Nutrient regulator designed to keep the concentration of the nutrient solution used in hydroponics and irrigation water monitored. The HI981413 uses an amperometric conductivity sensor to measure the amount of fertilizer in the solution. The instrument can be programmed to display results as EC (electrical conductivity) or as TDS (total dissolved solids). EC results are displayed as mS / cm while TDS is displayed as ppm with a selectable conversion factor from 0.45 to 0.99. HI981413 was developed as an economical solution for hydroponic systems to maintain ideal concentration levels of fertilizers in nutrient solutions.
| Temperature Range |
-5.0 to 105°C (23.0 to 221.0°F) |
| Temperature Resolution |
0.1°C (0.1°F) |
| Temperature Accuracy (@25°C/77°F) |
±0.5°C (±0.9°F) |
| EC Range |
0.00 to 10.00 mS/cm |
| EC Resolution |
0.01 mS/cm |
| EC Accuracy (@25°C/77°F) |
±2% F.S. |
| TDS Range |
0 to 4500 ppm (TDS conversion factor 0.45)
0 to 9900 ppm (TDS conversion factor 0.99) |
| TDS Resolution |
1 ppm |
| TDS Accuracy (@25°C/77°F) |
±2% F.S. |
| TDS Conversion Factor |
TDS conversion factor selectable from 0.45 to 0.99 |
| Temperature Compensation |
automatic |
| Temperature Coefficient |
β can be set from 0%/°C to 2.4%/°C; default is 1.9%/°C |
| Calibration |
EC: user calibration: automatic, one-point with standard solution (1.413 or 5.000 mS/cm)
Process calibration: single point, adjustable (±0.50 mS/cm around measured value)
TDS: through EC calibration |
| Pump Control |
selectable flow rate (0.5 to 3.5 L / hour; 0.13 to 0.92 G/hour)
manual control for pump priming |
| Alarms |
high and low with enable / disable option
triggered after 5 sec. if controller records a set of consecutive readings over / under threshold values level with enable / disable option
overtime protection (1 to 180 min. or off)
intuitive alarm system using red, light green, and green color-coded backlight |
| External Event Input |
input for level controller or flow switch to disable dosing pump in the event of no chemical when using a level controller or no flow when using a flow switch – galvanically isolated |
| Alarm Relay Output |
SPDT 2.5A / 230 VAC |
| Power Supply |
100—240 VAC, 50/60 Hz |
| Power Consumption |
15 VA |
| Casing |
wall mounted, built-in pump, IP65 rated |
| Environment |
0-50°C (32-122°F), max. 95% RH non-condensing |
| Dimensions |
90 x 142 x 80 mm (3.5 x 5.6 x 1.8”) |
| Weight |
910 g (32 oz.) |
Specifications
| Line Name |
Groline |
| Manufacturer |
Hanna Instruments |
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