GENERAL FEATURES
● Color High contrast LCD touchscreen, 4.3 inches.
● Multi-reading feature allows auto-read, timed-read and continuous-read.
● Automatic/Manual temperature compensation ensures accurate results.
● Auto-hold feature senses and locks the measurement endpoint.
● Data capacity of up to 1000 sets for each parameters (GLPcompliant).
● Support for USB communication.
● Auto-power off feature effectively extends the battery service life.
● Reset feature automatically resumes all settings back to factory default options.
● IP65 waterproof.
pH
● 1-5 points calibration with standard recognition.
● Selectable pH buffer groups, including NIST, DIN, GB.
● Automatic electrode diagnosis with pH slope and offset display.
Conductivity
● 1-3 points calibration with standard recognition.
● Settable parameters, including cell constant, temperature
compensation coefficient, and TDS factor.
● Temperature compensation type (none, linear, pure water).
Ion
● 1-5 points calibration.
● Selectable measurement unit, including μg/L, mg/L, g/L, mmol/L, pX, ppm, etc.
● Measurement modes are supported, including Direct Reading mode,
Standard Addition mode, Sample Addition mode and GRAN mode.
● Over 10 methods are built-in, including F-, Cl-, Br-, I-, NO3-, BF4-, NH4+, K+, Na+, Ca2+, Cu2+, Pb2+, Ag+ and etc.; user-defined method is supported.
DO
● Support for air-saturated water or zero oxygen calibration.
● Automatic/Manual barometric pressure compensation.
● Manual Salinity Factor Correction.
● Selectable pressure unit, including kPa, mbar, Torr, Atm.
| Model | M310T | PH310T | EC310T | I310T | |
| Parameters (up to 12) | pH/EC/ISE/DO/Temp. (mV/ORP/pX/Resistivity/TDS/Sal. / DO Saturation) | pH/Temp. (mV) | EC/Temp. (Resistivity/TDS/Sal.) | pH/ISE/Temp. (mV/pX) | |
| pH | Range | -2.00 to 20.00pH | ● | / | ● |
| Resolution | 0.1, 0.01 pH | ● | / | ● | |
| Accuracy | ±0.01 pH | ● | / | ● | |
| Calibration Points | Up to 5 | ● | / | ● | |
| Standard Customization | Yes | ● | / | ● | |
| Calibration Reminder | Yes | ● | / | ● | |
| Standard Recognition | NIST, GB and DIN buffers | ● | / | ● | |
| mV | Range | -2000.0 to 2000.0 mV | ● | / | ● |
| Resolution | 0.1 | ● | / | ● | |
| Accuracy | ±0.3 mV or ±0.1 % | ● | / | ● | |
| pX | Range | -2.00 to 20.00 | / | / | ● |
| Resolution | 0.1, 0.01 pX | / | / | ● | |
| Accuracy | ±0.02 pX | / | / | ● | |
| Calibration Points | Up to 5 | / | / | ● | |
| ISE | Range | 1E-9 to 9.999E9 | / | / | ● |
| Units | mol/L, mmol/L, g/L, mg/L, μg/L, ppm | / | / | ● | |
| Resolution | Up to 4 significant digits | / | / | ● | |
| Accuracy | ±0.5 % | / | / | ● | |
| Calibration Points | Up to 5 | / | / | ● | |
| Conductivity | Range | 0.000 μS/cm to 1000 mS/cm | / | ● | / |
| Resolution | 0.001 μS/cm minimum; changed with range | / | ● | / | |
| Accuracy | ±1.0 % FS | / | ● | / | |
| Reference Temperature | 20, 25 ºC | / | ● | / | |
| Calibration Points | Up to 3 | / | ● | / | |
| Calibration Reminder | Yes | / | ● | / | |
| Standard Recognition | 84μS/cm, 1413μS/cm; 12.88mS/cm | / | ● | / | |
| Resistivity | Range | 5.00Ω·cm ～ 20.00MΩ·cm | / | ● | / |
| Resolution | 0.01Ω·cm minimum | / | ● | / | |
| Accuracy | ±1.0 % FS | / | ● | / | |
| TDS | Range | 0.00mg/L ～ 300g/L | / | ● | / |
| Resolution | 0.01mg/L minimum; changed with range | / | ● | / | |
| Accuracy | ±1.0% | / | ● | / | |
| Salinity | Range | (0.00 ～ 8.00)% | / | ● | / |
| Resolution | 0.01% | / | ● | / | |
| Accuracy | ±0.2% | / | ● | / | |
| Dissolved Oxygen Concentration | Sensor Type | Polarographic | / | / | / |
| Range | 0.00 to 50.00 mg/L | / | / | / | |
| Resolution | 0.01mg/L | / | / | / | |
| Accuracy | ±0.3mg/L | / | / | / | |
| Calibration Reminder | Yes | / | / | / | |
| Calibration Points | Air-saturated water or zero point | / | / | / | |
| Barometric Compensation | Yes | / | / | / | |
| Manual Salinity Factor Correction | Yes | / | / | / | |
| Saturation | Range | （0.0 to 300.0）% | / | / | / |
| Resolution | 0.1% | / | / | / | |
| Accuracy | ±10.0 % | / | / | / | |
| Temperature | Range | -5 to 110 ºC, 23 to 230 ºF | ● | ● | ● |
| Unit | ºC, ºF | ● | ● | ● | |
| Resolution | 0.1 | ● | ● | ● | |
| Relative Accuracy | ±0.2 | ● | ● | ● | |
| Measurement | Reading Mode | AutoRead( Fast, Medium, Slow), Timed, Continuous | ● | ● | ● |
| Reading Prompts | Reading, Stable, Locked | ● | ● | ● | |
| Temp. Compensation | ATC, MTC | ● | ● | ● | |
| Data Management | Data Storage | 1000 results each | ● | ● | ● |
| GLP Features | Yes | ● | ● | ● | |
| Inputs | pH Electrode | BNC(Q9) | ● | / | ● |
| Temp./DO Probe | 4-pin aviation connector | ● | / | ● | |
| Temp./EC. Probe | 5-pin aviation connector | / | ● | / | |
| Outputs | USB | USB 2.0 flash memory device, PC,scanner | ● | ● | ● |
| Display Options | Backlight | Yes | ● | ● | ● |
| Auto Shut-down | 300, 600, 1200, 1800, 3600sec, off | ● | ● | ● | |
| IP Rating | IP65 | ● | ● | ● | |
| Date and Time | Yes | ● | ● | ● | |
| General | Power | Rechargeable Lithium batter; AC Adapter， 100-240 VAC input, DC5V output | ● | ● | ● |
| Dimensions | 90 x 255 x 40 mm | ● | ● | ● | |
| Weight | 500g (1.1 lb) | ● | ● | ● | |