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TDS Mini Controller (0.00 to 19.99 ppm) - BL983321-12VDC

The BL983321 is a compact, panel mounted, process controller for measuring total dissolved solids (TDS) of a process stream that is within the 0.00 to 19.99 ppm (mg/L) 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 TDS water to flow into a tank being monitored in order to lower its TDS. The BL983321 can also be used to monitor the quality of water produced from ion exchange, reverse osmosis (RO) or distillation.

*The BL983321 uses a 0.5 conversion factor in which 1.00 µS/cm = 0.50 ppm.

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.

Description

BL983321

Adjustable Dry Contact Dosing Relay

The BL983321 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.
BL983321

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.

HI7634

1/2″ NPT Male Threaded Amperometric Probe for Mounting In-line*

The BL983321 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 0.25 kg
Parameter

Conductivity/TDS

TDS Accuracy

±2% f.s.

TDS Calibration

manual, with CAL trimmer

TDS Range

0.00 to 19.99 ppm (mg/L)

TDS Resolution

0.01 ppm (mg/L)

Specifications

SKU BL983321-0
Name TDS Mini Controller (0.00 to 19.99 ppm) – BL983321-12VDC
TDS Range 0.00 to 19.99 ppm (mg/L)
TDS Resolution 0.01 ppm (mg/L)
TDS Accuracy ±2% f.s.
TDS Calibration manual, with CAL trimmer
EC/TDS Temperature Compensation automatic from 5 to 50°C (41 to 122°F) with β =2%/oC
EC to TDS Conversion Factor 0.5
EC/TDS Dosing Relay maximum 2A (fuse protected), 250 Vac, 30 VDC
EC/TDS Dosing Set Point adjustable from 0 to 19.99 mg/L (ppm)
Over Dosing Control adjustable, typically from 5 to approximately 30 minutes
Power Supply models “-0”: 12 VDC adapter (included)
models “-1”: 115/230 VAC; 50/60Hz
Dimensions 83 x 53 x 99 mm (3.3 x 2.1 x 3.9”)
Weight models “-0”: 200 g (7.1 oz.) models “-1”: 300 g (10.6 oz.)

Ordering Info

BL983321-1 (115/230 VAC) and BL983321-0 (12 VDC) are supplied with mounting brackets, transparent cover and instruction manual.

Manuals

TDS Mini Controller (0.00 to 19.99 ppm) – BL983321-12VDC