a:4:{s:20:"pH measurement range";s:21:"(-2.000) to 20.000 pH";s:11:"pH accuracy";s:11:"± 0.002 pH";s:21:"pH calibration points";s:12:"1 - 5 points";s:24:"pH calibration solutions";s:30:"USA, NIST, DIN or user defined";}

a:4:{s:21:"ORP measurement range";s:20:"-1999.9 to 1999.9 mV";s:12:"ORP accuracy";s:8:"±0.2 mV";s:22:"ORP calibration points";s:7:"1 point";s:25:"ORP calibration solutions";s:16:"mV & relative mV";}

a:4:{s:21:"Ion measurement range";s:27:"0 to 19999 ppm, mg/L, mol/L";s:13:"Ion accuracy";s:50:"± 0.5 % F.S. (monovalent), ± 1 % F.S. (divalent)";s:22:"Ion calibration points";s:12:"2 - 5 points";s:25:"Ion calibration solutions";s:58:"0.001, 0.01, 0.1, 1, 10, 100, 1000, 10000 ppm, mol/L, mg/L";}

a:4:{s:21:"Ion measurement range";s:0:"";s:13:"Ion accuracy";s:0:"";s:22:"Ion calibration points";s:0:"";s:25:"Ion calibration solutions";s:0:"";}

a:8:{s:30:"Conductivity measurement range";s:53:"0 - 20.00, 200.0, 2000 µS / cm, 20.00, 200.2 mS / cm";s:22:"Conductivity accuracy";s:13:"± 0.5 % F.S.";s:31:"Conductivity calibration points";s:12:"1 - 5 points";s:34:"Conductivity calibration solutions";s:67:"10 µS / cm, 84 µS / cm, 1413 µS / cm, 12.88mS / cm, 111.8mS / cm";s:23:"Temperature coefficient";s:19:"0.0 to 10.0 % / °C";s:18:"Compensation modes";s:19:"Linear or pre water";s:13:"Cell constant";s:30:"K = 0.1, 1, 10 or user-defined";s:25:"Normalization temperature";s:16:"20 °C or 25 °C";}

a:8:{s:30:"Conductivity measurement range";s:0:"";s:22:"Conductivity accuracy";s:0:"";s:31:"Conductivity calibration points";s:0:"";s:34:"Conductivity calibration solutions";s:0:"";s:23:"Temperature coefficient";s:0:"";s:18:"Compensation modes";s:0:"";s:13:"Cell constant";s:0:"";s:25:"Normalization temperature";s:0:"";}

a:3:{s:9:"TDS range";s:58:"0 to 100 ppt. (max. 200 ppt., depending on factor setting)";s:12:"TDS accuracy";s:11:"± 1 % F.S.";s:10:"TDS factor";s:23:"0.1 - 1.0 (default 0.5)";}

a:3:{s:9:"TDS range";s:55:"0-100 ppt. (max. 200 ppt., depending on factor setting)";s:12:"TDS accuracy";s:11:"± 1 % F.S.";s:10:"TDS factor";s:23:"0.1 - 1.0 (default 0.5)";}

a:3:{s:9:"TDS range";s:0:"";s:12:"TDS accuracy";s:0:"";s:10:"TDS factor";s:0:"";}

a:3:{s:14:"Salinity range";s:28:"0 to 100 ppt. (max. 80 ppt.)";s:17:"Salinity accuracy";s:10:"± 1 % F.S";s:17:"Measurement modes";s:30:"Seawater or practical salinity";}

a:3:{s:14:"Salinity range";s:0:"";s:17:"Salinity accuracy";s:0:"";s:17:"Measurement modes";s:0:"";}

a:3:{s:17:"Resistivity range";s:11:"0 to 100 Ω";s:20:"Resistivity accuracy";s:10:"± 1 % F.S";s:22:"Resistivity resolution";s:12:"0.01, 0.1, 1";}

a:3:{s:17:"Resistivity range";s:0:"";s:20:"Resistivity accuracy";s:0:"";s:22:"Resistivity resolution";s:0:"";}

a:7:{s:22:"DO concentration range";s:18:"0.00 to 20.00 mg/L";s:11:"DO accuracy";s:11:"± 0.2 mg/L";s:18:"Calibration points";s:12:"1 - 2 points";s:19:"Pressure correction";s:33:"60.0 to 112.5 kPa, 450 - 850 mmHg";s:19:"Salinity correction";s:11:"0 to 50 g/L";s:22:"% Saturation of Oxygen";s:14:"0.0 to 200.0 %";s:8:"Accuracy";s:8:"± 2.0 %";}

a:7:{s:22:"DO concentration range";s:0:"";s:11:"DO accuracy";s:0:"";s:18:"Calibration points";s:0:"";s:19:"Pressure correction";s:0:"";s:19:"Salinity correction";s:0:"";s:22:"% Saturation of Oxygen";s:0:"";s:8:"Accuracy";s:0:"";}

0 to 100 °C, 32 to 212 °F, Manual or Automatic

Low or high

0 to 31 days

Stores up to 500 data sets

USB communication interface

185 × 88 × 32 mm

300 g

3 × 1.5 V “AA batteries or DC 5 V power adapter