tender for supply of uv-visible spectrophotometer with integrating sphere , uv-visible spectrophotometer with integrating sphere , • must be a scanning spectrophotometer covering the wavelength range 190-1100nm • the system should be of a double-beam, 50/50 beam-splitter design • the spectrophotometer must have variable spectral bandwidth between 0.5 and 20nm • the instrument should have specification to 4a for wide dynamic range • the optical system must be sealed and quartz-coated • silicon photo diode detectors for sample and reference beams • it is desirable that the source lamps are pre-aligned and user replaceable • a stray light of=0.01%t220,340&370 is a must • wavelength accuracy at least ±0.1nm is essential • photometric accuracy of ±0.003 at 1a and ±0.005 at 2a is necessary • the instrument must have a stability of at least 0.0003a/hour • photometric noise at 700nm (0a) must be less than 0.00005a • the system must have pc control via a usb interface • iqoq must be available with the option to use standard tests as specified in the pharmacopoeias during operational qualification (oq) • self-test during instrument start-up providing both visual test sequence and external indication when instrument is ready for operation • the ability to correct for blanks in real-time is essential. this necessitates 2 sample holders in the sample compartment, one for the sample and one for the reference. • the sample compartment must be completely sealed to prevent accidental spillages into the optical system • optics should be contained in a sealed enclosure for extended life • must provide extended warranty and service contract options • accessories must have auto-align capability and software recognition • 50 mm integrating sphere should be included with the system for solid samples like powders, films etc. a powder sample holder also should be available. • 1 pair of quartz cuvette to be included. • suitable pc with latest windows os should be provided. • service engineers details stationed in kerala should be furnished . training certificate is mandatory. • an on-site, parts and labour warranty of at least 24 months is essential •branded desktop pc (i5 / 16gb/ 512gb nvme, monitor, k/m)