Siemens LC 500, Sitrans Pressure and Temperature Considerations, Probe Configuration

Probe Configuration

Pressure and Temperature Considerations

The maximum temperature and pressure of operation for the standard SITRANS LC 500 level probe is 200°C (392°F) and 200 bar (2900 psi). Please consult the pressure curve on page 18 for qualifications that must be applied to these maximums.

Enamel probes are recommended when the process temperature exceeds 200 °C, and/or in combination with very high pressure.

Note: Consult your Siemens Milltronics representative if the material to be measured may be incompatible with the SITRANS LC 500 materials of construction.

Temperature Versus Pressure Curve for SITRANS LC 500 PFA-insulated Level Probe

As the temperature approaches 75°C (167°F), the maximum pressure must be derated1. When the temperature reaches 200°C (392°F), the maximum pressure is limited to 50 bar (725 psi). This curve is typical for water only. For other, more aggressive chemicals the derating curve will be more severe.

				pressure					consult factory when pressure or
									temperatures fall within this area
		200 bar (2920 psi)
		150 bar (2190 psi)
		100 bar (1460 psi)
		70 bar (1022 psi)
		50 bar (725 psi)
			–1bar (–			70oC
						(158 oF)
			14.6 psi)							temperature
–100	oC	–50 oC		0 oC	50 oC		100 oC	150 oC	200oC
(–148 oF)		(–58 oF)		(32 oF)	(122 oF)		(212 oF)	(302 oF)	(392 oF)

Reference Product: Water

Notes:

•For high temperature and pressure ratings for the Enamel probe, please contact your Siemens Milltronics representative.

•For FM / CSA Explosion Proof applications: if the process temperature exceeds 135 oC (275 oF), select process seal type SD,DD,HP or HT.

1.Decreased within the limits specified in the diagram (maximum 200 bar).

Page 18 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01