CRONOS®
Key Benefits
The CRONOS®is a very capable analyser and controller and includes;
- Up to 2 sensor inputs – the CRONOS® works with all of Pi’s sensors and many more.
- 8 relay outputs – for alarms and process control.
- Process control – via extremely capable PID loops.
Applications
The CRONOS® is often used in applications where the remote access capability of the CRIUS®4.0 is not required. This doesn’t mean that a CRONOS® doesn’t have the capability of control!
With full PID control, the CRONOS® is often used in application areas such as:
- Water Treatment
- Drinking Water
- Waste Water
- Pool and Spa Control
- Industrial Water
- Food and Drink
- Paper and Pulp
The CRONOS® is a universal controller capable of outputting a PID control signal via an analogue (4-20mA) or a pulse width modulated relay (to control for example, an on/off pump). With the latest in communication options the CRONOS® is capable of running Profibus, Modbus or TCP/IP via Ethernet.
The ability to provide maintenance reminders is very attractive to larger users with multiple operators where it can be easy to miss scheduled maintenance.
The CRONOS® can also come in a multitude of languages making it suitable for use in any market.
Customers requiring additional functionality such as downloadable data logging or remote access via the internet should consider the CRIUS®4.0 controller.
Sensors
A CRONOS® plus Sensor equals…
- Free Chlorine Analyser (HaloSense)
- Total Chlorine Monitor (HaloSense)
- Chlorine Dioxide Analyser (DioSense)
- Ozone Monitor (OzoSense)
- Dissolved Oxygen Meter (OxySense)
- Suspended Solids Monitor (SoliSense®)
- Turbidity Meter (TurbSense®)
- Streaming Current Monitor (StreamerSense)
- pH Analyser (pHSense)
- ORP Analyser (ORPSense)
- Organics Monitor (UV254Sense)
- Online Conductivity Monitor (ConductiSense)
- Particle Counter (CounterSense)
- Pool and Spa Controller (AquaSense)
- Filter Monitor (FilterSense)
- Fluoride Monitor (FluoriSense)
- External inputs
- Choose from Standard Configurations or ‘Build Your Own
Options
CRONOS® from Pi is an extremely capable, yet low cost controller. It’s only limitations are that it is not capable of remote access (that requires a CRIUS®4.0), and it is restricted to 2 sensor inputs. Options available are;
- Colour display
- Datalogging
FAQs
Focus On
Focus Ons are a series of short articles distributed by email providing technical information regarding instrumentation, process measurement in potable, waste, process and pool waters. If you would like to join the mailing list, please contact us.
Chlorine Analysers For Residual Chlorine Monitoring – HaloSense
Key Benefits
- Low purchase cost
- Low cost of ownership
- Reduced pH dependency (largely pH independent)
- Stable and reliable
- Bufferless
- Reagentless
Many water companies want to measure free chlorine residuals without the need for chemical buffers traditionally associated with such measurements. Acetate and phosphate buffers are expensive and environmentally unfriendly. Buffer delivery systems are maintenance intensive and have fairly costly consumables and there are health and safety considerations in the handling of the acids and high disposal costs if the acid treated water is unable to be fed back into the water supply.
Amperometric cells and most polarographic probes only respond to hypochlorous acid, (HOCl). HOCl dissociates into hypochlorite (OCl–) in a pH dependent manner. This is why most chlorine monitors need acid buffers in most applications. The typical pH of water measured on a water treatment works may range from 7 to 9.2. Chemical buffering reduces the pH to between 5 and 6 and ensures that the majority of the residual chlorine is present as HOCl (see graph below).
The HaloSense Free Chlorine Sensor measures all the HOCl and the majority of the OCl– present (blue line on graph). This results in a vastly reduced pH effect and means that most chlorine monitoring applications require no buffer and no pH compensation.
Applications
- Continuous online monitoring for residual chlorine in any water
- Water treatment plant residual chlorine dosing control
- Secondary chlorination free chlorine dosing control
- Distribution monitoring
- Cooling tower monitoring and control
- Pasteuriser dosing control
- Seawater chlorination control
- Bromine monitoring in seawater
- Food washing
- Chloramination control
The HaloSense chlorine monitor range is particularly suited to working in sites where reliability and ease of use are most important.
Options
The following are available in the HaloSense range;
- Online free chlorine – 0.005-2ppm, 0.05-5ppm, 0.05-10ppm, 0.05-20ppm, 0.5-200ppm
- Online total chlorine – 0.005-0.5ppm, 0.005-2ppm, 0.05-5ppm, 0.05-10ppm, 0.05-20ppm
- Online residual chlorine in seawater analysers (free or total bromine) – 0.005-2ppm, 0.05-5ppm, 0.05-10ppm, 0.05-20ppm
- Online zero chlorine (designed to measure the absence of free chlorine) – 0.005-2ppm for applications such as post activated carbon and pre-RO monitoring.
Other options include;
FAQs
Downloads
Documents
HaloSense
HaloSense Zero
HaloSense Hints and Tips
Potential Savings when Choosing Amperometric Chlorine Measurements over online DPD
Seawater Chlorination
ORP vs. ppm
pH Effects on Pi’s Free Chlorine Sensor
pH Compensation of a Residual Chlorine Measurement
Free Chlorine Probe Maintenance
Total Chlorine Probe Maintenance
Using Open Flow Cells with Membraned Sensors
DPD Checklist
Probe Fouling
Remote Access – Control InSite – CRIUS®4.0
Key Benefits
Control InSite from Pi is the remote access solution for the CRIUS®4.0 range of analysers. Probably the most capable analyser/controller remote access on the market and allows the user to;
- Remote set-up – all setpoints and variables are available via the cloud based Control InSite making remote set-up, or adjustment, quick and simple.
- Remote process optimisation – sometimes a process changes and the PID control needs to be adjusted. With Control InSite, this is all done simply and quickly from anywhere in the world.
- Remote data download – collect your data remotely for analysis and interpretation.
- Remote troubleshooting – either alone or in conjunction with others, troubleshoot any issue that arises on site without travelling.
In addition, Control InSite is free to use and doesn’t require installation of any specialist software, simply accessed via any web browser.
Focus On
Focus Ons are a series of short articles distributed by email providing technical information regarding instrumentation, process measurement in potable, waste, process and pool waters. If you would like to join the mailing list, please contact us.
FAQs
Certifications
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ISO9001
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ISO45001
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ISO14001
Industries We Serve
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Food & Drink
Including: Chlorine Analyzers, Peracetic Acid Analyzers, Chlorine Dioxide Analyzers, Turbidity Meters, and more.
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Industrial Water Treatment
Including: ClO2, Conductivity, Disinfectants, Hydrogen Peroxide, Multi-Parameter and pH.
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Municipal Drinking Water
Including: Coagulation Controllers, Chlorine Analyzers, Ozone Analyzers, Online pH Meters, and more.
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Paper & Pulp
Including: Charge Analyzers, Chlorine Dioxide Analyzers, Multi-Parameter Analyzers, Suspended Solids Monitors, and more.
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Wastewater
Including: Online pH Meters, Dissolved Oxygen Meters, Suspended Solids Meters, MLSS SAS RAS Meters, Turbidity Meters, and more.
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OEMs
Pi is working with approximately 30 OEM organizations worldwide who take the CRIUS®4.0 and use it’s features to add value to their own product or service
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Spa's & Pools
AutoPool and AutoPool 4.0 has now replaced AquaSense. Visit our Pools division company Process Pools for details
