Features: 
- Easy to read LCD display    
- One-hand operation
- On-screen icon displays battery power and GPS, USB and probe unit connectivity
- Quick-connect connector (cable to control unit)
- Shock resistant cover
- Backlight display
- Ultra-sensitive turbidity sensor
- Turbidity sensor conforms to EN ISO 7027
- Minimum dissolved oxygen sensor maintenance with screw-on type membrane cap
- Chemical resistant materials of construction
- Optional ToupH pH electrode* that is difficult to break (* Prevents damage during maintenance)
- Field replaceable sensors
- Have data logging capability (10,000 sets of data including date/time and site name) with USB connectivity to PC
- Latest calibration data/date can be viewed on the display at any time.
- Has a GPS receiver to log latitude and longitude
- Probe attached on 10m cable
- Complete manual calibration certificate available. Select under options.
Specifications
 
 
Measurement functions: 
- pH, Dissolved Oxygen, Conductivity, Salinity, TDS, Seawater specific gravity, Temperature, ORP (Oxidation Reduction Potential), Turbidity and water depth.
Sensor probe: 
- Max.items displaying simultaneously: 11 
- Measurement temperature: -10 to 55 C
- Max. sensor diameter: Approx. 96mm
- Probe length: Approx. 340mm
- Cable length: 10m
- Mass: Approx. 1800g (3.97 lbs)
- Automatic calibration: Yes
- Measurement depth: Max. 30 m
- Material contact with liquid: PPS, glass, SUS316L, SUS304, FKM, PEEK, Q,Titanium, FEP membrane, POM
- Water resistance: JIS protection level 8
Monitor:  
- LCD: 320 X 240 liquid crystal display with backlight (black and white) 
- Data memory: 10,000 
- Water resistance: JIS protection level 7 (when sensor cable is fitted) 
- Communication: USB 
- Battery life: Approx. 70 hours without backlight 
- Outer dimensions: 115(W) X 66(D) X 283(H) mm 
pH: 
- Measurement principle: Glass electrode method 
- Range: pH 0 to 14 
- Resolution: 0.01pH 
- Repeatability: +/- 0.05pH 
- Accuracy: +/- 0.1pH 
- Two-point calibration 
- Automatic temperature compensation 
Oxidation Reduction Potential (ORP):  
- Measurement principle: Platinum electrode method 
- Range: -2000 mV to +2000 mV 
- Resolution: 1 mV 
- Repeatability: +/- 5 mV 
- Accuracy: +. 15 mV 
Dissolved Oxygen:  
- Salinity conversion (0 to 70 PPT / automatic) 
- Automatic temperature compensation 
- Measurement principle: Polarographic method 
- Range: 0 to 50.0 mg/L 
- Resolution: 0.01 mg/L 
- Repeatability: +/- 0.1 mg/L 
- Accuracy: 0 to 20 mg/L: +/- 0.2 mg/L; 20 to 50 mg/L:+/- 0.5 mg/L 
Conductivity:  
- Measurement principle: 4 AC electrode method 
- Range: 0 to 10 S/m (0 to 100 mS/cm) 
- Resolution: 0.000 to 0.999 mS/cm:0.001, 1.00 to 9.99 mS/cm: 0.01, 10.0 to 99.9 mS/cm: 0.1, 0.0 to 99.9 mS/m: 0.1, 0.100 to 0.999 S/m: 0.001, .00 to 9.99
    S/m: 0.01 
- Repeatability: +/- 0.05% F.S. 
- Accuracy: *+/- 1% F.S.(Median of two-point calibration) 
- Auto range 
- Automatic temperature conversion (25 C) 
Salinity:  
- Measurement principle: Conductivity conversion 
- Range: 0 to 70 PPT (permillage) 
- Resolution: 0.1 PPt 
- Repeatability: +/- 1 PPT 
- Accuracy: +/- 3 PPT 
Total Dissolved Solid (TDS):  
- Measurement principle: Conductivity conversion 
- Range: 0 to 100 g/L 
- Resolution: 0.1% F.S. 
- Repeatability: +/- 2 g/L 
- Accuracy: +/- 5 g/L 
Seawater specific gravity:  
- Measurement principle: Conductivity conversion 
- Range: 0 to 50 delta T 
- Resolution: 0.1 delta T 
- Repeatability: +/- 2 delta T 
- Accuracy: +/- 5 delta T 
Temperature:  
- Measurement principle: Thermistor method 
- Range: -10 to 55 C 
- Resolution: 0.01 C 
- Repeatability: *+/- 0.10 C (at calibration point) 
- Accuracy: JIS class B platinum thermometer sensor (+/- 0.3+0.005 |t|) 
Turbidity (TURB):  
- Measurement principle: LED light source and 90 degrees scattering method 
- Range: 0 to 1000 NTU, 0 to 0.99: 0.01 NTU, 1 to 99.9:0.1 NTU 
- Resolution: 0 to 9.99 NTU: 0.01,1 to 99.9 NTU: 0.1, 100 to 1000 NTU: 1, 
- Repeatability: +/- 5% (reading) or +?- 0.5 NTU whichever is greater 
- Accuracy: 0 to 10 NTU: +/- 0.5 10 to 1000 NTU: 3% (reading) or +/- 1 NTU whichever is greater 
Water depth:  
- Measurement principle: Pressure method (only for 10m and 30m product) 
- Range: 0 to 30 m 
- Resolution: 0.05 m 
- Repeatability: +/- 1% F.S. 
- Accuracy: +/- 0.3 m 
GPS: 
- 12 channel parallel