ECG-1903 series of microcomputer-based industrial control instruments are precision meters for measurement

of conductivity or resistivity of solution. With complete functions, stable performance, simple operation and

other advantages, they are optimal instruments for industrial measurement and control.

The advantages of this instrument include: LCD display with back light and display of errors; automatic

temperature compensation; isolated 4~20mA current output; dual relay control; adjustable delay; alarming with

upper and lower thresholds; power-down memory and over ten years of data storage without backup battery.

According to the range of resistivity of the water sample measured, the electrode with a constant k = 0.01, 0.1,

1.0 or 10 can be used by means of flow-through, immerged, flanged or pipe-based installation.

1.Measuring range:

0.1~200 uS/cm     (Electrode: K=0.1)

1.0~2000 us/cm    (Electrode: K=1.0)

10~20000 uS/cm   (Electrode: K=10.0)

0~19.99MΩ      (Electrode: K=0.01)

2. Resolution: 0.01 uS /cm, 0.01 MΩ

3. Precision: 0.02 uS /cm, 0.01 MΩ

4. Stability: ≤0.04 uS/cm 24h; ≤0.02 MΩ／24h

5. Standard solution: Any standard solution

6. Control range: 0~19.99mS/cm, 0~19.99KΩ

7. Temperature compensation: 0~60.0℃

8. Output signal: 4~20mA isolated protection output, Can double the current output.

9. Output control mode: ON/OFF relay output contacts (two sets)

10. Relay load: Max. 230V, 5A(AC); Min. l l5V, 10A(AC)

11. Current output load: Max. 500Ω

12. Working voltage: AC 230V ±l0％, 50/60Hz

13. Overall dimension: 96x96x110mm; dimension of the hole: 92x92mm

14. Working condition: ambient temperature: 5～45℃