The DDS-11X series of conductivity meters have been around for decades, and they have pretty much come to represent low-grade conductivity. The rough housing, many switches and knobs on the panel and the graded pointer display are the typical features of these meters. We launched the DDS-11X series conductivity meter using a highly integrated single-chip microprocessor, the function of all digital, high measurement accuracy, stable performance, practical and simple, high reliability, completely eliminated this model of “low price, poor performance, less functionality,” the weakness. Its low price, good measurement performance will meet the needs of many users. It can be widely used in continuous monitoring of conductivity values in solutions of thermal power, chemical fertilizer, metallurgy, environmental protection, pharmaceutical, biochemical, food and tap water.

Technical specification

　　1. Display mode: double rows of digital tubes display conductivity and temperature values respectively

　　2.Measuring range:

　　Electrode constant × (1 ~ 3000) μS/cm, 0 ~ 99.9 ℃

　　1）0.01～30μS/cm ; (with 0.01 electrode)

　　2）0.1～300μS/cm ; （with 0.1 electrode）;

　　3）1.0～3000μS/cm ; （with 1.0 electrode）;

　　4）10～30000μS/cm ; （with 10.0 electrode）;

　　Note: Wide range: Electrode constant x (10～20000) μS/cm (order specified).

　　3. Resolution: 0.001μS/cm, 0.1℃.

　　4. Electrode constant can be distributed:

　　1）DDS-11D 0.001～15.0 cm-1

　　2）DDS-11C 0.05～15.0 cm-1

　　3）DDS-11A 0.5～1.5 cm-1

　　5. Temperature compensation range: manual 0 ~ 99.9 ℃ (DDS-11A no temperature compensation)

　　6. Temperature coefficient: 0 ~ 10% / ℃ (25 ℃ as the basis)

　　7. Precision: ± 1.5% FS

　　8. Communication interface: RS232 bidirectional communication interface

　　9. Power supply: AC220V ± 22V, 50Hz ± 1Hz, external power supply

　　10.Working conditions: ambient temperature 0 ~ 60 ℃, relative humidity ≤ 90 ℅

　　11. Power-down preservation: >5 years

　　12. Size, weight: 202x202x68mm, 1.0Kg

Standard configuration

　　DDS-11X secondary meter, HT5 power supply, CP-1.0 conductivity electrode, electrode bracket.

Main features

　　Double rows of digital tubes: display the conductivity value and temperature value respectively. Microcomputerization: Adopting high-performance CPU chip, high-precision AD conversion technology and SMT patch technology to complete multi-parameter measurement, temperature compensation and automatic conversion of range with high precision and good repeatability. High reliability: single board structure, touch keys, no switch knob and potentiometer. Automatic conversion of measurement frequency: avoid electrode polarization, improve measurement accuracy. 25℃ conversion: temperature compensation manual input (DDS-11A without temperature compensation). Waterproof and anti-erosion design. Network function: RS232 bidirectional communication, can be equipped with printer or TLab1.0 communication and data processing software. Industrial controlled watchdog: ensure the meter will not crash Measurement of high purity water: DDS-11D with electrode constant 0.01cm-1 titanium electrode and sealed measuring cell. Automatic prompting of the measurement end point.

TLab 1.0 software displays meter parameters, measured values and curves

　　The difference between the three models is the different ranges of electrode constants.

　　DDS-11A has no temperature compensation.

　　DDS-11A has a single row digital tube display.

Ordering Guidelines

　　The constants of the electrodes to be distributed must be indicated.