Do you want stable chemical control and an odor free bathing environment for the users of your pools and spas? If so the AquaSense from Pi addresses and resolves the issues that plague swimming pools and spas, such as; overdosing of chlorine leading to odors and excessive chemical usage, poor pH control leading to sore eyes and complaints, and periods of low or zero chlorine residuals leading to bacteriological failures and problems with the local health authorities.
AquaSense uses the highest quality sensors and the latest in control algorithms to ensure that the chlorine levels stay where you want them to be, no silly spikes and troughs which means that you have a trouble-free pool or spa.
The AquaSense has been designed to three criteria:
Pools – The sensors used in AquaSense are the same sensors that we use in our municipal water treatment analyzers, meaning that you get the highest quality sensors at the best price.
These sensors mean that the pH and chlorine are measured accurately all of the time with little or no operator intervention for months at a time and with no routine maintenance for a year.
Pools are controlled precisely meaning that operators can lower their residuals to a minimum without fear that the residuals will dip when the bather load increases.
Easy to set up and operate, the AquaSense can control the most difficult of pools meaning that your pool is always in compliance with local regulations and always provides your bathers with the most pleasant bathing experience.
Spas – Spas present their own problems when it comes to control. Small, warm bodies of water where the chlorine demand can go high very quickly are notoriously difficult to control. With its advanced control algorithms, AquaSense has proven to be more than up to the job. Contact us today for technical help and advice on controlling your pool or spa.Traditionally, pool chemistry has been controlled by using ORP (Redox) or residual chlorine sensors. Often the quality of these sensors has been suspect and it doesn’t matter how good the control electronics are, if the sensors aren’t good then the quality of the pool water won’t be good.
The sensors that the AquaSense utilizes are the best currently available in the world today. The main free chlorine sensor is a three electrode, membraned sensor with lower susceptibility to changes in pH. That means that when the pH changes the chlorine reading doesn’t so the two control loops controlling your chlorine and your acid don’t end up chasing each other. Not only that but maintenance on the sensor is only once per year and it can go months between calibrations. Sensors for chlorine in the presence of cyanuric acid and for saltwater pools and for total chlorine are also available.
The pH and ORP sensors are made specifically for the AquaSense. They are stable, accurate, easy to use and reliable. These AquaSense pH and ORP sensors are not the low-quality sensors that are often supplied to the pool industry but are based on the sensors used in municipal water works where quality is way more important than price. Not that the AquaSense sensors are expensive, but they are high quality.
The science and technology behind the success of the AquaSense is the de-coupling of the pH and the chlorine measurement. What that means is that the chlorine and the pH can be controlled independently from each other, or put another way changing the pH doesn’t affect the chlorine reading on the chlorine sensor. Unlike ORP measurements which are badly affected by changes in pH, the amperometric chlorine sensor in the AquaSense is unaffected by changes in pH leading to a more chemically stable bathing water. In turn this means that the levels of the chemicals in th pool water can be lower and therefore leading to a much more pleasant bathing experience for the customers.
The smell often comes from chloramine, which occurs when the chlorine in your pool combines with substances such as oils, sweat and skin cells from bathers in your pool. It can also occur if you are overdosing your chlorine.
By utilizing a good controller such as the Pi AquaSense, and the correct dosing equipment. Feel free to contact us to discuss your pool and find the best solution.
Adding chlorine to the pool or spa will oxidize substances in the water, such as oils, sweat and skin cells, killing any organisms. The chlorine left after everything is oxidized is the residual chlorine.
Combined chlorine is the collective name for three chloramines; monochloramine, nitrogen trichloride and dichloramine.
Monochloramine is formed in water containing ammonia and hypochlorite.
Nitrogen trichloride is formed in acidic solutions when monochloramine disproportionates.
Dichloramine is the chloramine smell that is usually mistaken for a chlorine smell. This often occurs where there is a low concentration of chlorine.
Total chlorine is free chlorine and combined chlorine together.
Yes. However the effect is minimal and most users accept this as standard.
Using a handheld colorimetric DPD meter.
In the modern and busy world of the commercial pool, operators don’t have time to check up on equipment and write down or download data from pool controllers. That’s why AquaSense comes with some remarkable abilities. Not only can it datalog any signals you decide to put into it but it can;
Many leisure facilities are now fitted with sophisticated BMS (Building Management Systems), and Pi’s pool and spa controllers can communicate directly to the BMS, whatever system it may be by using a range of communication protocols including LAN, Profibus, Modbus, and MQTT as well as more traditional analogue and digital outputs.
By turning down the pool recirculating pumps overnight AND when the pool is less busy, it is possible to save a lot of money on electricity, especially during the day when electricity is more expensive. The CRIUS®4.0 has algorithms that allow you to control an invertor which in turn controls the speed of your pumps.
This works because most pumps are over specified for the duty (they are too big) and so we can turn them down to the minimum flow specified by the installer of your pool. As long as you don’t go below that flow you can save money and pay for your new controller in a matter of months. Not only that but by using less electricity you are reducing CO2 emissions and helping to save the planet.
Focus Ons are a series of short articles, 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.
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