Máy đo độ dẫn điện (CM-42X), hãng DKK-TOA Corporation

Measurement Method: 
+ Electrical Conductivity: AC 2-Electrode
+ Temperature: Thermistor Resistor

Conductivity Measuring frequency:
+ Automatically selects 80Hz / 3kHz
Display unit: Touch panel color graphic LCD

Measurement item / range:
+ Electrical conductivity: Depends on the cell 
+ Resistance: Depends on the cell
+ Salinity: Conversion from conductivity

+ Concentration: Conversion from conductivity
+ TDS: Conversion from conductivity
+ Temperature: 0.0 ~ 100 ° C

Display Range: 
+ Electrical conductivity:
0.0 ~ 200.0μS / m (0.000 ~ 2,000μS / cm)
0.000 ~ 2.000mS / m (0.00 ~ 20.00μS / cm)
0.00 ~ 20.00mS / m (0.0 ~ 200.0μS / cm)
0.0 ~ 200.0mS / m (0.000 ~ 2.000mS / cm)
0.000 ~ 2.000S / m (0.00 ~ 20.00mS / cm)
0.00 ~ 20.00S / m (0.0 ~ 200.0mS / cm)
0.0 ~ 200.0mS / m (0.000 ~ 2.000S / cm)
SI Unit (S / m) and conventional unit (S / cm) selectable

+ Resistance:
0.005 ~ 2.000Ω · m (0.5 ~ 200.0Ω · cm)
0.00 ~ 20.00Ω · m (0.000 ~ 2.000kΩ · cm)
00.0 ~ 200.0Ω · m (0.000 ~ 20.00kΩ · cm)
0.000 ~ 2.000kΩ · m (0.0 ~ 200.0kΩ · cm)
0.00 ~ 20.00kΩ · m (0.000 ~ 2.000MΩ · cm)
00.0 ~ 200.0kΩ · m (0.000 ~ 20.00MΩ · cm)
0.000 ~ 2.000MΩ · m (0.0 ~ 200.0MΩ · cm)
0.00 ~ 20.00MΩ · m (0 ~ 2.000MΩ · cm)
SI units (Ω · m) and conventional units (Ω · cm) selectable

+ Salinity:
0.00 ~ 4.04% (NaCl)
0.00 ~ 42.40psu (PSS: Sea water sanility)

+ Concentration:

0 ~ 2.000%

0 ~ 20.00%

0 ~ 200.0%

+ TDS: 
0-99.99mg / L
0-999.9mg / L
0-9.999g / L
0-99.99g / L
0-999.9g / L 
+ Temperature: -5.0 ~ 110.0 ° C

Repeatability(Main body): 

+ Electrical conductivity: ± 0.5% FS
+ Resistance: ± 0.5% FS
+ Salinity: ± 0.5% FS
+ Concentration: ± 0.5% FS
+ TDS: ± 0.5% FS
+ Temperature: ± 0.2 ℃

Temperature Compensation:
+ ATC: 0 ~ 100.0 ° C
+ MTC: 0 ~ 100.0 ° C
+ N/A: ATC OFF
+ Standard Temperature Setting: 0 ~ 100 °C 
+ Temperature coefficient(Linear): 0 ~ 100% / ° C
+ Temperature coefficient(Curve): 2-10 points
+ Pure Water Dual Temperature Compe.: Yes

Concentration Conversion Setting: 2-10 points
Temperature Calibration: 1 point calibration
Perform Guaranteed Temperature, Humidity: 0 ~ 45 ℃ 85% or less(condensation-free)
Data Memory: 2000 data
Print function: The external printer option EPS-P30 can be connected
Auto Hold Function: Yes
Auto Hold Conditions Settings: Yes
Statistical Calculation Function: Average Value
Calibration History Creation Function: Max.20 run lots each Channel, 10 electrode Types
Interval Measurement: Yes
Security Function: Yes
Upper/Lower Limit Output Setting: Yes

External Input / Output:
+ RS-232C interface: Yes (2ch)
+ USB (Host): Yes
+ USB(peripheral, Micro): Yes
+ External Instrument Connection: Yes
+ Analog Output:
- Meas. Value: 0 ~ 1 VFS
- Range: 100mV/range
- Alarm: Upper Limit: Open Collector
              Lower Limit: Open Collector
Option Connection: 

+ External Printer: Yes
+ Turntable (TTT510/710)
+ Cell Switch (ES-1GC)
+ Control Box (AC-1V): Yes

Power Source: AC100 ~ 240V (Special AC Adapter)
Power Consumption: Approx. 12VA
Main Unit Dimensions(Excluding Protruding Parts): 130 W × 60 H × 230 Dmm
Body Weight: Approx. 0.8kg

This product is used to measure electrical conductivity, electrica resistance, salinity, TDS in the laboratory