Hanna Instruments-9934-2 Hydroponics Wall Mounted TDS Controller

Hanna InstrumentsSKU: HI-9934-2

Sale price£656.50
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Hydroponics wall-mount Total Dissolved Solids controller with proportional setting.

This wall mounted meter controls TDS in the 0 to 1999 ppm (mg/L) range through a single set point for dosage of fertilizers. The proportional control can be fine tuned through the time cycle between 0 to 90 seconds and the proportional band from 0 to 400 ppm.

Coarse and fine as well as a slope trimmer make for an accurate setting and calibration. A pump or electro-valve can be powered through the terminal. In addition to the set point relay.

Hanna Instruments-9934 also provides for an alarm relay. The alarm is activated when the measurements exceed the set point by a user-selectable margin in the 50 to 450 ppm range. The alarm also goes off due to a malfunction, the continuous dosing time exceeds the operator adjustable period of 1 to 10 minutes. The alarm can be configured in either normally-closed or normally-open position and turned off during maintenance.

HI 9934 also provides an isolated output signal which is user selectable between 0-20 or 4-20 mA.

HANNA 4-ring TDS probes with incorporated temperature sensor and DIN connector can be quickly attached to the controller. Readings are automatically compensated for temperature variations in the 0 to 50°C (32 to 122°F) range.

The extractable terminal wiring is through the side of the meter with washers and grommets. The compartment containing the connections is closed behind a fire-retardant ABS panel.

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