OPTISOUND ultrasonic level transmitters

The OPTISOUND 3000 series consists of ultrasonic level transmitters for non-contact continuous measurement of liquids and bulk solids in storage tanks, process vessels, open channels, silos, stockpiles, and conveyor belts. The instruments differ in measuring range, transducer type, and process connections. Output: 2-wire or 4-wire 4…20 mA / HART.

Operating principle

The transducer emits short ultrasonic pulses (35–70 kHz) towards the product surface. The same transducer receives the echo. The transit time of the pulse is proportional to the distance to the surface, and thus to the level. An integrated temperature sensor automatically compensates for the influence of air temperature on sound velocity. Commissioning is performed by entering tank geometry only — no filling required.

Technical characteristics

OPTISOUND 3010 C

• Accuracy: typically ±0.25 % of measuring range

• Range: liquids 0.25…5 m / solids 0.25…2 m

• Process temperature: –40…+80 °C

• Pressure: –0.2…2 bar

• Wetted material: PVDF

• Process connection: G 1½ A or 1½ NPT

• Output: 2-wire / 4-wire 4…20 mA / HART

• Features: ideal for water and wastewater applications

OPTISOUND 3020 C

• Accuracy: typically ±0.25 % of measuring range

• Range: liquids 0.4…8 m / solids 0.4…3.5 m

• Process temperature: –40…+80 °C

• Pressure: –0.2…2 bar

• Wetted material: PVDF

• Process connection: G 2 A or 2 NPT

• Output: 2-wire / 4-wire 4…20 mA / HART

• Features: universal industrial applications

Main application areas

• Water and wastewater treatment

• Storage and process tanks

• Open channels and weirs

• Silos and hoppers for bulk solids

• Stockpiles and conveyor belt transfer points

• Virtually all industries

Advantages of OPTISOUND ultrasonic level transmitters

• Product properties (density, dielectric constant, conductivity) have no influence on measurement

• Truly non-contact — no wear and virtually zero maintenance

• Simple commissioning — only tank geometry input required

• Integrated temperature compensation

• Reliable operation even in dusty, steamy, or foamy conditions

• Cost-effective and proven technology for standard applications