EC-1800 industrial online conductivity/resistivity measurement and control instrument, integrated ARM MCU chip, signal measurement in the way of software automatic real-time tracking, to achieve the intelligent instrument, so that the measurement accuracy and stability are further improved;<br/> The meter can be adapted to a variety of conductivity electrodes: 0.01, 0.02, 0.1, 1.0, 10.0cm-1 conductivity electrodes, measuring range from 18.25 MΩ(0.05 us) to 100 mS (temperature compensation using NTC10K, can achieve 0-120℃ temperature measurement);<br/> The instrument is widely used in water treatment equipment, environmental engineering, pharmaceutical, electronics, chemical, agricultural planting, aquaculture, scientific research institutes, electroplating, metallurgical manufacturing, machining and other industries.</p>

■ Overview

The EC-1800 is an intelligent upgrade of DJK-110 industrial conductivity/TDS meter, designed for continuous monitoring in:
✔ Scientific research ✔ Chemical/pharmaceutical ✔ Environmental protection
✔ Metallurgy ✔ Papermaking ✔ Food/beverage ✔ Water supply
Dual Power Options:

• ● EC-1800A: 220V AC (IEC 61140 compliant)
• ● EC-1800B: Safety low-voltage 24V AC/DC (SELV/PELV certified)

Key Features:

• ● Bilingual UI (CN/EN switchable)
• ● Conductivity/TDS + temperature measurement with dual relay output control
• ● Adjustable temp. compensation (0-10%) & TDS conversion factors
• ● 4-20mA isolated output (300Ω max loop resistance)
• ● Audible alarm with on/off setting
• ● Programmable LCD backlight (auto-off available)
• ● EMI-resistant design with industrial-grade CPU
• ● One-touch factory reset & password protection

■ Technical Specifications

Accuracy: ±1% FS
Stability: ±1% FS/24h
Electrodes: 1.0 plastic platinum-black (standard) / Optional 316L stainless steel
Cell Constant: 1.0 cm⁻¹
Temp. compensation element: NTC 10K Thermistor
Temp range: 0-100℃, (0.1℃ resolution)
Medium Temp.: 5-100℃ @ 0.5MPa max
Installation: 1/2" NPT thread
Pressure Rating: 0～0.5MPa
Cable Length: Standard 5m (Custom lengths available)
Temperature Compensation: Reference at 25℃ (User-adjustable coefficient)
Display: 128×64 LCD
Outputs:

• ● Dual relay alarms (5A/250V AC contacts)
• ● 4-20mA analog output (Isolated)

Power Supply:

• ● EC-1800A: AC 220V±10% 50Hz
• ● EC-1800B: AC/DC 24V±10%

Power Consumption: ≤3W
Environmental Conditions:

• ● Operating Temperature: 0～60℃
• ● Humidity: ≤85% RH

Dimensions:

• ● Housing: 96×96×110mm (H×W×D)
• ● Panel Cutout: 92×92mm  (H×W)

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  ■ Installation

   

  Mounting

  • 1.Insert controller through panel cutout (92×92mm)
    2.Secure with included brackets

     

    

    Figure 1 Fixed support installation

     

    ■ Wiring connection diagram

    

    Figure 2 Rear terminals diagram

     

    ■ Connection notes

    1． R (红)：Temperature （NTC10K）
    2． Y (黄)：Conductivity
    3． B (黑)：Temperature（NTC10K）
    4． W (白)：Conductivity
    5． 485A：RS485 communication port
    6． 485B：RS485 communication port
    7． mA+:   4~20mA output +
    8． mA-:   4~20mA output -  
    9． LO:  low limit alarm
    10． HI:  high limit alarm
    11． NC：undefined
    12． NC：undefined
    13． N：220V power connection
    14． L：220V power connection

     

    ■ Electrode Installation

     

    1)Electrode constant selection:

    

    Figure 3 Electrode constant selection

     

     

    2)Electrode shape and type of installation

    

    Figure 4 Electrode size

    

    Figure 5 Electrode installation diagram