procurement uv-vis spectrophotometer for cwa ( w and s ) -i division , description ( make : hach / thermo fischer scientific / agilent / perkin elmer / wtw / lovibond ) • spectrophotometer will be double beam ( uv-visible ) / reference cell, it is will have high resolution touch screen user interface. the spectrophotometer must be capable of operating through computer also., there will be 8-position cell changer with switchable turret, it will have onboard methods, reporting and data export, it will be networking capable and will have wi-fi adaptor, it is capable of open-lid operation., there will be room light resistance., it will have sipper ( optional ) , it must accommodate cells up to 100 mm path length, there will be 8-position cell changer with switchable turret, it must have optional facility for 4-position cell changer ( long path cells ) and peltier-thermostat single cell holder ( 20 °c - 60 °c ) • detector type : dual silicon photodiodes • display : 7-inch colour touch screen, high definition, 800 × 1280 pixels, photometric : ±0.002a at 0.5a accuracy: ±0.004a at 1.0a, instrument : ±0.008a at 2.0a, wavelength accuracy : ±0.5 nm, baseline flatness : ±0.002a, compartment:8-position cell changer ( standard ) also accommodates ( optional ) :peltier thermostat cell holder ( 20-60 °c ) sipper accessory ( optional ) , drift : ( at 500 nm after 1 hour warmup ) <0.0005a / hr, electrical requirements: external ac to dc converter. voltage and frequency ( hz ) selected automatically, 100–240 volts, 50–60 hz., keypad : touchscreen, lamp -xenon flash lamp ( >5 years typical, 3 years guaranteed ) , noise - ( rms at 500 nm 60 consecutive measurements ) =0.00020a at 0a at 260 and 500 nm, =0.00030a at 1a at 260 and 500 nm, =0.00040a at 2a at 260 and 500 nm, optical design-double beam, photometric display -3a to +5a, photometric range –2a to +3.5a, photometric repeatability ±0.001a at 1a measured at1.0a at 546 nm, spectral bandwidth- 2 nm, stray light-< 1.0%t 198 nm ( kcl ) , <0.05%t at 220nm ( naci ) , <0.03%t at 340 nm ( nano2 ) , wavelength data interval - 0.1 nm, 0.2 nm, 0.5 nm, 1 nm, 2 nm, 5 nm, wavelength range -190 nm – 1100 nm, wavelength repeatability -< ±0.2 nm, wavelength scan speed-slow, medium and fast - up to 1600 nm / min, printer-capable to connect with printer, computer operation -the spectrophotometer can be operated from compatible computer and software. computer and operational softwareto run spectrophotometer will be a part of the spectrophotometer., connections-single usb-a supports flash memory devices for method and data storage • duplex usb-a on side supports connection to acomputer running optional remote control software, keyboard, mouse • export data to network or pc via usb, ethernet, or wi-fi usb adaptor, available print via usb, ethernet or wi-fi usb adaptor available warranty3 year