The standard model in this range is the SE 102. These pH electrodes are inexpensive combination devices that are housed in a glass body and feature a Pt 1000 temperature probe and refillable electrolyte.
For rougher environments and more rugged applications, SE 101 electrodes are housed in a plastic body, and equipped with an integrated Pt 1000 temperature probe and gel electrolyte.
Finally, SE 104 models are puncture electrodes that are gel-filled. With a particularly robust construction, and offering strong resistance to pollution, these electrodes are especially suitable for taking measurements in semisolid substances such as meat or cheese.