The Light Edition (LE) sensors are tailor made for high price/performance ratio. The offering includes sensors for all common applications and focuses on low maintenance and easy handling. It is the perfect match with the Five and Education Line meters. These electrodes with gel or liquid type electrolyte or solid polymer (Xerolyt) reference system, all with open junction. The LE409 model is refillable with Glass shaft, used for accurate and fast measurements for a wide range of sample types and dirty solutions.