Top 4 Reasons to Use a Gel-filled pH Sensor in Low Conductivity Water

Need a reliable pH measurement in a boiler or RO water?  As long as the conductivity of your measured medium is above 10µS/cm, there is no reason to use a liquid-filled sensor. Gel-filled sensors provide a low-cost, low-maintenance alternative without compromising performance.

1. 1. Lower Purchase & Replacement Cost
      

      Gel-filled sensors can be anywhere from 20% to 50% lower in cost.
      Cost, of course, is dependent upon the manufacturer used. However, liquid-filled sensors are generally more complex in design, making them more costly to manufacture.

   2. Lower Operating Cost

      Gel-filled sensors do not require an electrolyte reservoir, tubing, or instrument air.

      • • Many liquid-filled sensors require an electrolyte delivery system that includes a reservoir to hold the electrolyte and tubing to connect the reservoir to the sensor.
        • If your process is operating under pressure, it is necessary to pressurize the electrolyte vessel to at least 1 bar/atm above process pressure. As a result, this requires a continuous source of clean instrument air.

   3. Reduced Maintenance

      Gel-filled sensors are easy to maintain.

      • • There is no need for a preventative maintenance schedule for re-filling and cleaning an electrolyte reservoir and tubing.
        • They do not need a clean supply of instrument air. Instead, gel-filled sensors are available with a pressurized reference system. In turn, this helps to offset the pressure of the process.

   4. Installation Flexibility

      Gel-filled sensors allow for mounting in a wide variety of fittings.

      • • The uniform design of a gel-filled sensor works in any fitting with PG 13.5 threads. However, the construction of a liquid-filled sensor can limit your mounting options.
        • Standard static holders, retractable holders, immersion holders, and flow-through fittings are compatible.

In conclusion, check out the M4 Knick SE 558 Gel-Filled pH Sensor for Low Conductivity Water and start reducing maintenance and cost of ownership without compromising performance.