Tender For procurement of required instruments, ph meter -digital, 4 led or lcd display, bench model, range 0-14 ph, accuracy sensitivity 0.01 ph, with automatic temperature compensation with combined glass electrode, electrode holder, 3 point calibration for ph, mv- 0 to 1999 mv, slope-90% to 110%, 220v ac operated. warranty minimum 1 year., turbidity meter-range 0-2000 ntu, resolution 0.01 ntu for 0-100 ntu, 0.1 ntu for 100 1000 ntu, 1 ntu for 1000 2000, repeatability 3%, source-projector lamp, detector-photodiode., calibration up to 3 points, including sample vials. warranty minimum 1 year., electrical conductivity/tds meter-microcontroller based electrical conductivity, digital 4 inch led or lcd display, bench model, different measuring ranges 0-20, 0-200, 0-2000, 0-20000, 0-200000 micro mho per cm, with automatic temperature compensation arrangement, resolution-0.01 micro s, accuracy 1% mid scale, conductivity cell of 0.1 cell constant, with holder and clamp, tds range 0-200ppt, ac operated. calibration upto 3 points. warranty minimum 1 year., flame photo meter-dual channel simultaneous display for both na & k, capable of measuring 4 elements with single aspiration i.e. na, k, li and ca with filters for na, k, li and ca, 3 digit, full scale sensitivity na-2 ppm, k-1 ppm, li-1ppm and ca-30 ppm, operated on lpg supply, with compressor. warranty minimum 1 year., spectro photo meter-digital visible spectro photometer, wave length range 340 to 900nm, bandwidth :10nm, wavelength accuracy : 5nm, wavelength setting through dial, wavelength readout: 5nm, photometric accuracy : 0.005 abs at 1.000 abs, photometric resolution: 0.1% t, 0.001 abs, photometric readout: 4 digit seven segment led, source: tungsten halogen lamp, grating based mono chromator with 600 lines/mm, power : 230 v, 10% 50 hz, detector: wide range silicon photoiode, sample holder : single position 10 mm cuvette holder, min. sample volume : 1 ml in 4 ml cuvette, measuring mode: automatic - % transmittance, absorbance, concentration, accessories: two glass cuvettes, temperature: capable to operate in room temperature. warranty minimum 1 year.