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inline gas LNG density meter - DVP


Ultra high accuracy simultaneous density and viscosity metering for gas, fluids

in-line, online, real-time viscosity & density metering

  • Single instrument for simultaneous process density, viscosity and temperature
  • Monitor even gas density and viscosity
  • Accurate measurement in the harshest of conditions
  • Operational to 15,000 psi (1000 bar) & 400 °F (200°C)
  • Full Titanium Grade 5 construction

3-in-1 process instrument

Density meter, Viscometer and Temperature gauge all-in-one. Small form-factor robust device.

Repeatable, Reproducible

Newtonian, non-Newtonian, Single and Multi-phase fluids

All 316L stainless steel wetted parts

Hermetically sealed, metal-metal process sealing – no elastomer needed.

Built-in fluid temperature measurement

Excellent cross-correlation between temperature and viscosity.

Fluid measurements
Density Range0 – 1.5 g/cc
Density Accuracy0.001 g/cc
higher accuracy available
Viscosity Accuracy0.1 cP below 1 cP
5% of reading (standard)
higher accuracy available
Viscosity Range0.2 - 300 cP
ReproducibilityBetter than 1% of reading
TemperaturePt1000 (cIass AA)
Operational conditions
Process Fluid Temperature-40 up to 200 °C
Ambient Temperature-40 up to 150 °C
Pressure Rangeup to 15,000 psi
  • The rheonics high accuracy density meter and viscometer DVP measures viscosity and density by means of a torsional resonator, which is fully immersed in the fluid under test.
  • The more viscous the fluid, the higher the mechanical damping of the resonator. By measuring the damping, the product of viscosity and density may be calculated by rheonics’ proprietary algorithms.
  • The denser the fluid, the lower the resonant frequency. A denser fluid increases the mass loading of the resonator.
  • The resonator is both excited and sensed by means of an electromagnetic transducer mounted in the sensor’s body.
  • Damping is measured by the rheonics patented sensing and evaluation electronics and stable, high accuracy and repeatable readings are obtained based on rheonics’ proven gated phase-locked loop technology.
Operating principle
Robust and Compact Gas, LNG, HPHT Density meter + Viscometer

Small Form Factor

Fits in your palm but the most robust inline process density meter and viscometer. Period.

Easy installation

Install in existing ports with threaded, flanged, and other process fittings. Available with standard threaded process fittings.

Easy integration

User friendly electrical connections without any screws. Programming needs at minimum with industry standard protocols.

Highly immune

Combination of patented mechanical and electrical design with advanced noise cancellation electronics gives high accuracy in high EMI, vibrations.

Wide Operational Capabilities

Density Range

0 – 1.5 g/cc
1 – 1500 kg/m3
0 – 12.52 lb/gal

Density Accuracy

0.001 g/cc
1 kg/m3
0.008 lb/gal
Higher accuracy up to 0.00001 g/cc available

Viscosity Range

0.2 to 300 cP

Wide range viscosity for all DVP target applications.

Viscosity Range and Accuracy

0.1 cP below 1 cP
5% of reading (standard)
higher accuracy available


up to 10,000 psi (690 bar)

High pressure density and viscosity monitoring of process gases and fluids


-40°C to 200°C (392°F)

Operational to high temperature

Custom version for LNG operation (-180°C)

Fluid Types

Single phase

Not suitable for fluids with magnetic particles

Process Analysis and Acquisition Softwares
Insensitive to Mounting Conditions

Balanced Resonator

Unique patented co-axial resonator. High immunity of external vibrations and shocks.

Direct Mounting in tanks/pipes

Two ends of the sensors twist in opposite directions, cancelling out reaction torques on their mounting

Extended Adapter

Insert sensor to the middle of flow in large tubes or in deep tanks. No limit to insulation depths.

Process Density and Viscosity Monitoring, Storage & Analyzer

Powerful, intuitive GUI with measurement acquisition, analysis & logging.

On-device(edge), cloud and PC data acquisition and analysis

API for data acquisition and integration in customer applications

Ruggedised electronics deliver accurate, fast and reliable measurements

Sophisticated, patented 3rd generation electronics drive these sensors and evaluate their response. Ultra-fast and robust electronics, combined with comprehensive computational models, make DVPs one of the fastest and most accurate in the industry. DVP gives real time, accurate density and viscosity measurements every second and is not affected by flow variations!

Process Control

  • PLC Integration
  • IP integration
  • Standalone

Cloud based process control

  • OPC UA
  • JSON
  • TCP/IP

Edge process control

  • Analog Communication
  • Digital Communication
  • Integrated Webserver
Multiple communication options available

4-20 mA

RS 485

Modbus TCP






SD Card

HART Ready

Wireless Ready


Customise the sensor to meet your needs

Choose from a wide range of electronics, communication, temperature, accessories and process connection options. Define requirements as per your process needs and place an order.

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CAD Model – DVP

CAD model (Step File) of DVP


CAD Model - DVP
Declaration of Conformity – CE Declaration of Conformity as per EN 61326-1:2013, EN 61326-2-3:2013 & EN 50581:2012

Declaration of Conformity for SME-TRD, SME-TR & SME-DRM as per directives – Electromagnetic compatibility (EMC) Directive 2014/30/EU & Restriction of Hazardous Substances in Electrical and Electronic Equipment (RoHS2) Directive 2011/65/EU


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Declaration of Conformity - CE Declaration of Conformity as per EN 61326-1:2013, EN 61326-2-3:2013 & EN 50581:2012
Article – Laboratory for Mechanics and Experimental Dynamics, ETH Zurich

ETH Zurich, Laboratory for Mechanics and Experimental Dynamics – Article on Dynamic viscosity and density sensing featuring Rheonics (previously Viscoteers)


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Article - Laboratory for Mechanics and Experimental Dynamics, ETH Zurich
Manual – DVP

DVP Installation and Operating Instructions

Request File

Manual - DVP
Product Portfolio – SRV, SRD, DVM, DVP

Overview of the Standard Products – Information on Specifications, Electronics, Communication, Mechanical, Dimensions, Software and installation.


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Product Portfolio - SRV, SRD, DVM, DVP
datasheetstechnical-information marketing
Datasheet – DVP

Information on Specifications, Electronics, Communication, Mechanical, Dimensions, Software and installation.


Datasheet - DVP
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