onductivity (EC) Mini Controller (0.0 – 199.9 μS/cm) Hanna Instruments BL983320

The BL983320 is a compact, panel mounted, process controller for measuring electrolytic conductivity (EC) of a process stream that is within the 0.0 to 199.9 μS/cm range. The device features a large LCD with protective cover. Users may choose from automatic or manual dosing modes. When in automatic mode the dry contact relay is activated when a reading is above the set point. The relay can be used to activate a solenoid that switches from one DI (deionized) tank to another or to open a valve that will allow lower EC water to flow into a tank being monitored in order to lower its EC. The BL983320 can also be used to monitor the quality of water produced from ion exchange, reverse osmosis (RO) or distillation.

• Adjustable Dry Contact Dosing Relay
• The BL983320 features a dosing relay that is activated when the reading is above a user programmable set point.
• Programmable Overdose Protection
• For enhanced safety the mini controller can be programmed to deactivate the dosing relay if the set point is not reached within a specified time interval. The overdosing timer is programmable from 5 to 30 minutes or disabled.
• Relay Control Override
• With the flick of a switch the mini controller’s relay can be disabled (Off), placed in control (Auto), or be activated for manual operation (On) which is useful for priming a dosing pump.
• Multicolor LED Indicator
• Multicolor LED indicator allows an operator to quickly check the status of the controller.
• Green = Meter in measurement mode and reading is below the set point.
• Orange/Yellow = Reading is above the set point and the relay is activated.
• Blinking Red = Indicates an alarm condition such as when the maximum dosing time has been exceeded.

• Fuse Protected Dosing Contacts
• The relay dosing contact is rated for up to a 2A load and is fuse protected.
• Labeled Termination Connections
• Quick-connect terminal blocks are clearly labeled for easy connection to power, conductivity probe and relay that can be used to operate a dosing pump, valve, audible alarm, or light.

• 1/2″ NPT Male Threaded Amperometric Probe for Mounting In-line*
• The BL983320 mini controller uses the HI7634 conductivity probe that is available with different cable lengths.
• *HI7634 is not included and must be ordered separately