Level measurement

114

Continuous level measurement in bulk solids

3. Selection of the measuring principle according to the application

Stockpiles

• Filling via conveyor belts/derrick type belts • Level measurement for conveyor belt control • The most varied grain sizes • May be exposed to environmental

Non-contact

B

Our proposal Radar Micropilot

Ultrasonics Prosonic

(separated)

(compact)

FMR66B

FMR20

FMR67B

FMR67B

FMU90/95

FDU93/95

FMU4x

Advantages

• Unaffected by the density of bulk solids, temperature, humidity, filling noise and weather impairment • Purge air connection is standard (FMR57) • Easy installation with alignment facility •Remote access via Bluetooth® • Heartbeat Technology 2-wire (HART®, PA, Ethernet-APL) ±3mm/±0.12" –40 to +450°C/–40 to +842°F –1 to +16bar/–14.5 to +232psi 1.6 DN 80, DN 100, DN 150, DN 200,

• Separate instrumentation • Connection of up to 10 sensors • Self-cleaning effect of sensors

• Robust sensor (vibration) • Relay output for point levels • Unaffected by the density of bulk solids, humidity and dielectric constant • Easy assembly/overall size (under conveyor belt derricks) • Good price/performance ratio 2-/4-wire (4-20mA HART®, DP) ±2mm/±0.08", ±0.2% of measured distance –40 to +150°C/–40 to +302°F +0.7 to +3bar/+10 to +44psi — Threads, flanges (DIN, ANSI, JIS), wall and assembly arm, assembly bracket 45m/148ft

Technical data • Connection •Accuracy • Process temperature* •Process pressure • Min. DC value •Process connection

•Maximum

125m/410ft

measuring range

Application limits

• • Risk of strong build-up formation •Poor access to the instrument

ultrasonics use of purge air ultrasonics ultrasonics, separated instrumentation

• Media with strong dust formation during filling • Angled surface/ funnel with a reflecting, smooth surface •Extreme filling noise

radar

ultrasonics with alignment facility, radar

radar

* At the process connection

Please note: Radar continued on Page 118

Please note: Ultrasonics continued on Page 126