Why We Use 1/2″ Tubing and Tips For Sensor Stability and Maximum Lifespan

The majority of chemical automation systems that are out there come with 3/8″ tubing for their flow cells. The reason we use 1/2″ tubing is because we recommend installing the flow cell by pass supply after the filter and then returning after the heater to keep as much debris out of the strainer and sensors as possible. This also helps to assure flow through the cell as the filter gets dirty.

Drawing water after the filter with pump suction will reduce the life of the sensors by drawing more reference gel from the sensor due to suction. It is also recommended to slow the flow across the sensors as much as possible by throttling the flow with the discharge valve. This will also reduce air bubbles going through the sample cell which can cause unstable readings.

If you need to clean your ORP and pH sensors, use a soft toothbrush with warm, soapy water and gently clean, rinse and replace. Do not use acid. If after doing the above procedure you notice any scale on the sensor bulb, soak in vinegar or a weak water/acid solution for 10-15 minutes.

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