Siemens Sitrans, LC 500 instruction manual Electrode Assembly, Process Connections, Seal Types

Electrode Assembly

SITRANS LC 500 electrodes come in a variety of formats to provide the necessary characteristics for correct mounting, chemical compatibility, temperature and pressure requirements, and dielectric constant of the medium. The main body of the manual discusses the standard configuration. Other options, with details, are shown in Appendix E: SITRANS LC 500, alternate versions and application details, page 83.

Process Connections

The standard threaded process connection (S-Series) with PFA insulated electrode, including the active shield, provides good results in all measurement situations within the temperature, pressure, and corrosive capabilities of the materials and seals. This remains true over a wide range of dielectric constants in both non-conducting and conducting materials.

Any standard process connection is available with the SITRANS LC 500, and special versions can be fabricated to match the mounting and application requirements. A wide range of threaded and flanged fittings is available. (Contact your local Siemens Milltronics representative for details, or check our website at: www.siemens-milltronics.com.)

Seal Types

The basic internal seal for the SITRANS LC 500 has a conical-shaped, preloaded pressure/leak resistant construction. Up to three levels of seal protection are implemented depending on the integrity requirements of the application. A single or double cone internal seal forms one or two barriers against leaking, and a third flange face gasket is also available in the D and DD seal construction. The flange face seal also provides a design with no metal wetted parts if required.

Process Connection and Seal Configuration of SITRANS LC 500

Process Connection	Seal Type	Seal Description
Threaded	S	Single Cone
Welded Flange	S	Single Cone
	S	Single Cone
	D	Single Cone + Teflon flange seal
Solid Machined Flange
	DD	Double Cone + Teflon flange seal. (Consult your
		local Siemens Milltronics representative.)
	SD	Double Cone (used for stilling well applications)

Probe Configuration

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 17