The Reverse Osmosis (RO) approach, often found in renal wards, can be adversely affected by chlorine’s damaging impact on RO membranes. However, it’s less well-known that…

Process Instruments UK Ltd. has a protective system capable of alerting you to the presence of any free chlorine and can even halt the flow of contaminated water before it reaches the membranes?

Ordinary mains water, a typical source for corporate buildings, hospitals, and industrial processes, usually includes chlorine. This chemical, added by municipal water companies, is used for its disinfection properties. In any system requiring RO membranes, if the water source is mains water, carbon filters are typically placed before the membranes. The carbon filters aim to remove any chemicals that could harm the RO membranes, including chlorine.

Our HaloSense Zero chlorine controller examines the water exiting the carbon filters before it reaches the RO membranes. Any free chlorine that has made it past the carbon filters is detected by the system, which can activate an alarm and can be adjusted to automatically close valves to stop the contaminated water from reaching the RO membranes.

Hence, the HaloSense Zero serves as a protective measure ensuring that in the event of a chlorine breakthrough, the system can be shut down to avert damage to the RO membranes. This can contribute towards extending the lifespan of the costly RO membranes and save the customer money.

In hospital systems supplying water to renal wards, the removal of chlorine takes on an even greater significance. Here, the HaloSense Zero chlorine analyzer not only protects the RO membranes, but can also contribute to preserving lives. If any chlorine were to get past the carbon filters and damage the RO membranes, it could pose a risk to renal patients in the hospital. The HaloSense Zero chlorine system offers an additional level of defence against this potential hazard.

The HaloSense Zero comprises a sensor developed to monitor the absence of chlorine connected to a CRONOS® or CRIUS® controller. The sensor can pick up on even extremely low levels of free chlorine, while the CRONOS® or CRIUS® controller acts as the system’s intelligence, interpreting data from the sensor. Should any free chlorine be detected, the analyzer will sound an alarm and can automatically close valves to stop chlorine from reaching the RO membranes.

So why haven’t you adopted this system yet? Are there any downsides?

The only downside is that the HaloSense Zero can’t detect combined chlorines in the water. Typical mains water in most countries contains a mix of free chlorine and combined chlorine, which is what the HaloSense Zero is designed to detect and guard the RO membranes against.

The clever HaloSense Zero chlorine analyzer even runs periodic checks on the sensor’s responsiveness automatically, ensuring that the sensor is still functioning correctly when free chlorine is present. It achieves this by alternating between the post-carbon filtered water and chlorinated mains water through the use of a 3-way solenoid valve controlled by a programmed timer.

If you’re using a carbon filter before your RO membranes to remove the chlorine, the likeliest reason you haven’t adopted this system yet is simply that you haven’t been made aware of it. The Pi HaloSense Zero chlorine system is just one of Pi’s practical solutions for water treatment issues.

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