pH, conductivity and temperature meter Hanna Instruments HI-5521 benchtop, minimum pH -2.000, maximum pH 20.000, minimum conductivity 0.000µS/cm, maximum conductivity 1000mS/cm, minimum temperature -20.0°C, maximum temperature 120.0°C, PC connectivity with cable included, 5 calibration points (pH), 4 calibration points (conductivity), standard probe included (HI-1131B, HI-76312 and HI-7662-W), also includes 2 x pH 4.01 buffer solution (HI-7004), 4 x pH 7.01 buffer solution (HI-7007), 2 x pH 10.01 buffer solution (HI-7007), 2 x general purpose electrode cleaning solution (HI-700601), 1 x KCl electrolyte solution (HI-7082) and 1 x electrode holder (HI-76404W)