Level measurement

Overview measuring principles

11

A

Servo

Capacitance

Radiometrics

Hydrostatics (pressure + differential pressure)

–200 to +200°C/ –329 to +392°F 0 to +25bar/ 0 to +362.5psi up to 47m/154ft

–80 to +200°C/ –112 to +392°F –1 to +100bar/ –14.5 to +1,450psi 0.1 to 10m/0.3 to 32ft

Unaffected by temperature and pressure

–70 to +400°C/ –94 to +752°F/ Ambient pressure 420bar/6,090psi (dp)

0.05 to 20m/0.16 to 66ft

• Upt to 0,01 m

(10mbar/0,145 to 700bar/10.150)

• ±4mm/0.02"

•±1% of measuring distance

• ±1% of measuring distance

• Up to ±0.025% of the set span

•Extreme turbulent

• Plastic tank •Extreme conductive build-up

• External radiation (gammagraphy), solution with Gamma Modulator

• Turbulent surfaces

surface (use stilling well) •High viscose medium

•Viscose medium •Build-up

•

• Extreme pressure fluctuations • Extreme build-up

• Density change • Very fast temperature change • agitator (dp)

changing dielectric constants •Conductive build-up

• Viscosity

•Agitator blade • Changing, non

• Non-contact measurement

• Curing build-up •Strong density fluctuations

> 5000mPa s

from outside and, therefore, no application limits • Observe radiation

•Lateral

conductive media or conductivity between

installation or from below

• • Media diffusing through

protection regulations

3 Measurement is possible up to the blocking distance (BD) of the sensor