A versatile, highly stable & accurate TDS Meter, instrument to measure conductivity of water and other aqueous solutions for laboratories & field. Model available me 978 c. Range 5 ranges 0 to 1000 ppt display 3 ½ digit led display accuracy ± 2% fs ± 1 digit resolution 0. 1 ppm temp. Compensation 0° to 50° c manual cell constant adjustable on display cell platinum dip power 230 vac ± 10% 50 hz ac size (lxbxh) 275 x 175 x 75 mm weight 2. 0 kgm. (approx) accessories tds cell, dust cover, operation manual.