Water Toxicity & Heavy Metal Monitoring System

A site-based analyser that measures the chemical toxicity of a water source continuously rather than at intervals. Other on-line toxicity monitors take an intermittent sample and return one result every fifteen to thirty minutes. The CTM takes two measurements per second, which materially reduces the chance of a brief event passing unrecorded.

• Four-week autonomous operating cycle with no manual intervention between monthly maintenance
• Responds to metals, pesticides, fungicides, herbicides, chlorinated solvents and industrial chemicals
• Detects synergistic toxicity events, so harmful combinations show up without running a suite of individual tests
• Diagnoses and reports its own system faults
• Broad-range detection whether or not the source of contamination is known in advance

Where the CTM answers whether the water is toxic, the OVA7100 answers which metal is present and at what concentration. It uses voltammetry, an internationally accepted alternative to sending samples away for laboratory analysis, and runs unattended at a remote intake, a process stream or a discharge point.

• Configurable for up to 23 different metals, with up to six measured in a single cell unit
• Dual-cell configuration adds a second analytical cell for up to ten metals in one instrument
• Detection at single figure microgram-per-litre levels, typically 0.5 to 5 µg/l
• High frequency round-the-clock measurement isolates short events that daily average sampling misses
• Colour and turbidity do not affect the method
• Connects to the control room for automatic dosing adjustment or flow diversion on alarm
• Solid electrodes with no hazardous mercury drop electrode

A bench analyser for rapid acute toxicity testing, built on the same bioluminescence method as the rest of the Microtox range. Results are available in as little as fifteen minutes after initial sample preparation, against the ninety-six hours a conventional bioassay can require.

• Sensitive to thousands of simple and complex chemicals
• Automatic colour correction adjusts results for sample turbidity and can be switched off when not needed
• Actively cooled reagent, incubator and read wells hold temperature stable across a run
• Standard protocols include Basic Toxicity, Screening, Comparison, Confirmation, SOLO Screening, Solid Phase and WET
• Runs to ISO 11348-3, ASTM D5660 and DIN 38412 reference methods
• Results correlate closely with conventional bioassay tests such as fish and daphnia

A one-kilogram field instrument combining two detection modes in a single unit. Acute toxicity screening covers toxic chemicals, and ATP measurement covers microbial contamination, which together address the two most probable classes of agent in a drinking water emergency or a chemical spill.

• Reliable results five minutes after initial sample preparation
• Sensitive to thousands of simple and complex chemicals
• Battery life of eight to ten hours in typical use, so a full sampling day does not depend on mains power
• Lightweight with a sturdy field carrying case
• Stores approximately 600 reads for USB download

The field counterpart to the OVA7100, using the same voltammetric method in a case you can carry to the sample. That changes how a site investigation works. Instead of taking a fixed number of samples and waiting a fortnight for results, you take a reading, move upstream, take another, and locate the source in a single visit.

• Configurable for up to 24 different metals in a single instrument
• Analyse in the field or the laboratory down to 0.5 µg/l, below drinking water regulations for many target metals
• Supplied with a tablet running preloaded analysis menus and step by step instructions
• Runs on AA batteries, a DC transformer or mains, so remote sites are not a problem
• Speciation of selected metals by lability and oxidation state
• Correlates well with laboratory methods such as AAS and ICP-MS at much lower capital and operating cost