Industrial Grade TDS Controller with Proportional Fertilizer Dosing$595.00
HI9934 is a wall mounted meter that measures and controls TDS in a variety of process control requirements; especially those in horticultural, hydroponics and agricultural applications. A single set point allows for proportional dosage of fertilizer solutions.
- Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption.
- Readings are automatically compensated for the effects of temperature for more accurate results.
- See the controller's status, even from a distance, by observing the dosage or alarm LED's.
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Triple Contact Alarm System
When activated, the alarm contacts will open or close, triggering the mechanism of your choice, whether a buzzer, light or any other electrical device.The alarm is activated when the measurements exceed the set point by a user selectable margin from 50 to 450 mg/L (ppm).
The controller operates with the optional Hanna 4-ring probes to provide a linear and repeatable measurement. The conductivity probe can be installed quickly and easily. Simply plug the DIN connector into the socket and tighten the retainer ring.
Fail Safe Alarm System
Hanna’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. An alarm condition is indicated by a red LED, located directly on the front panel of the controller.
With proportional control, you can fine tune your treatment plant and minimize the use of chemicals. The proportional settings can be fine tuned through two conveniently positioned dials on the front panel. The time cycle is adjustable from 0 to 90 seconds and the proportional band from from 0 to 400 ppm.
Extractable Terminal Modules
The extractable terminal modules make wiring the controller to equipment easy to do.
This controller is housed in a rugged, modular, fiber-reinforced ABS housing.
Specification Name Detail Sku HI9934-1 TDS Range 0.00 to 1999 ppm (mg/L) TDS Resolution 1 ppm (mg/L) TDS Accuracy (@20°C/68°F) ±2% F. S. Typical EMC Deviation ±2% F. S. Calibration Through "ZERO CAL" and "SLOPE CAL" trimmers Setpoint Range From 0 to 1999 ppm (mg/L) Proportional Control TDS from 0 to 400 ppm and time cycle from 0 to 90 seconds Alarm Contacts Terminals can be configured as normally open or normally closed (isolated output Max. 2A, Max. 240V, resistive load, 1,000,000 strokes). The alarm is activated if TDS exceeds by more than the userselectable interval (0 to 400 ppm) from the setpoint or due to overdosage. Dosing Terminals Relay (115 to 240V, Max.2A, 1,000,000 strokes) are activated whenever TDS falls below the setpoint Power Supply 220/240V or110/115V at 50/60Hz Environment $-10 to 50°C (14 to 122°F); RH max 95% non-condensing Enclosure/ Case Material Fiber-reinforced, self-extinguishing ABS Dimensions 181 x 221 x 142mm (7.1 x 8.7 x 5.6") Weight 1.6 Kg (3.5 lb.)
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