Mini Panel-Mount Conductivity and TDS Controllers - Discontinued


 | CDCN201

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  • Simple One-Point Calibration
  • Compact, Practical and Convenient
  • Activation Relay to Start/Stop Valve or Pump
  • Easy to Mount with Brackets Included


The CDCN200 Series has been discontinued. Please see the CDCN-961 as a possible alternative or contact our Flow Engineering Department.

The CDCN200 series mini controllers have been specially designed for the water conditioning applications. They are miniaturized to an 8 by 5 cm (3 x 2") dimension so that they can be mounted right on the water softening equipment. Due to their equally compact prices, these meters are ideal for softeners that do not incorporate a controller and leave the controlling to manual checks. The conductivity and TDS values are displayed in large digits on the LCD. There are even LED’s to indicate whether the relay is active or not. CDCN201 and CDCN202 measure conductivity from 0 to 1999 MicroSiemens/cm and 0.00 to 10.00 MilliSiemens/cm, respectively. CDCN203 and CDCN204 check and control TDS from 0.00 to 10.00 ppt and 0 to 999 ppm, respectively.

CDCN203 and CDCN204 operate with a conversion rate of 0.50 between TDS and conductivity which best fits the water conditioning and softening applications. A built-in relay terminal is activated when the measurements are above the setpoint. This allows for the conductivity to be lowered to the desired threshold. In order to adjust the setpoint or calibrate the controllers, simply turn the relevant trimmer positioned on the front panel. The controllers are easy to install and come with probes and mounting brackets.

The CDE201 and CDE202 probes have ½ " external threads so that they can be installed directly in the softener’s pipe. The probes incorporate a fast responding temperature sensor. The 2 meter (6.6') lead ends in a 5-wire terminal, which incorporates an anti-noise wire, particularly important when working in an environment with running pumps or machinery. Temperature affects EC and TDS to the tune of 2% per degree. These mini controllers compensate for the temperature automatically. In order to provide the best solution for your application, the meters are available in three models.

Choose from the switchable 100-110V/220-240V operated models or optional 12 VDC version with the transformer included in the low price.

    CDCN201: 0 to 1999 µS/cm
    CDCN202: 0.00 to 10.00 mS/cm
    CDCN203: 0.00 to 10.00 ppt
    CDCN204: 0 to 999 ppm
    CDCN201:1 µS/cm
    CDCN202: 0.01 mS/cm
    CDCN203: 0.01 ppt
    CDCN204: 1 ppm
Accuracy [@ 20°C (68°F)]: ±2% FS,
    CDCN204: ±1% FS
Calibration: 1 point adjustable
Temperature Compensation: Automatic from 5 to 50°C (41 to 122°F)
Setpoint: SPST 5A relay adjustable with trimmer throughout the range
Relay Control: Activated when the reading is higher than the setpoint
Thread Size: ½NPT
Power Supply: 110/115 V, 50 to 60 Hz; 220/240 V, 50 to 60 Hz; 12 Vdc adaptor (optional)
Environment: 0 to 50°C (32 to 122°F); 95% RH
Dimensions: 79 x 49 x 95 mm (3.1 x 1.9 x 3.8")
Weight: 150 g (5.3 oz)


Baixar Conductivity Indicators and Controllers
Baixar Conductivity Indicators and Controllers
Baixar TDS Indicators and Controllers
Baixar TDS Indicators and Controllers
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