procurement of bench top ph-conductivity meter dual channel for cwa(w&s)-i division. procurement of benchtop ph-conductivity meter dual channel for cwa ( w and s ) -i division , description make: lovibond, thermo orion, hach, wtw, horiba, toshcon, consort, metrohm, atl specifications for benchtop ph-conductivity meter dual channel it will be dual channel instrument for measurement of ph and tds. the measurement may be performed at the same time and simultaneously. each channel has independent and dedicated channel hardware with display screens. the values may be displayed simultaneously on the screen with temperature and date-time stamp. there will be corrosion resistant bnc connectors for electrodes. the electrodes and channels must be designed for interference free measuring when measuring ph / orp / ion and conductivity in the same solution. it will be 5 point calibration for ph and 3 point calibration for electric conductivity. the multimeter can be connected to pc via usb or rs232 port. it will be supplied with compatible software and communication protocol. the multimeter will have following features; 1. stability indicator 2. freezing display with hold key 3. selectable resolution for more stability in measurement of mv and ph 4. range lock for conductivity measurement 5. capative compensation to eliminates the capative component of the electrode and cable. data log: 10, 000 plus ph range -10.000...+20.000 ph resolution 0.001 ph accuracy 0.1% ± 1 digit calibration 1...5 points buffers 11 pre-programmed 5 user specified temperature compensation -5.0...+105.0°c iso-ph 6.000 8.000 ph slope 80.0...120.0% zero point ( eo ) ±999.0 mv selectable resolution conductivity range ( cc dependent ) 0...2000 ms / cm resolution ( cc dependent ) 0.001 accuracy 0.5% f.s. of range calibration 1...3 points standards 3 pre-programmed and users specified cell constant ( cc ) 0.07...13 cm-1 temperature compensation0.50c off reference temperature 20°, 25°c temperature coefficient natural waters ( en27888 ) tds range 0 100.0 g / l resolution 0.01 mg / l electrode: ph and conductivity electrode ( plastic / epoxy ) warranty: 2 years for multimeter