never going to be seen
- Stable and reliable online pH meter
- On board diagnostics
- Auto calibrant recognition
- Low purchase cost
- Long life pH sensors
- Remote access and SMS text alarms
- Remote Sites
- Cooling Towers
- Food Preparation
- Paper Mills
Anywhere you have a requirement to measure pH is a suitable application for the pHSense. The pHSense online pH meter range is particularly suited to working in sites where reliability and ease of use are most important.
Small Water Treatment Plant Monitoring for Chlorine, pH and Turbidity
Small water treatment plants, secondary disinfection plants etc. tend to suffer from similar problems wherever they are in the world. The first is lack of communications SCADA infrastructures, the cost of which to install can be prohibitive. The second is the lack of a central DCS control infrastructure, again the installation of which can be cost prohibitive. The third is the remote location. Often these water treatment plants are in remote and difficult to access locations.
With these three issues facing many water engineers around the world, a low cost solution providing solutions to all three issues is available from Pi. A CRIUS® controller has the on board capacity to provide small scale SCADA, and full online PID control whilst the sensors (e.g. chlorine, pH, Turbidity etc.) are suitable for long term operation without operator intervention.
To demonstrate the remote access capability of the CRIUS® please click here.
To learn more about the control capability of the CRIUS® please click here.
To hear more about other customers using the CRIUS® multiparameter controllers in a similar way why not contact us?
pH Neutralisation of Plant Effluent
As increasing environmental regulations are being applied to industry all over the world there is a requirement for a single controller that can measure the online pH of multiple streams, can provide the control to automate pH neutralisation, can datalog the whole pH neutralisation process and can communicate back to the appropriate personnel if anything goes wrong.
That requirement can be met by the Pi CRIUS® pHSense. These two controllers can take in multiple pH sensors, provide up to eight fully functional PID control channels, datalog all inputs and outputs, and provide a machine to machine remote access capability which can email datalogs, alarms, can text alarms etc.
This fully integrated measurement control and communications controller comes at a small fraction of a cost of putting together a system with PLCs, instruments and modbus etc.
Taking advantage of this functionality a considerable sum of money was saved whilst more than fully complying with the requirement of the EPA in Ireland.
As described elsewhere, the pHSense can come equipped to automatically clean itself at user defined intervals with all the benefits of no operator intervention. The Autoflush is particularly useful in food preparation, pulp and paper, and many applications where there is likely to be a build up of solids in the sample.
pH Probe Maintenance
CRIUS® Remote Communications
CRONOS® and CRIUS® Control Options
Remote Access GPRS
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.
Focus On… Probe Fouling
Many different sites ranging across the whole water industry have a daily struggle to keep instrumentation functioning correctly due to fouling. However did you know that…
… self cleaning and self flushing systems are now available from Process Instruments for most types of sensors?
… these fouling removal systems can extend the life of sensors and drastically reduce maintenance regimes?
… Pi’s self cleaning/flushing systems are affordable, simple and trouble free by design?
What is the problem?
Whatever the process being monitored is, there is often something in the sample water capable of fouling a sensor, and therefore causing erroneous results. The obvious solution to this problem is to clean the sensor, but how regular should inspection and cleaning programs be for each piece of instrumentation? Too regular and the inspection and cleaning regime is time consuming and unnecessarily costly. Not often enough and the instrumentation will give false results and probably fail prematurely.
What is the solution?
Process Instruments’ Autoclean and Autoflush Systems
Simple, reliable and easy to maintain, Process Instruments’ Autoclean/Autoflush systems are an alternative to mechanical cleaning mechanisms which can clog and break. By regularly spraying the sensor/probe with clean water or air, the sensor remains clean and free from fouling for extended periods of time. The sensor cleaning cycle is activated by Pi’s controller for a user selectable length of time and frequency so that no matter how dirty the application, the probe remains clean. With no moving parts in the sensor body or in the cleaning attachment there is nothing to replace or check other than a simple valve positioned in an easy to reach location.
Pi’s Autoclean and Autoflush systems can give trouble free and fouling free functioning of sensors for weeks, if not months, at a time.
A solution for each application
This option can be added to our pH, ORP, Turbidity, Suspended Solids and Dissolved Oxygen (DO) sensors. Consisting of an end cap to direct the flow of clean water (or air for a DO sensor) across the face of the sensor blasting any dirt away. The cleaning is controlled by a single valve positioned in an easily accessible location.
If using air to clean a DO sensor the system can also automatically verify that the sensor is still responding correctly, removing any need to remove the sensor from the sample for months at a time.
For sensors that require flow cell mounting like Chlorine, Ozone and Chlorine Dioxide, an Autoflush system has inbuilt valves which automatically start/stop the sample flow and control the flow of clean water past the probe. The user can set the flushing interval and duration to keep the flow cell and sensor clear from fouling. For particularly dirty or stubborn contaminants, warm water can be used as the flush water to aid cleaning.
With the above options, whatever the application or parameter being measured, Process Instruments will be able to provide a monitoring system that will not only be accurate, precise and long lasting but that will also remain free from fouling and save the operator both time and money.