EMEC Online Analyzer Supplier in Bangladesh
EMEC online analyzer controllers from Italy for continuous pH, DO, TDS and chlorine monitoring in ETP, WTP and STP plants, supplied with installation and after-sales support by Techno Bangla Creation.
What Is an Online Analyzer?
An online analyzer is a controller that measures water quality continuously, straight from the pipe, tank or channel. It reads parameters such as pH, dissolved oxygen (DO), TDS, chlorine, turbidity and TSS, shows them on a display and sends a 4-20 mA or RS485 signal to a PLC, PC or automatic dosing system.
An online analyzer is not a handheld meter. A handheld meter gives one reading of one sample when someone takes it, while an online analyzer watches the process all day. For the chemical feed side, see our EMEC dosing pump page.
- Continuous measurement for auto dosing systems
- Large LCD with programmable illumination
- 4-20 mA and RS485 outputs for PLC and PC
- Installation and after-sales support in Bangladesh
EMEC Online Analyzer Specifications
- Type
- Online analyzer controller for auto dosing systems
- Parameters
- pH, DO, TDS, Temperature, Chlorine, Turbidity, TSS (depends on model and sensor)
- Display
- Large LCD with auto-sense ON/OFF programmable illumination
- Signal output
- 4-20 mA, RS485 (for PC and PLC)
- Mounting
- Wall, Pipe and Panel mounted
- Brand
- EMEC
- Origin
- Italy
Exact parameters, ranges, relay outputs and sensor type depend on the model you select. Send us your parameter list and our engineers will confirm the right configuration.
Online Analyzer vs Manual Testing
Many Bangladesh plants still check pH and DO by hand. Here is how the two methods differ.
| Feature | Online Analyzer | Manual / Handheld Testing |
|---|---|---|
| Reading frequency | Continuous, all day and night | Only when someone takes a sample |
| Sample effects | Measured in the process at its real temperature | Grab samples can change with temperature or gas loss before the reading |
| Automation | 4-20 mA or RS485 signal to a PLC or dosing system | Manual logging and manual chemical adjustment |
| Catching pH swings | Sees swings between checks, which matters for varying textile effluent | Can miss swings that happen between visits |
| Upkeep | Sensor cleaning and regular calibration against buffers or a verified reference | Meter calibration and staff time for every test |
| Initial cost | Higher | Lower |
| Best fit | Variable effluent, long running hours, automatic dosing | Small, stable flows with occasional checks |
Keep a calibrated handheld meter even with an online analyzer, because grab-sample checks are the normal way to verify the online reading. Always confirm details on the datasheet of the exact model.
How an Online Analyzer Works
- Sensor Sits in the ProcessA pH, DO, conductivity or chlorine sensor is fitted in the pipe, tank or channel.
- Sensor Sends a SignalThe sensor produces a small electrical signal that changes with the water condition.
- Controller Converts ItThe controller turns the signal into a reading in pH, mg/L or µS/cm and applies its calibration.
- Display and OutputThe LCD shows the value while a 4-20 mA or RS485 signal goes to the PLC or PC.
- Dosing RespondsThe control system adjusts a chemical dosing pump to bring the value back to its target.
Key Benefits
Treatment plants run better when the operator can see the water quality as it changes.
- Continuous readings show pH swings that spot checks miss. One study of Bangladeshi textile effluent reported pH from about 5.6 to 11.6
- 4-20 mA and RS485 outputs connect to PLCs, PCs and automatic dosing systems
- Tighter pH control helps keep treated water inside the discharge limit and supports neutralization dosing
- DO monitoring helps operators avoid over-aeration, which wastes blower energy
- Large LCD with programmable illumination and wall, pipe or panel mounting
- Italian EMEC brand with local supply, installation and after-sales support from Techno Bangla
Do You Need an Online Analyzer?
Choose an Online Analyzer When
- Effluent pH or load changes during the day
- You dose acid, alkali or disinfectant automatically
- The plant runs around the clock with few operators
- You need data sent to a PLC or PC for records
- The buyer or regulator expects proof of controlled discharge
Stay with Manual Testing When
- The plant is small and the flow is steady
- Water quality rarely changes between checks
- Nobody will clean and calibrate the sensor on schedule
- Budget allows only a handheld meter for now. See our flow meter range for other monitoring steps
Where Online Analyzers Are Used
Any process where pH, oxygen, dissolved solids or chlorine must stay inside a set range.
