Description
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
- Measures electrolytic conductivity in the low range of 0.0 to 199.9 µS/cm (resolution: 0.1 µS/cm, accuracy: ±2% full scale).
- Designed for continuous monitoring of water quality in processes like deionized water systems, reverse osmosis (RO), ion exchange, or distillation.
- Includes a dosing relay (max 2A, fuse-protected) that activates when the EC reading exceeds a user-settable setpoint. This relay can control a solenoid valve, dosing pump, alarm, or switch between tanks to maintain low conductivity.
- Supports automatic or manual dosing modes, with programmable overdose protection (overtime shutdown) for safety.
- Features automatic temperature compensation (5–50°C, β=2%/°C).
- Large LCD display with protective cover, multicolor LED status indicator, and fire-retardant casing.
- Uses the HI7634-00 EC probe (sold separately, with various cable lengths).
- Compact dimensions: 83 x 53 x 99 mm.
| Specification | Detail |
| sku | BL983320-web |
| EC Range | 0.0 to 199.9 µ |
| EC Resolution | 0.1 µ |
| EC Accuracy | ±2% f.s. |
| EC Calibration | manual, with CAL trimmer |
| EC/TDS Temperature Compensation | automatic from 5 to 50°C (41 to 122°F) |
| Temperature Correction Coefficient | ² =2%/℃ |
| EC/TDS Dosing Relay | contact closed when measure > setpoint maximum 2A (fuse protected), 250 Vac, 30 VDC |
| EC/TDS Dosing Set Point | adjustable from 0 to 199.9 µ |
| Over Dosing Control | adjustable, typically from 5 to approximately 30 minutes |
| Power Supply | models œ-0in.=12 VDC adapter (included) models œ-1in.=115/230 VAC, 50/60Hz |
| Dimensions | 83 x 53 x 99 mm (3.3 x 2.1 x 3.9™™) |
| Weight | models œ-0in.=200 g (7.1 oz.) models œ-1in.=300 g (10.6 oz.) |
| Ordering Information | BL983320-1 (115/230 VAC) and BL983320-0 (12 VDC) supplied with mounting brackets, transparent cover and instruction manual. |



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