Process Vessel Reference Electrode
The Model FE Process Vessel Reference Electrode is designed to operate in environments where ordinary reference electrodes cannot survive. These include elevated temperatures, high pressures and/or contaminated electrolytes. This is a two-piece unit consisting of a bridge which is permanently installed at each location where potential readings are desired and a separate reference electrode. Because the reference electrode is a separate piece, it is isolated it from the aggressive environment which substantially increases its service life. The reference electrode can also be removed for calibration or service without affecting the integrity of the vessel.
The Model FE10 bridge has a 316L stainless steel nipple which threads into a 1 in. NPT hole. Variations of this design have been developed which thread into a 3/4 inch NPT (Model FE7) or a 1/2 inch NPT (Model FE5) tapped hole; all three variations have a 1 inch NPT thread on the termination end. Other nipple alloys are available on special order. Bridges can be ordered with a protrusion ranging from 1 inch (2.5 cm) up to 19 inches (48 cm). All bridges without coupons are pressure rated for 150 psi (1,000 kPa) and tested to 300 psi.(2,000kPa). A high pressure version designated as FEH is rated for 300 psi (2,000 kPa) and tested to 600 psi (4,000 kPa). Bridges with coupons are rated to 25 psi. (173 kPa). Temperature rating on all designs is 210°F (98°C)
For intermittent readings, the reference electrode is simply pressed into the bridge. In this case, a single reference can be used with several bridges. When continuous readings are required, the reference electrode is threaded into the bridge. Reference elements available with this product are gelled copper/copper sulfate or gelled silver/silver chloride.
Our single piece Through Wall Reference Electrodes may be suitable in less demanding environments.