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乳品厂的 pH 值测量需要用于质量和过程控制器。标准的玻璃电极有破损的风险，影响产品安全。使用非玻璃 pH 传感器可以消除这种危险，同时保持较高的测量精度。
本案例研究讨论了美国 Glanbia Foods Inc. 如何选择梅特勒托利多InPro 3300 ISFET 非玻璃 pH 传感器。他们在没有任何传感器故障或破损的情况下获得了准确、实时的结果。
Glanbia Foods, Inc. 是总部位于爱尔兰基尔肯尼的国际食品公司 Glanbia plc 的一个部门。格兰比亚食品公司是美国最大的奶酪和乳清产品生产商之一。该公司在爱达荷州南部经营着两家奶酪工厂，其中一家生产桶装（美式）奶酪，另外还有两家独立的乳清工厂。这些工厂每天共使用 1030 万磅牛奶，每年生产 3.9 亿磅奶酪和 1.08 亿磅乳制品配料。
Glanbia Foods process engineers decided upon METTLER TOLEDO’s InPro 3300 ISFET (Ion Selective Field Effect Transistor) non-glass pH sensor. The InPro 3300 ISFET body is constructed out of rugged PEEK FDA-compliant material and has been engineered for hygienic operation. It has been tested and certified to 3A and European Hygienic Engineering & Design Group (EHEDG) standards and is capable of operations up to 130 °C / 266 °F for steam sterilization. The InPro 3300 ISFET’s performance matches its design by providing accurate and real-time results after repeated use and sterilization cycles. An additional benefit is provided by the integral PT 1000 temperature compensating sensor providing back-up readings to the batch RTDs.
.png/_jcr_content/renditions/cq5dam.web.1280.1280.png "在线pH探头/ORP（氧化还原）探头")