- ETP Effluent pH Control
- Neutralization Tank
- Aeration Tank DO
- WTP
- STP
- Textile Dyeing and Washing
- Pharmaceutical
- Food and Beverage
- Cooling Tower
- Chlorine Disinfection
How to Choose the Right Online Analyzer
Share these details with our engineers and we will recommend a suitable model and sensor.
- Parameters and range. List what you must measure: pH, DO, TDS, chlorine, turbidity or TSS. One controller may not cover every parameter, so confirm the model.
- Sensor type. For DO, manufacturers describe galvanic sensors as cheaper and faster, and optical sensors as longer-lived but costlier. For pH in wastewater, non-porous junction electrodes are reported to last longer than porous ones.
- Sample point. Fit the sensor where the water is well mixed and flowing. Calibration cannot fix a blocked or unrepresentative sample line.
- Signals and integration. Match 4-20 mA or RS485 to your PLC, PC or dosing pump.
- Cleaning and calibration plan. Keep buffer solutions, spare sensors and a named person. Fit the controller in a clean, dry panel or wall box suited to humid, dusty plant rooms.
Why Online Monitoring Matters for Bangladesh ETPs
Discharge standards under the Environment Conservation Rules list a pH band of 6 to 9 for treated textile effluent going to inland surface water. Textile dyeing is required to have an ETP, and raw dyeing wastewater can swing well outside that band.
In July 2026 the government said it plans to bring ETPs of discharging industries under an online monitoring system. Rules change, so check your clearance conditions. See our ETP plant page for complete plant solutions.
Installation and After-Sales Support
EMEC is an Italian company founded in 1982 in Rieti that makes dosing pumps, control systems and sensors for water treatment. Techno Bangla Creation supplies these instruments with installation, commissioning and after-sales support across Bangladesh.
Our team is based in Mohakhali, Dhaka. Send your parameter list and our engineers will recommend a suitable analyzer. Pair it with an EMEC dosing pump for a complete automatic dosing loop.
Frequently Asked Questions
What is an online analyzer?
An online analyzer is a continuous water-quality instrument that reads parameters such as pH, dissolved oxygen, TDS, chlorine or turbidity directly from the process instead of from a lab sample. The controller shows the value on a display and sends it by 4-20 mA or RS485 to a PLC, PC or dosing system.
What parameters does the EMEC online analyzer measure?
The EMEC online analyzer controller we supply is used to measure pH, DO, TDS, temperature, chlorine, turbidity and TSS for auto dosing systems. Which parameters one unit handles depends on the model and the sensor connected, so send your parameter list and we will confirm the configuration from the datasheet.
What is the difference between an online analyzer and a handheld meter?
An online analyzer measures continuously in the pipe or tank and can feed alarms and dosing. A handheld meter gives a spot reading of a grab sample. Grab samples can change with temperature or gas loss before measurement, and manual checks miss swings between visits. Most plants keep a handheld meter to verify the online reading.
How often does an online pH sensor need calibration?
It depends on the water and the sensor. One US state rule sets calibration at least weekly for continuous pH monitors, and dirty wastewater may need more. A common starting point is weekly checks against buffers such as pH 4, 7 and 10, then adjusting the interval from your own drift records.
Should I choose an optical or galvanic DO sensor?
Manufacturers describe galvanic sensors as cheaper, faster and lower in power use, and optical sensors as longer-lived but costlier. Hydrogen sulfide in wastewater can affect galvanic membranes. The right choice depends on your tank and budget, and sensor options differ by model, so confirm on the datasheet.
Is online pH monitoring required in Bangladesh?
Discharge standards list pH 6 to 9 for treated textile effluent to inland surface water, and ETPs are required for textile dyeing. In July 2026 the government said it plans online monitoring of ETPs. Check your current rules and environmental clearance conditions to see what applies to your factory.
Can the analyzer control a dosing pump?
Yes, automatic dosing is its main use. The controller reads pH or another parameter and sends a signal, through 4-20 mA or RS485, to your control system or dosing pump so acid, alkali or disinfectant is added to hold the target. Confirm relay and setpoint outputs for your model on the datasheet.
How can I get a quotation for an EMEC online analyzer?
Send your required parameters, mounting type and output signal to our engineers by phone or email. We reply with a free quotation for your ETP, WTP, STP or water treatment equipment.
