Viscosimètre STV 4 Postes EN 12846

Pseudo-Viscosity of emulsions | STV

The determination of the pseudo-viscosity of bitumen emulsions, which is described in the test standard EN 12846-1, is a basic test specified in standard EN 13808, in the same way as the breaking index, the water content and the sieve residue . The viscosity of the emulsions depends on the binder content of the emulsion, of the particle size as ell as the viscosity of the individual phases. More generally, the mecanical and chemical means used for production determine the physico-chemical properties of the resulting emulsions. Yhe viscosity is a key parameter that needs to be tailored to the application, the treated surface as well as the climatic conditions.

The pseudo-viscosity is determined using a flow viscometer, better known as the “Standard Tar Viscometer (STV). This device measures the time, in seconds, taken by a sample of 50 mL of emulsion to flow through a 2, 4 or 10 mm ∅ hole, at a specified temperature (40°C in general). The property that is being measured is the pseudo-viscosity because the flow time is an indirect measure of viscosity.

For all temperatures and hole diameters, the flow time must not exceed 600 s. For highly viscous emulsions, standard EN 13302 must be used.

EN 12846 – 1/2

Category:

Viscometer 4 Slots | EN 12846-1/2

Viscosimètre STV EN 12846

Efficiency

For laboratories with a high demand, VIALAB has developed this Viscometer STV, whose 4 slots enable to accelerate quality control.

Control

The regulation device chosen by VIALAB can quickly reach the target temperature as well as guarantee stability and homogeneity in the bath. Moreover, an external probe allows to check the temperature in each slot in order to control the testing conditions of the samples.

Confort

This device has been developed to combine reliability, robustness and a light weight. To maximize user confort, the target temperature and the measures are visible on the display screen at any time. Finally, each slot is identified so that the measuring cylinders can be positionned easily.

Specifications

Performances :

  • 4 test stations for the reception of brass viscosity containers
  • Thermoregulator with OLED display
  • Temperature controller integrated in the immersion heater
  • Simultaneous display of setpoint and actual temperature
  • Integrated Pt100 probe
  • Temperature range: ambient +5°C to 80°C
  • Temperature stability: ± 0.05°C
  • Integrated double-effect pump
  • External probe for measuring and displaying the temperature in viscosity vessels via the regulating head directly.
  • Hydraulic flow orientation to ensure temperature uniformity
  • Laser marking of the location of the 4 specimens on the base
  • Nickel-plated brass ball drain valve in the lower part
  • Robust, light and reliable assembly

Technical specifications:

  • Heating power 1800 W
  • 316L stainless steel bath and sump
  • 30 mm thick rock wool insulation
  • Structure in aluminum profile
  • Bath volume: approx. 20 L
  • Integrated double-effect pump discharge | suction: 14 | 10.5L/min
  • POM C top cover
  • Filling hole in the upper part with built-in thermometer pass-through plug
  • 4 rubber pads with non-slip base
  • Safety class III | IP20
  • Overheat protection
  • Control of the presence of water by electromechanical plunger to activate the heater
  • Coil with inlet/outlet for connection to the mains water supply or to an external device
  • 4 shutter doors with clamp and clamping nut, removable and adjustable
  • Watertight bath/cover junction by 1 mm neoprene rubber sheet
  • 230 VAC power supply | 50Hz

Device alone

Included:

  • STV Viscometer 4 Slots with immersion heater
  • Electronic external probe
  • Customized transport and storage box
  • Trilingual instruction manual FR | EN | ES
  • EC certificate
* To be odered seperately:
  • Colored liquid IP8C thermometer
  • Containers and shutters
  • Cover for containers
  • Standard graduated cylinders 100 mL

F044.137.2020

Essential Kit

Everything needed to perform STV tests with Ø 2 and 4 mm containers.

  • STV Viscometer – 4 Slots – EN 12846-1/2
  • 4 STV containers Ø 2 mm and corresponding shutters
  • 4 STV containers Ø 4 mm and corresponding shutters
  • 4 Brass lids for viscosity containers
  • 4 standard test tubes 100 mL graduated every 1 mL – Class B
  • 1 IP8C thermometer – Blue liquid
  • 1 Stopwatch 1/100th

* To be ordered separately:

  • STV containers ∅ 10 mm, lids and corresponding shutters
  • 100 mL standardized cylinders with 3 graduations (20, 25, 75 mL) – Class A

F044.137.2021

Confort Kit

The comfort of test tubes with 3 graduations in a kit comprising all types of containers and shutters.

