supply of lab instrument for district laboratory district raisen , conductivity tds meter 0 . 1 us to 100 ms 6 decade range+ 1 pencent of full scale + digit 0 . 001 us tds range 0 . 1 ppm to 100 ppt 6 decade range + 1 percent of full scale + 1 digit temp 0 to 100 centigrade ( auto manual ) cell constant acceptable from 0 . 1 to 5 . 0 display 7 digits 75 segment led 3 digits for temp co s4 digit with standard accessories or 3 year amc . make- remo / navyug / systronic or equivalent . , ion meter electrode ( fludride ) make- orion / thermo , nephelo turobidity meter range 0 to 1 ntu o to 10 ntu o to 100 ntu and o to 1000 ntu plus minus 1 . 5 percent offsdin 0 to 500 and plus minus 2 percent ffsd in 500 to 1000 std photodiode led lcd 2 line 16 character alphanumeric for malin std . solution calibration 8 dta and 00 to staredin memry flat bottom test tube 4 nos and light shiedld with 3 year amc . make merck systronics eutech . merck / systronics / eutech or equivalent .