item rate contract for supply and installation of turbidity meter laboratory instruments and equipments at departmental water quality testing laboratories in uttarakhand item rate contract for supply and installation of turbidity meter laboratory instruments and equipments at departmental water quality testing laboratories in uttarakhand , supply and installation of following laboratory instruments/ equipments at departmental water quality testing laboratories (annexure-7) as per enclosed specifications mentioned in this tender document. , turbidity meter , annual maintenance charges for following instruments for five years after lapse of guarantee/warrantee period from the date of installation at destination laboratories in any part of uttarakhand state with all materials, labour, t&p etc. required for maintenance. turbidity meter , for first year , for second year , for third year , for fourth year , for fifth year