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Conductivity Mini Controller (0 - 1999 µS/cm) - BL983313



In stock


In stock


In stock

The BL983313 is a compact, panel mounted, process controller for measuring electrolytic conductivity (EC) of a process stream that is within the 0 to 1999 µS/cm range. 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 dosing pump or a solenoid that controls a valve.

Multicolor LED Indicator

LED changes color based on status.

Fire Retardant Casing

For additional safety the controllers outer case is made of fire resistant plastic.

Splash Resistant Cover

A clear plastic cover protects the face panel from dirt and liquids.


This compact, panel mounted, process controller is ideal for measuring total dissolved solids (TDS) of a process stream. This controller 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 supply power to a dosing pump or a solenoid connected to a valve. The BL983315 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 BL983315 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.

BL983315 uses a 0.5 conversion factor in which 1.0 µS/cm = 0.5 ppm.

  • Model available with 4-20 mA galvanic isolated output with external dosing disable contact
  • Large Clear LCD
  • Fire Retardant Casing
  • Splash-Resistant Cover

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 BL983315 mini controller uses the HI7634 conductivity probe that is available with different cable lengths.

*HI7634 is not included and must be ordered separately

Additional information

Weight 0.45 kg


EC Accuracy

±2% f.s.

EC Calibration

manual, with CAL trimmer

EC Range

0 to 1999 µS/cm

EC Resolution

1 µS/cm


SKU BL983313-web
Name Conductivity Mini Controller (0 – 1999 µS/cm) – BL983313
Range 0 to 1999 µS/cm
Resolution 1 µS/cm
Accuracy ±2% f.s. at 25 °C (77 °F)
Temperature Compensation automatic from 5 to 50°C (41 to 122°F) with β =2%/ºC
Calibration manual, with calibration trimmer
Output galvanic isolated 4-20 mA output; accuracy ±0.2 mA;
Output 500 Ω maximum load (BL983313-2 only)
Dosing adjustable setpoint covers measure range
Dosing relay relay closes when reading > setpoint
Dosing dosing contact maximum 2A (internal fuse protection),250 VAC or 30 VDC
Dosing overtime Dosing relay is disabled if setpoint is not reached within the set time interval. Timer adjustable between approx. 5 to 30 minutes, or disabled by jumper.
Dosing external disable input Normally Open: enable / Closed: disable dosing (BL983313-2 only)
Power Supply models “-0” – 12 VDC adapter (included)
Power Supply models “-1” 115/230 VAC; 50/60Hz
Power Supply models “-2”: 115/230 VAC, 4-20 mA Output
Power Supply input: 10 VA for 115/230 VAC, 50/60 Hz models; 3 W for 12 VDC models; fuse protected; installation category II.
Dimensions 83 x 53 x 99 mm (3.3 x 2.1 x 3.9”)
Weight 12 VDC models, 200 g (7.1 oz); 115/230 VAC models 300 g (10.6 oz)

Ordering Info

BL983313-1 (115/230 VAC) and BL983313-0 (12 VDC) are supplied with mounting brackets, transparent cover and instruction manual.


Conductivity Mini Controller (0 – 1999 µS/cm) – BL983313