supply of 1). drb 200 : digital reactor block : 15*16 mm vials wells, 230 vc ( hach make ) 2) aa kto : rgt set cod bulk hr, 300 test ( hach make ) 3) intellical cdc401 laboratery 4-poles graphite conductivity cell, 1 m cable ( hach make ) 4) intellical phc101 laboratery low maintanance get filled ph electrode 1 m cable ( hach make ) 5) intellical isenh3181 ammonia (nh3) ion selective electrode 1 m cable ( hach make ) 6) ammonia ionic str adj pp pk/100 ( hach make ) 7) pocket pro+multi 2 tester for ph/cond/tds/salinity with replaceable sensor ( hach make )