanning, fixed wavelength & multi-wavelength kinetics / time-course decay, synchronous scan mode (constant wavelength and constant energy), relative quantum yield calculation, absorbance measurement & automatic spectral correction, instrument self-diagnostics and auto-accessory recognition • sample compartment & accessories - liquid sample handling: standard 10 mm rectangular cell holder assembly. must include 1 pair (2 nos.) of quartz fluorescence cuvettes (10 mm path length, 3.5 ml volume, 4-sided polished windows) with ptfe stoppers/lids. solid/powder sample handling: dedicated solid/powder sample holder for thin films, powders, and opaque substrates. temperature control: provision/capability to integrate a peltier-based thermostatted cell holder system. expansion options: system must support future upgradeability to micro-volume cell holders (up to 5μl). • warranty & delivery terms: warranty: minimum 3-year comprehensive warranty on the complete system including light source and accessories from the date of successful installation. installation & training: free on-site installation, demonstration, and user training by factory-trained service engineers.