🟦 1. BASIC PHYSICAL PARAMETERS
🔹 Flow Measurement
- Electromagnetic Flow Meter (Mag Flow Meter)
- Ultrasonic Flow Meter
- Turbine Flow Meter
- Rotameter (variable area)
- Open Channel Flow Meter (Parshall flume, V-notch)
Parameters: Flow rate, total flow
🔹 Level Measurement
- Ultrasonic Level Transmitter
- Radar Level Transmitter
- Hydrostatic / Pressure Level Transmitter
- Float Level Switch
- Conductive Level Switch
Used in: Tanks, sumps, equalization tanks
🔹 Pressure Measurement
- Pressure Gauge
- Pressure Transmitter
- Differential Pressure Transmitter
Used in: Filters, RO systems, pipelines
🟦 2. CORE WATER QUALITY PARAMETERS (ONLINE / FIELD)
🔹 pH & ORP
- pH Analyzer
- pH Transmitter
- ORP (Oxidation Reduction Potential) Analyzer
Used in: Neutralization, biological treatment, RO feed
🔹 Conductivity & TDS
- Conductivity Analyzer
- TDS Analyzer
- Resistivity Meter (DM water)
🔹 Turbidity & Solids
- Turbidity Meter / Analyzer
- Suspended Solids (SS / TSS) Analyzer
- Sludge Blanket Level Analyzer
🔹 Temperature
- RTD (PT100)
- Thermocouple
- Temperature Transmitter
🟦 3. DISSOLVED GASES & OXYGEN
- Dissolved Oxygen (DO) Analyzer
- Oxygen Gas Analyzer
- Carbon Dioxide (CO₂) Analyzer
- Hydrogen Sulfide (H₂S) Analyzer
Critical for: Aeration tanks, MBR, biological processes
🟦 4. NUTRIENTS & ORGANIC LOAD
🔹 Organic Pollution
- COD Analyzer (online & lab)
- BOD Analyzer (mostly lab-based)
- TOC Analyzer (Total Organic Carbon)
🔹 Nutrients
- Ammonia (NH₃ / NH₄⁺) Analyzer
- Nitrate (NO₃⁻) Analyzer
- Nitrite (NO₂⁻) Analyzer
- Total Nitrogen (TN) Analyzer
- Phosphate (PO₄³⁻) Analyzer
- Total Phosphorus (TP) Analyzer
🟦 5. DISINFECTION & OXIDANTS
- Free Chlorine Analyzer
- Total Chlorine Analyzer
- Chlorine Dioxide Analyzer
- Ozone Analyzer
- UV Intensity Sensor
🟦 6. SALTS, IONS & METALS
🔹 General Ions
- Sodium Analyzer
- Fluoride Analyzer
- Silica Analyzer
- Sulfate Analyzer
🔹 Heavy Metals (Mostly Lab / Advanced)
- Online Heavy Metal Analyzer
- Atomic Absorption Spectrometer (AAS)
- ICP-OES / ICP-MS
- Colorimeter / Photometer
🟦 7. SLUDGE & SOLIDS CHARACTERISTICS
- MLSS Analyzer
- MLVSS Analyzer
- Sludge Density Meter
- Sludge Interface Meter
- Sludge Volume Index (SVI – lab test)
🟦 8. MEMBRANE & FILTRATION MONITORING
- Differential Pressure (DP) Transmitter
- Silt Density Index (SDI) Test Kit
- Particle Counter
- Turbidity Analyzer (RO feed & permeate)
🟦 9. CHEMICAL DOSING & PROCESS CONTROL
- Chemical Dosing Pump Stroke Indicator
- Flow-paced Dosing Controller
- Residual Chemical Analyzer
- Jar Test Apparatus (lab)
🟦 10. LABORATORY ANALYTICAL INSTRUMENTS
(Used in plant labs)
- pH Meter (bench type)
- Conductivity Meter
- Turbidity Meter
- Spectrophotometer
- BOD Incubator
- COD Reactor
- Muffle Furnace
- Analytical Balance
- Titration Unit
🟦 11. BIOLOGICAL & MICROBIOLOGICAL
- Coliform Test Kit
- E. coli Analyzer
- ATP Analyzer
- Microscope (sludge analysis)
🟦 12. CONTROL & DATA SYSTEMS (Not analyzers but essential)
- PLC (Programmable Logic Controller)
- SCADA System
- Data Logger
- HMI Panels
✅ QUICK REFERENCE – MOST IMPORTANT ONLINE INSTRUMENTS
| Parameter | Instrument |
| pH | pH Analyzer |
| TDS | Conductivity Analyzer |
| Flow | Mag Flow Meter |
| DO | DO Analyzer |
| Turbidity | Turbidity Analyzer |
| COD | Online COD Analyzer |
| Chlorine | Residual Chlorine Analyzer |
| MLSS | MLSS Analyzer |
🎯 INDUSTRY PRACTICE (Very Useful)
- WTP: pH, turbidity, chlorine, flow, conductivity
- STP: pH, DO, MLSS, COD, NH₄, NO₃
- ETP: pH, ORP, COD, TOC, heavy metals
- RO/ZLD: Conductivity, SDI, DP, silica