Define what needs to be measured
State the parameter, expected range, units and sample conditions. Decide whether the reading supports routine observation, control or an acceptance check. Request the device documentation for accuracy, calibration and installation requirements. Include any communication or control output needed by the existing system. Keep the instrument identity connected to the measurement point in operating records.
The measurement and the sample define instrument selection
Select a water-quality instrument for a parameter, range and measurement position. Portable checks and online monitoring are different operating arrangements. Confirm the sample conditions, calibration requirements and any output signal needed by the control system. The instrument reading should remain connected to its identity, units and measurement point in the operating record.
| Requirement | What to compare | What to confirm |
|---|---|---|
| Portable checks | Review field use and required parameter | Plan calibration and record the sampling point |
| Online monitoring | Review installation and process conditions | Confirm sensor, transmitter and outputs |
| Laboratory analysis | Review questions not answered by the installed meter | Use an appropriate test programme |
A selection mistake to avoid
Do not treat a conductivity or pH result as a complete water-quality assessment. Each instrument answers a defined measurement question.
What should an instrument replacement enquiry include?
The parameter, expected range, sample conditions, sensor and transmitter identity, installation connection and required communication or control output.
Planning the enquiry in Sabah
SWFI lists liquid analyzers, flow meters and related instrumentation. Provide the application and current instrument details with the enquiry. For replacement work, include the sensor, transmitter and connection arrangement where relevant. Plan access for calibration and maintenance so a useful measurement remains available after installation.
Information to prepare
- Parameter, range, units and sample conditions
- Portable or online measurement requirement
- Calibration, connections and output signals
Can a conductivity instrument replace every laboratory test?
No. It measures a defined parameter. Other water-quality questions may require different instruments or laboratory analysis.
Discuss your requirement with SWFI
Share your site location and the information listed above. SWFI can review the requirement; equipment selection, supply and service scope are subject to technical suitability and confirmation.
Request a consultationNeed a specific component? →Technical background and SWFI scope: SWFI: systems, equipment and service information. Equipment-specific limits should be checked in the current manufacturer documentation.
Related SWFI products
Options relevant to this guide. The final model and configuration should match the application, water conditions and current availability.
Liquid Analyzer
Portable PHP-100 pH / ORP Meter
Portable pH/ORP measurement for the relevant sampling requirement.
View product details →
Liquid Analyzer
Portable ECP-100 Conductivity / Resistivity / TDS Meter
Portable conductivity/resistivity/TDS readings for a defined test purpose.
View product details →
Liquid Analyzer
NTU-100 Online Turbidity Meter (Low Range)
Online turbidity measurement for a specified monitoring duty.
View product details →