Interesting Article: "Monterey Bay Aquarium reels in the perfect Automation Solution"
What is a Thermocouple?
What is PID Control?
What is pH?
Back to Basics: Understanding pH Measurement
pH Measurement Thermal Characteristics
Temperature Compensation of pH
pH Buffers Thermal Characteristics
What is ORP?
What is Conductivity?
What is Dissolved Oxygen (D.O.)?
Dissolved Oxygen in Aquaculture
Dissolved Oxygen Probes and Measurements
How to Calibrate ORP Electrodes
Cleaning pH/ORP Electrodes
All about Hydrometers and Specific Gravity
Advantages of Flat-surface Electrodes
Understanding Chemical Dosing Pumps
Understanding Viscosity
Understanding Practical Water Chemistry
Understanding PLC's
Understanding RS-485 Networks
What do the NEMA Enclosure Type Numbers mean?
10 Steps for Effective Troubleshooting
General Guidelines for an Optimum Aquarium
Understanding RO/DI Systems
|
MORE Conversions... |
| TDS(ppm) | EC(uS/cm) | of | HARDNESS |
| 0-70 | 0-140 | 0-7 | Very Soft |
| 70-150 | 140-300 | 7-15 | Soft |
| 150-250 | 300-500 | 15-25 | Slightly Hard |
| 250-320 | 500-640 | 25-32 | Moderately Hard |
| 320-420 | 640-840 | 32-42 | Hard |
| above 420 | above 840 | above 42 | Very Hard |