S270 Series pH sensors from Sensorex provide accurate pH measurement in plant water/wastewater treatment, chemical, food production and other process environments. Economical and easy to clean, the pH sensors are compatible with virtually all commercially available transmitters and controllers, including the Sensorex TX100, 2000 or 3000 pH/ORP Transmitter family. They are available in a range of configurations to meet the needs of both industrial and municipal end users. Either spherical (S271CD) or flat (S272CD) pH measurement surfaces are available, providing accurate measurement over a range of 0 to 14 pH. They are constructed with chemical-resistant Ryton sensor bodies and use a polymer sensor reference gel. With integral 3/4-inch NPT threads, the sensors can be installed inline in any standard 3/4-inch flow-through pipe tee, or submerged directly in a process tank. 714/895-4344; www.sensorex.com.