  • STV Viscometer – 4 Slots – EN 12846-1/2
  • 4 STV containers Ø 2 mm and corresponding shutters
  • 4 STV containers Ø 4 mm and corresponding shutters
  • 4 STV containers Ø 10 mm and corresponding shutters
  • 4 Brass lids for viscosity containers
  • 4 Standard test tubes 100 mL with 3 graduations (20, 25, 75 mL) – Class A
  • 1 IP8C thermometer – Blue liquid
  • 1 Stopwatch 1/100th

F044.137.2022

Single & Double slot

VISCOMETER STV | SINGLE SLOT

VISCOMETER STV | DOUBLE SLOT

Specifications

  • Stainless steel structure and brass receptacle for cups
  • Thermostated bath with display/digital regulator (± 0.1°C)
  • Mechanical stirrer
  • Coil with inlet/outlet for connection to the running water network or to a cooling device for optimized temperature maintenance in all laboratory conditions
  • Shutter holder device
  • Power supply: 220 V 50/60 Hz – 300 W

Specifications

  • Stainless steel structure and 2 brass receptacles for cups
  • Thermostated bath with display/digital regulator (± 0.1°C)
  • Mechanical stirrer
  • Coil with inlet/outlet for connection to the running water network or to a cooling device for optimized temperature maintenance in all laboratory conditions
  • 2 Shutter holder devices
  • Power supply: 220 V 50/60 Hz – 300 W

Device alone

* To be ordered seperately:

  • STV vessels and corresponding shutters
  • Lids for containers
  • Standard test tubes 100 mL
  • IP8C thermometer
  • Stopwatch

F025.137.0010

Device alone

* To be ordered seperately:

  • STV vessels and corresponding shutters
  • Lids for containers
  • Standard test tubes 100 mL
  • IP8C thermometer
  • Stopwatch

F025.137.0020

Essential Kit

Everything needed to perform STV tests with Ø 2 and 4 mm containers.

  • STV viscometer – Single station – EN 12846-1/2
  • 1 STV container Ø 2 mm and corresponding shutter
  • 1 STV container Ø 4 mm and corresponding shutter
  • 1 Brass lid for viscosity containers
  • 1 standard 100 mL test tube graduated every 1 mL – Class B
  • 1 IP8C thermometer – Blue liquid
  • 1 Stopwatch 1/100th

* To be ordered separately:

  • Standardized cylinder 100 mL with 3 graduations (20, 25, 75 mL) – Class A
  • Container ∅ 10 mm and shutter

F025.137.0011

Essential Kit

Everything needed to perform STV tests with Ø 2 and 4 mm containers.

  • STV viscometer – Double slot – EN 12846-1/2
  • 2 STV containers Ø 2 mm and corresponding shutters
  • 2 STV containers Ø 4 mm and corresponding shutters
  • 2 Brass lids for viscosity containers
  • 2 standard test tubes 100 mL graduated every 1 mL – Class B
  • 1 IP8C thermometer – Blue liquid
  • 1 Stopwatch 1/100th

* To be ordered separately:

  • 100 mL standardized cylinders with 3 graduations (20, 25, 75 mL) – Class A
  • Containers ∅ 10 mm and corresponding shutters

F025.137.0021

Confort Kit

The comfort of test tubes with 3 graduations in a kit comprising all types of containers and shutters.

  • STV viscometer – Single slot – EN 12846-1/2
  • 1 STV container Ø 2 mm and corresponding shutter
  • 1 STV container Ø 4 mm and corresponding shutter
  • 1 STV container Ø 10 mm and corresponding shutter
  • 1 Brass lid for viscosity containers
  • 1 Standard test tube 100 mL with 3 graduations (20, 25, 75 mL) – Class A
  • 1 IP8C thermometer – Blue liquid
  • 1 Stopwatch 1/100th

F025.137.0012

Confort Kit

The comfort of test tubes with 3 graduations in a kit comprising all types of containers and shutters.

  • STV Viscometer – Double slot – EN 12846-1/2
  • 2 STV containers Ø 2 mm and corresponding shutters
  • 2 STV containers Ø 4 mm and corresponding shutters
  • 2 STV containers Ø 10 mm and corresponding shutters
  • 2 Brass lids for viscosity containers
  • 2 standardized cylinders 100 mL with 3 graduations (20, 25, 75 mL) – Class A
  • 1 IP8C thermometer – Blue liquid
  • 1 Stopwatch 1/100th

F025.137.0022

Accessories

STV CONTAINERS

Ø 2 mm

F025.137.0001

Ø 4 mm

F025.137.0003

Ø 10 mm

F025.137.0005

STV SHUTTERS

Ø 2 mm

F025.137.0002

Ø 4 mm

F025.137.0004

Ø 10 mm

F025.137.0006

STANDARDIZED CYLINDER | EN 12846-1/2

Specifications

  • 3 Precisions marks 20, 25 et 75 ml
  • Class A
  • Useful volume 100 ml
  • Ø 31.5 mm / Height 240 mm
  • Made in France

F044.137.0100

GRADUATED CYLINDER | BASIC

Specifications

  • 100 mL graduated cylinder
  • White graduation each 1 mL
  • Class B

F039.315.3100

STOPWATCH 1/100e

Specifications

  • Function date & clock
  • Start – Stop – Reset
  • 00h00 – 24h00
  • Precision 1/100e on 30 mn
  • Memory / 2 Times

F007.255.0017

BRASS LIDS FOR CONTAINERS

Specifications

  • Adaptable on containers Ø 2, 4 & 10 mm

F044.137.0200

Couvercle de viscosité STV

THERMOMETER IP8C | BLUE LIQUID

Specifications

  • 0 to +45°C, 0.2°C
  • Without mercure : Blue liquid
  • Length : 340 mm
  • Immersion : 65 mm

F024.245.IP8C

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