PLANT MANAGEMENT
Manual calibration of pH sensors will require an employee to ‘invade’ the clean room
requiring an employee to ‘invade’ the cleanroom, remove the sensor, clean it, place it in a series of different buffer solutions, and wait until the pH value is stable. This poses the risk of mechanical damage to the sensor, and the employee’s actions may also influence the process. For example, whether the sensor is swirled or simply immersed in the buffer solution makes a big difference. Finally, the sensor must be reinstalled, and the system must be cleaned or sanitised. A risk assessment at the customer’s facility identified more than 80 potential sources of error during calibration and measured value transmission.
RETRACTABLE FITTING FOR HYGIENE The SensoGate retractable fitting is ideal for hygcleanienic applications. Its patented lock-gate system reliably seals the process at all times, allowing the sensor to be replaced without process interruption. A sophisticated cyclone rinsing thoroughly cleans the sensor, the seals, and the calibration chamber. Unlike other manufacturers’ retractable fittings, the SensoGate has no dead spaces that cannot be cleaned by rinsing, SIP and CIP.
FOCUS ON PRODUCT DEVELOPMENT Knick attaches great importance to good design for new products and achieves a high level of flexibility by applying the modular principle. That Knick’s fittings have been supplied for a range of process connections enables high adaptability to almost all applications. ●
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Knick: SensoGate WA130H with Ingold process connection
Automatic pH sensor calibration
Knick offers a solution for automatic pH sensor maintenance that eliminates the disadvantages of manual calibration. During the three-minute pitch, this feature also aroused the curiosity of the pharmaceutical company’s CEO. The system of automatic pH measuring loops, which Knick markets under the name “cCare”, performs a standardised calibration that is fully automatically and sends all values and the calibration report to the process control system. As a result, all batch data is digitally documented by an audit trail without the risk of manual transmission errors. The automatic system always performs sensor adjustments in exactly the same sequence. cCare does more than just extend sensor service life and reduce labor costs. Its fully automated sequences also ensure more accurate pH measurements, which directly impact the safety and yield of the biopharmaceutical process. The cCare system is also the only sensor maintenance system on the market that is fully approved for use inin Zone 1 hazardous locations.
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