procurement of 3 channel portable multi-meter for do , ph , conductivity , tds , salinity , temperature as per specification and boq . make wtw , hach , thermoscientific , lovibond , specifications for 3 channel portable multi-meter for do , ph , conductivity , tds , salinity , temperature the instrument shall be portable do multi parameter with facility to measure dissolved oxygen , ph , orp , conductivity , turbidity . the instrument will be supplied with rugged electrodes/sensors for do , ph and conductivity optional features required ( if required ) : 1 . wireless data transfer 2 . depth measurement technical features display: large graphic lcd the display will provide additional following information time , date , sample id , user id , calibration information , temperature , etc . user administration setup as per glp/gmp guidelines meter should have auto read & continuous display facility . the instrument will have internal memory up to 10000 automatic & 500 manual point data logging with time and date . interface: usb-a , mini usb-b power supply: 4 nimh re-chargeable batteries ( aa type ) , usb technical specifications: make:- wtw , hach , thermoscientific , lovibond