Level measurement

Selection according to application

33

Interface measurement

Interface liquid/liquid With emulsion layer Multiphase measurement Recommendation

Non-contact

B

Capacitance Liquicap

Radiometrics Gammapilot

FMI51/52

FMG50

• Tried and tested instrumentation • No wet calibration required • Not affected by the density of the medium • Unproblematic use in emulsion layers • Ideal for very small measuring ranges • Extremely fast response time

• Non-invasive and maintenance-free measuring method • Unaffected by pressure and temperature • Only slight influence by build-up • Unproblematic use in emulsion layers • Solutions for multiphase measurements using several detectors

2-wire (HART®) ±1%

2-wire (HART®) ±1% of measuring distance Independent (non-invasive) Independent (non-invasive) Independent (non-invasive)

–80 to +200°C/–112 to +392°F –1 to +100bar/–14.5 to +1,450psi Threads, flanges (DIN, ANSI, JIS), hygiene connections 4m/13ft (rod), 10m/32ft (rope) • Difference of the dielectric constant (DC value) between the two media must be >10. The upper medium may not be conductive • Accuracy impairment in case of nonconductive build-up on the probe • The smaller the vessel the higher the influence of DC changes in the upper medium • The bigger the quotient DC(below) /

Adaptable to application

• Medium density changes influence the accuracy • The overall level is not measured (possible with a further source and detector) • Calibration with the medium is required • Observe radiation protection regulations

DC(above) the better the accuracy • The total level is not measured

Please note: Capacitance continued on Page 80