All three parameters plus temperature, measured and displayed simultaneously!

•Durable waterproof and dustproof design with IP67 rating.
•Push-button calibration for all parameters (6 points for pH; 5 points for conductivity; 2 points for DO).
•Multi-line display with electrode status indicator and calibration data.
•User-settable “calibration due” alarm.
•Time-and-date stamping meets GLP standards.
•Store up to 500 data sets.
•Infrared IrDA wireless technology makes PC downloading convenient and easy.
•Audible warning when readings are outside set point limits.
•Security password protection for calibration and setup menus.

Specifications:
pH Range: -2.000 to 20.000
Resolution: 0.1, 0.01, 0.001
Accuracy: ±0.002
mV Range: ±2000.0
Resolution: 0.1
Accuracy: ±0.2 mV
Ion Range: 0.001 to 19,900 ppm, molar, or mg/L
Resolution: 2 or 3 digits
Accuracy: 0.5% FS (monovalent); 1% FS (divalent)
Conductivity Range:0 to 500 mS
Resolution: 0.05% full scale
Accuracy: ±1% full scale
TDS Range: 0 to 500 ppt
Resolution: 0.05% full scale
Accuracy: ±1% full scale
DO % saturation Range:0 to 600%
Resolution: 0.1%
Accuracy: ±2%
DO mg/L (ppm) Range:90 mg/L
Resolution: 0.01 mg/L
Accuracy: ±0.2mg/L
Salinity correction: Manual
Barometric pressure correction: Automatic
Temperature Range: -10 to 110°C (14 to 230°F)
Resolution: 0.1°C
Accuracy: ±0.5°C (±0.9°F)
ATC: Automatic or manual, 0 to 100°C
Real Time Clock: Yes
RS-232: IrDA
Power: Four 1.5V batteries (included) or optional universal AC adapter
Dimensions:7.25""L x 3.25""W x 2.25""H