A variety of insulated electrical leads can be installed in any Parr reactor or pressure vessel for electrical connections required inside the vessel. Four commonly used examples are discussed below.
Transducer glands are available to allow up to 16 individual wires to be sealed and insulated through a single gland. These types of glands are typically used with low voltages and current.
Applications requiring a single electrical conductor having high current or very high voltage capacities can be handled with an electrode gland. These glands provide a seal for a single conductor or electrode with the ends of the conductor threaded so that internal and external lead wires can easily be attached.
Power leads can be provided with either single or multiple flexible wires. in sizes from 14 to 18 gage. Current ratings range from 5 to 20 amperes at up to 600 volts. PTFE or ceramic insulating glands are commonly available. Ceramic glands can be used to the full temperature rating of most Parr vessels. Pressure ratings will vary depending upon the design of the gland, its size and the type of insulation used.
Parr has installed a number of different sensors in its various reactors and pressure vessels, including single point and continuous liquid level sensors, pH electrodes, and dissolved oxygen electrodes. Each of these installations must be carefully developed in consultation with the user, the electrode or probe supplier and the Parr’s Engineering Department. Glass electrodes with O-ring seals will obviously carry rather strict temperature and pressure restrictions. There are also space restrictions which generally dictate that accessories of this type can only be installed in 1000 mL or larger vessels.