supply of equipments and instrument for water testing laboratory estimate-1 , supply of equipments and instrument for water testing laboratory-1 , nephelo turbidity meter model no . 135 micro-controller based extra electroderange ( 1 ) 0-1 ntu ( 2 ) 0-10 ntu ( 3 ) 0-100 ntu ( 4 ) 0-1000 ntu 2 year warranty note make 3 year a m c after 2 year warranty . , uv-visible spectrophotometer model no . 2205 double beam micro-contrler based optics with aberration corrected holographic concave grating with 1200 lines/mm bazed at 275 nm . wavelength range 190-1100nm , wavelength accuracy +_ . 3 nmincluding 2 year warranty note make 3 year a m c after 2 year warranty .