Onset MX2501 HOBO pH and Temperature Data Logger (2.00~12.00 pH; -512 đến 512; -2°~50°C)

pH Sensor: 

  Range: 2.00 to 12.00 pH (in pH); -512 to 512 mV (in mV)

  Accuracy: ±0.10 pH units within ±10°C of temperature at calibration (in pH); ±0.20 mV (in mV)

  Resolution: 0.01 pH (in pH); 0.02 mV (in mV)

  Response Time: 1 minute typical to 90% at constant temperature in stirred water 

  Sample Ionic Strength: ≥ 100 µS/cm 

Temperature Sensor: 

  Range: -2° to 50°C (28.4° to 122°F) 

  Accuracy: ±0.2°C (±0.36°F) 

  Resolution: 0.024°C at 25°C (0.04°F at 77°F) 

  Response Time: 7 minutes typical to 90% in stirred water 

Logger:

  Operating Range: -2° to 50°C (28.4° to 122°F) — non-freezing 

  Logging Rate: 1 second to 18 hours 

  Time Accuracy: ±1 minute per month 0° to 50°C (32° to 122°F) 

  Battery Type: One AA 1.5 Volt, user-replaceable

  Dimensions: 22.86 x 4.27 cm (9.0 x 1.68 inches); mounting hole 0.64 cm (0.25 inches) 

  Weight: 268.2 g (9.46 oz)