HI 9923: pH and Conductivity Controller, Wall Mount

• Ideal for Boiling and Cooling Towers
• 2 powerful units in 1
• Automatic temperature compensation

HI 9923 is a 2-in-1 pH and conductivity controller engineered for monitoring of industrial boilers and cooling towers. Two separate setpoints can be adjusted from 5 to 10 pH and 1 to 6 mS/cm to activate independent relays. Two pumps or electro-valves can be wired directly to the controller and be powered through the terminals. For optimum control, the operator can set the Dead Band (hysteresis) from 0 to 0.5 mS/cm. Trimmers for the pH and conductivity are positioned on the front panel make for easy calibration. A ground probe can be connected to the appropriate terminals to prolong the pH electrode's life. HI 9923 provides for an alarm relay which is activated when pH falls below the setpoint by the operator-adjustable threshold of 0.5 to 2.5 pH, or conductivity exceeds the setpoint by a value in the 0.5 to 2.5 mS/cm range. The alarm is activated also if the pH and/or conductivity are not corrected within the operator-determined time frame of 1 to 90 minutes. The boiler and cooling towers' status can be ascertained from a distance with dosage and alarm LED's. This 2-in-1 controller accepts pH electrodes with a BNC connector and a conductivity probe with a DIN connector incorporating a temperature sensor. The HI 9923 compensates for the temperature effect of conductivity measurements automatically.

HI 9923 is supplied complete with instructions.