- Easy to handle
- Fire retardant casing
- Selectable overdose protection system
- Splash resistant cover
Dosing Relay: Contact close when measure: > set point
This instrument has been designed for TDS control in hydroponics, horticulture and water conditioning. Compact in size, it can be mounted in confined spaces or even right next to the vat or barrel containing the chemicals. These meters permit automatic control of installations previously checked manually.
Readings are shown on the display and the multicolored LED continuously indicates if the mini controller is in measurement, dosing or alarm mode.
Users can choose automatic or manual dosing mode with a switch on the front panel. Manual control is particularly useful during maintenance operations, because it permits operators to enable or disable the dosing relay according to your need.
The overtime control system advises users when the relay is active too long, helping to prevent over dosage.
Order Information:
The BL 983321-1 is supplied with mounting brackets, transparent cover, and instructions.
Manual: Download
Specification :
| Range | 0 to 19.99 ppm | |
| Resolution | 0.01 ppm | |
| Accuracy @ 25°C | ±2% F.S. | |
| TDS Conversion Factor | 0.5 | |
| Probe | HI 7634-00 EC/TDS probe with internal temperature sensor and 2 m (6.6’) cable (not included) | |
| Temperature Compensation | Automatic, 5 to 50°C (41 to 122°F) with ß = 2%/°C | |
| Calibration | manual, with CAL trimmer | |
| Dosing Relay | maximum 2A (fuse protected), 250 Vac, 30 VDC Contact close when measure: > set point | |
| Setpoint | adjustable from 0 to 19.99 ppm | |
| Overtime | adjustable, typically from 5 to approx. 30 minutes | |
| Power Supply | See Chart | |
| Dimensions | 79 x 49 x 95 mm (3.1 x 1.9 x 3.7’’) |
HI706 Checker HC ® - Phosphorous, HR
เครื่องวัดปริมาณฟอสฟอรัส ช่วงสูง รุ่น HI706
HI711 Checker HC ® - Total Chlorine
HI727 Checker HC ® - Color of Water
HI715 Checker HC ® - Ammonia, MR
HI771 Checker HC ® - Chlorine, Ultra-High Range
เครื่องวัดปริมาณโบรมีน ในตัวอย่างน้ำ รุ่น HI716
HI5013 - 13.00 pH@25°C - TQ - 500ml
HI7030L - EC 12880 µS/cm@25°C - 500ml
BL983329-1 TDS Mini Controller 0.0 to 999 mg/L (ppm) - 230V
HI7075 Electrode filling solution 1.7M KNO3 + 0.7M KCl, 4 x 30 ml
เครื่องควบคุมค่าความนำไฟฟ้า
เครื่องวัดคุณภาพน้ำ รุ่น HI5522 (pH/ORP/ISE และ EC/TDS/Salinity/Resistivity พร้อมโหมด CAL Check™)
HI9812-5 Multiparameter pH/EC/TDS/°C - EC to1990 µS/cm
HI775 Checker HC ® - Alkalinity in fresh water (dKH)
HI5522 Research Grade pH/ORP/ISE and EC/TDS/Salinity/Resistivity Meter with CAL Check™
เครื่องวัดปริมาณฟอสเฟต ช่วงสูง รุ่น HI717 




