Updates

An unexpected analyser value should start a defined investigation, not a scramble. Agree the response route, sample checks and escalation before commissioning.

Free and total chlorine are not interchangeable results. Define the measurand, sample point and response plan before specifying an online monitor.

Two sample streams can show a process relationship that one location cannot. First define what the comparison should prove and how it will be maintained.

Plan an online analyser sample system for suspended solids by defining the measurement objective, filtration trade-offs, utilities and maintenance checks.

A good online monitoring project begins with the water that reaches the analyser. Use this practical framework to define a representative sample point.

Online and laboratory water-analysis results can differ for valid reasons. This guide explains how to compare like with like before diagnosing a fault.

Orthophosphate and total phosphorus are not interchangeable. This guide explains how to frame the monitoring question, sampling arrangement and analyser brief.

Check sampling, conditioning, mounting, utilities, outputs, reagents, drainage and commissioning before installation.

Plan method-specific reagents, standards, automatic routines and preventive maintenance for a 3S online colorimetric analyser.

Define ammonia, ammonium and NH4-N correctly by stating the measurand, reporting basis, units, matrix and comparison method.