1. Measurement parameters: pH/ORP/On/Conductivity/TDS/Salinity/Electrical resistivity/Dissolved oxygen/℃
2.pH
Range: 2.000
to 20.000 pH
Resolution: 0.1, 0.01, 0.001 pH
Relative accuracy: ± 0.02 pH
Correction point: 16
drop
Automatic buffer recognition: Yes
Display slope/offset: Yes
3. Ions
Range: 0.001 to 19900
Resolution: 2/3 words
Relative accuracy: Full range ± 0.5% (monovalent ions) ; Full range ± 1% (divalent ions)
Correction point: up to 8 o'clock
4.ORP
Range: ± 2000.0mV
Resolution: 0.1mV
Relative accuracy: ± 0.2Mv
5. Temperature
Range: 10.0
To 110 ℃ (instrument); 0 to 60.0 ℃ (dissolved oxygen electrode)
Resolution: 0.1 ℃
Accuracy: ± 0.5 ℃
6. Conductivity
Range: 0 to 2.000 μ S/cm ; 2.000 to 300.0 μ S/cm ; 300.0 μ S/cm to 4.000mS/cm ;
4.000 to 40.00mS/cm; 40.00 to 500.0mS/cm
Resolution: 0.01 ; 0.01 μ S/cm ; 0.001,0.01,0.1 mS/cm
Relative accuracy: Full range ± 1%+1LSD
Calibration point: automatic 4 o'clock, manual 5 o'clock
Conductivity cell constant: 0.010 to 10.000
Temperature compensation coefficient: linear&pure water
Standard temperature: 15 to 30 ℃
Automatic range selection: Yes
7.TDS
Range: 0 to 2.000 ppm;2.000ppm to 300.0ppm;300.0ppm to 4.000ppt;4.000ppt to 40.00ppt;40.00ppt to 500.0ppt
Resolution: 0.01,0.1ppm ; 0.001,0.01,0.1ppt
Relative accuracy: Full range ± 1%+1LSD
TDS coefficient: 0.40 to 1.0

8. Salinity
Range: 0 to 0.770 ppm;0.770ppm to 143.3ppm;143.3ppm to 2.138ppt;2.138ppt to 23.64ppt;23.64ppt to 80.00ppt
Resolution: 0.01,0.1ppm ; 0.001,0.01ppt
Relative accuracy: Full range ± 1%+1LSD
9. Electrical resistivity
Range: 2.000 Ω to 25.00 Ω ; 25.00 Ω to 250.0 Ω ; 250.0 Ω to 3.333k Ω ; 3.333k Ω to 500.0k Ω ; 500.0k Ω to 20.00M Ω
Resolution: 0.01,0.1,0.001 Ω; 0.1,0.01M Ω
Relative accuracy: ± 1% of full range
7. Dissolved oxygen
Range: 0.00 to 90.00mg/L/ppm
Resolution: 0.01mg/L ; 0.01ppm
Relative accuracy: ± 0.2mg/L
Correction point: 1 o'clock
8.% oxygen saturation
Range: 0 to 600.0%
Resolution: 0.1%
Relative accuracy: ± 2.0%
9. Salinity compensation
Range: 0.0 to 50.0ppt
Resolution: 0.1ppt
Method: Automatic/Manual
10. Atmospheric compensation
Range: 450 to 825mmHg ⋵ 59.9 to 109.9kPa
Resolution: 0.1mmHg/kPa
Method: Automatic compensation
11. Temperature compensation coefficient: automatic/manual (0.0 to 100 ℃)
12. GLP standards: Compliant with
13. Correction reminder: Yes
14. IP67 standard: Compliant with
15. Data storage: 500 sets
16. Operating temperature: 0 to 50 ℃
17. Locking function: Yes
18. LCD display: backlit LCD (5.4 * 7.1cm)
19. Automatic shutdown: Automatic shutdown without operation for 2 to 30 minutes
20. Input: DC phoenix sockets, BNC, 6-pin interface, 8-pin interface
21. Output: IrDA (infrared transmission), RS232
22. Power supply: 4 * 1.5 V 'AAA' alkaline battery, 9V regulated power supply, 500mA
23. Battery life:>200 hours
24. Size/Weight: 18.3cm * 9.5 * 5.7cm/460g (single machine) ⋵ 40cm * 33cm * 10cm/3200g (packed)