Anton Paar Process Densitometers and Viscometers

Eastern Energy Services Pte Ltd is responsible for the distribution and service of The L-Dens is a densitometer in its geographical region. The L-Dens densitometer is a product designed and manufactured by Anton Paar GmBH's Process Measurement Division. Anton Paar is the world leader in density measurement with over 1700 employees and 20 sales locations. EES is a well known instrumentation supplier in Singapore with over 30 years of experience in the oil and gas, petrochemical, pipeline, metering, chemical and, tank farms with instrumentation that improves sampling and bunkering, product monitoring & control.

The L-Dens is a high end measuring device designed primarily for online process density measurements in ATEX Zone 1 and FM Class I Div I hazardous areas and applicable standards in the oil industry e.g. API MPMS Chapter 9.4

L-Dens 427 Online Density Sensors
L-Dens 427 Online Density Sensors


  • Accuracy of 1 x 10-4 g/cm³
  • Compact Design
  • Lightweight
  • HART Communication
  • Modbus
  • Designed for Fiscal Measurements
  • Flow Computer interface capability
  • Online API measurements
  • 4-20 mA
  • HART communication
  • Modbus communication

The L-Dens is a highly accurate densitometer which can be installed in applications which require fast response /online density measurements.

L-Dens 427 Online Density Sensors


  • Online density measurement
  • Online API measurement
  • Online concentration measurement
  • Mass flow rate determination in combination with a volumetric flow meter
  • Product differentiation and/or phase separation
  • Product blending
  • Quality control
  • Fiscal measurements

Anton Paar Online Viscometers

L-Vis 510 Smart Sensor
L-Vis 510 Smart Sensor
L-Vis 510 Smart Sensor
L-Vis 510 Smart Sensor

L-Vis 510 is an inline viscometer which is immersed directly in the production liquid. It continuously displays the viscosity and temperature of lubricants, starch adhesives, suspensions,and many more process liquids, allowing 24-hour production monitoring.


  • L-Vis 510 is available in three versions:
  • L-Vis 510 Smart Sensor combined with an mPDS 5 evaluation unit
  • L-Vis 510 Smart Sensor with Operating Terminal (OT) - the measurement values are displayed directly on the instrument, no evaluation unit is required
  • L-Vis 510 Smart Sensor with a Remote Operating Terminal (ROT) which can be mounted at a distance of up to 250 meters from the sensor
  • Stable results, even under adverse conditions
  • Drops in pressure or flow rate do not affect the results
  • Ensures consistent product quality and reduces reject product
  • Uses a new measuring principle, only available from Anton Paar
  • Viscosity range covered from 1 to 50,000 mPa.s
  • Longstanding experience in rheometry and viscometry
  • For more insight into material properties, L-Vis 510 can be used in combination with an MCR rheometer, SVM 3000 viscometer or AMVn viscometer
  • Installation directly in the pipe or stirring tank
  • No bypass required, immersed directly in the liquid in the production line
  • Easy to retrofit the inline viscometer into existing plants
  • Various communication possibilities with mPDS 5, Operating Terminal (OT) and Remote Operating Terminal ROT)
  • Digital/analog in/output
  • EtherNet/IP
  • Modbus TCP
Measuring range 1 mPa.s to 50.000 mPa.s
Typical accuracy 1 %
Typical repeatability 0.5 %
Sample temperature range -5 °C to +200 °C
Ambient temperature -20 °C to +40 °C
Sample pressure range 0 to 25 bar
Material Stainless Steel No. 1.4462, anodized aluminum
Dimensions (LxWxH) 420 mm x 200 mm x 180 mm
Weight approx. 12 kg
Flange type

AP flange set incl. quick coupling DIN flange > 80 mm; ANSI flange > 3 in

VARIVENT flange > 80 mm or 3 in

Wetted parts Stainless Steel No. 1.4462, diamond-coated SiC seal, Viton O-ring seal
Installation dimensions min. 130 mm x min. 100 mm (L x Ø)
Operating terminal
Display 420 mm x 200 mm x 180 mm
Analog output  2 x 4 to 20 mA
Digital output 1 x
Digital input 1 x
Fieldbuses PROFIBUS DP, PROFINET IO, EtherNet/IP, Modbus TCP
Technical Details
Power supply 24V DC 3.75 A
Degree of protection IP 65