Online Monitoring
Instrument details
Continuous, real time heavy metal monitoring
The OVA is the most accurate and flexible online system for
continuous heavy metal monitoring available today. The system has
a wide ranging capability including:
- Monitoring wastewater discharges to minimise the risks of exceeding
consent limits and heavy fine being levied
- Monitoring river water to immediately identify sources of heavy
metal pollution
- Monitoring drinking water to protect from potential metal contamination
- Improving process control through real time feedback in mining
and metal processing industries
Cogent technology is well proven with installations now running
for in excess of 13 years. The system used by Cogent Environmental
has no need for elemental mercury, significantly minimising potential
contamination risks and disposal costs.
Data is accessible either via the built in PC or remotely via
intra or internet. Alarm relay interfaces can also be provided
to trigger process control actions such as ‘cut-off’ valves or
other automated responses.
The OVA is designed to be accurate and robust with a minimum
service requirement. The accuracy and reproducibility of the system
has been proven over a number of years of commercial use in customer
premises.
Simple routine maintenance takes less than 30 minutes per week,
including verification of pump calibration, cleaning the sample
lines and analysis cells. In the unlikely case of component failure,
new ‘modular’ parts are available from local distributors and can
easily be replaced by the user themselves, without the cost of
a service engineer call-out.
Cogent Environmental provide global technical support, where possible
by telephone or email guidance in order to avoid callout costs.
With the customers’ permission our technicians can often make necessary
adjustments to a networked OVA by remote computer access.
Cogent Environmental systems maximise the economic and operational
benefits of online monitoring for heavy metals whilst helping ensure
compliance and environmental protection. Contact Cogent Environmental
today for further information or to discuss an installation.
OVA5000
Of particular interest to industrial (factory) users.
Main Features
- Sensitivity: 0.5–5ppb*
- 24 hour monitoring (up to 6 streams for drinking water)
- Uniquely configured to your application requirements
- Inbuilt computer for flexible data storage and transfer
- State of the art voltammetric analysis by Anodic and Cathodic
stripping voltammetry (ASV/CSV)
- Sample pre-treatment options of acid/ultra violet light digestion
for removal of potential interferences
- Ease of use – trained chemists not required for operation
- Outputs – LAN + 12V alarm. 4-20mA, RS232 optional
- Flexible user configuration for different applications
- Excellent correlation with ICP-MS and AA
- Both standard and bespoke low cost reagents available
- Wide Application Range
- Service contracts available
- Typical metal applications include: Arsenic (As), Cadmium (Cd),
Chromium (Cr), Copper (Cu), Lead (Pb), Iron (Fe) Mercury (Hg),
Molybdenum (Mo), Nickel (Ni), Zinc (Zn)
* Limit of Detection is dependent on metal species and sample
type
Case Study 1
Evaluation of the Cogent Environmental OVA5000 for continuous
Arsenic monitoring at the Vineland Chemical Company Superfund
Site
Cogent Environmental have installed an OVA5000 at the Vineland
chemical company superfund site in New Jersey, USA. This site and
the nearby lake and river have been heavily contaminated with Arsenic.
The instrument has been installed in the wastewater treatment plant
to monitor arsenic levels in the effluent from soil and groundwater
remediation. This study highlights comparison data between the
OVA5000 and the laboratory methods GFAA and ICPMS.
Case Study 2
Continuous Arsenic Monitoring at the Vineland Chemical
Company Superfund Site
This is a follow up to Case Study 1 and details the performance
of the OVA5000 during the first 6 months of operation at the Vineland
Superfund site. The study contains performance data and highlights
the benefits along with the increased efficiency at which the plant
is able to operate.
Case Study 3
OVA 5000 Trial Report for Zinc Smelter. (For Zinc Cadmium
and Lead Analysis)
The first three months operation of an OVA5000 installed at a
Zinc Smelter to monitor Zinc, Cadmium and Lead in the effluent
stream. Contains summary and comparison data with an ICP instrument
To ensure maximum sensitivity and accuracy when using the OVA5000,
use only reagents supplied by Cogent Environmental. We supply a
full range of both standard and bespoke reagents from stock depending
on specific applications.
Supplied in 10 litre containers , OVA5000 reagents are manufactured
to ISO 9000 standards. Cogent Environmental have recently introduced
a range of electrolyte concentrates specifically for the OVA5000.
These offer an improved shelf life, easier storage and significantly
reduced shipping costs.
Standard reagents currently available:
Electrolytes
Supplied as either concentrates or liquids
- CLAC
- Hg Electrolyte
- As Electrolyte
- Mo Electrolyte
Calibration Standards
All calibration standards come in quantities of 1 litre and 1
ppm concentration
The currently available calibration standards are:
- Zn, Cd, Pb as a mixed standard
- Cd, Pb, Cu as a mixed standard
- As, Hg, Cr, Zn, Cd, Pb, Cu and Mo as individual standards
Plating Solutions
For applications that require a thin film plate:
Other Reagents
We have a selection of other reagents currently available including
those for use with the OVA5000 acid digester, contact
us for more information.
Please contact Cogent customer support
to order reagents.
OVA7000
Of particular interest for river-side testing.
Designed for the requirements of the modern industries and the Environmental Monitoring of Heavy Metals. The OVA7000 provides real time data on heavy metal concentrations in surface water, industrial waste waters and process waters.
- Modular construction reduces capital cost
- Low voltage DC operation (AC as Option)
- Internal reserve battery option in case of external supply failure
- Options for wired and wireless communications
- Lightweight robust ABS enclosures offer improved protection
- Reagent section can be separated from analyser for installations where space is limited
- Low detection limits
- Customer programmable sampling interval
For full specification, download the OVA7000 Specification Sheet:
For further information, please contact
us.
