On place les capteurs de force rond dans les support du silo (par pression) et on mesure le changement du tension dans les support quand le poids dans le silo varie.

Le niveau du silo peut aussi bien être indiquer en tonnes quâen pourcentage.
A coté de Ramsey a un grand assortiment de capteur de force dans sa gamme de livraision. Avec ceci on peut réaliser des systèmes de pesage statique très précis et des systèmes de pesage de batch, eventuellement aussi étallonable.

Pour ce qui concerne le processeur il y a plusiers possibilités (Smart junction box, Mini ou Micro-Tech).

Indicateurs de niveau Hycontrol & Bindicator

• Hycontrol & Bindicator sondes capactifs
  
• Hycontrol interrupteurs de niveau à admittance
  
• Hycontrol détecteurs de niveau à lames vibrantes
  
• Roto-Bin-Dicator interrupteurs rotatifs
  
• Hycontrol interrupteurs micro-ondes
  
  

Mesure de niveau

• Hycontrol mesure de niveau par ultrason
• Hycontrol mesure de niveau radar
• Hycontrol radar à impulsions guidée
• Bindicator Yo Yo

Hycontrol – Indicateurs de niveau & mesure de niveau

Hycontrol, le fabricant principal en Angleterre des indicateurs de niveau et mesure de niveau, vous offre une très vaste batterie d’instruments pour les solides et les liquides.

La gamme comprend des interrupteurs rotatifs, des détecteurs de niveau à lames vibrantes, des sondes capactifs, des interrupteurs de niveau à admittance concernant les indicateurs de niveau.
Pour le mesure de niveau sont ultrason, radar et radar à impulsions guidée les possibilités de livraison.

Pas seulement on peut fournir les composants mais également l’armoire de commande faites suivant vos souhaits.

En plus on peut faire le montage méchanique et la mise-en-service.

Hycontrol a une vaste batterie des indicateurs de niveau pour les liquides et les solides:

• des interrupteurs à flotteurs
  
• des interrupteurs rotatifs
  
• des interrupteurs capactifs et admittance
  
• détecteurs de niveau à lames vibrantes
  
• des interrupteurs micro-ondes
  
• mesure de niveau non invasive

Une vaste batterie de mesure de niveau pour les solides et les liquides:

• mesure de niveau par ultrason
  
• radar
  
• radar à impulsions guidée
  
• sonar
  
• mesure de niveau hydrostatique

Capacitance Level Switches: Liquids/Solids

Hycontrol ME capacitive level switches provide simple, accurate and reliable level control for a wide range of applications. They are suitable for use on liquids, solids, slurries, pastes, granules, powders and pellets in high temperature, high pressure and corrosive environments.

Unlike some other capacitive switches, this unit works independently of the tank walls using an integral grounding sleeve without the need for a reference probe, which enables it to be used in concrete, plastic or other non metalic tanks.

This technology also provides an ideal solution for interface detection applications such as oil on water and liquid detection underneath a layer of foam.

Admittance Level Switches: Liquids/Solids

The Hycontrol range of Admittance level switches provide simple, accurate and reliable level control for a wide range of applications. They are suitable for use on liquids, solids, slurries, pastes, granules, powders and pellets in high temperature, high pressure and corrosive environments.

The main advantage offered by using this admittance range of switches is their ability to totally ignore product build up on the sensing probe.

This unique design utilises a protective insulation electrode between the conventional main electrode and the grounding sleeve which enables the electronics to distinguish between coatings and actual product level.

This technology also provides an ideal solution for interface detection applications such as oil on water and liquid detection underneath a layer of foam.

Tuning fork: Liquids

As the damping effect (resistance to vibration) of low viscosity liquids is very small, it is common to use two relatively wide blades to sense the presence of liquid levels. These blades can be short in length for minimal intrusion into the vessel or for use in pipes.

This rugged design of switch is used throughout the process industries. It is available with a wide range of flanged or screwed process connections and can have extensions, enabling the probe to reach 3 metres into a tank if required.

The wetted parts of standard switches are 316 stainless steel but special Halar coated and Hastelloy switches are used for extremely corrosive applications and hygienic probes are available for the food industry.

The switch has visual indication of its on/off status and a test point on the side of the housing to allow an operator to check the function of the switch.

An intrinsically safe and explosion proof version of the switch is available for hazardous areas.

Vibrating: Solids

The design of a vibrating level switch for solids must be fundamentally different to the design described for liquids. If two large parallel blades were used on powders or solids it would be too easy for product to build-up and become lodged between the blades causing the oscillations of the switch to stop regardless of product level.

For solids applications on products ranging from cornflakes to coal, it is preferable to have only one blade in contact with the product. This eliminates the potential for bridging between the forks and ensures that the switch does not give false alarms.

The operating principle is the same for all vibrating probe level switches. A piezo-electric crystal is used to force a blade to oscillate at its fundamental frequency (natural resonance). When the blades come into contact with the process medium the natural frequency of oscillation is damped; the electronics sense the change in frequency which causes the unit to switch.

The different electronic outputs to choose from allows the user to switch a load on/off or to interface directly with a computer. The units can be programmed to sense high or low level and failsafe high or low, with adjustable sensitivity to eliminate false switching. The switch is only sensitive at the tip so minimising the effect of build-up on tank walls.

Microwave: Liquids/Solids

As the damping effect (resistance to vibration) of low viscosity liquids is very small, it is common to use two relatively wide blades to sense the presence of liquid levels. These blades can be short in length for minimal intrusion into the vessel or for use in pipes.

This rugged design of switch is used throughout the process industries. It is available with a wide range of flanged or screwed process connections and can have extensions, enabling the probe to reach 3 metres into a tank if required.

The wetted parts of standard switches are 316 stainless steel but special Halar coated and Hastelloy switches are used for extremely corrosive applications and hygienic probes are available for the food industry.

The switch has visual indication of its on/off status and a test point on the side of the housing to allow an operator to check the function of the switch.

An intrinsically safe and explosion proof version of the switch is available for hazardous areas.

Ultrasonic Microflex C/LR: Liquids/Solids

Microflex LR pushes the boundaries of non-contact ultrasonic level measurement. This new range of Smart Level Transmitters is capable of measuring distances in excess of 60 metres and is suitable for solids and liquids.

Using new technology developed with low frequencies these new transmitters are capable of measuring in extremely difficult applications, including very dusty and dirty environments, where most traditional ultrasonics will fail. Level measurement on difficult solids applications in excess of 60m is now possible with two wire technology.

The Microflex LR is available in two configurations with two wire technology; an Integral display (MI) four-button programmable instrument and a SMART blind (MS) version.

The compact construction coupled with integral LCD display, three push buttons under the lid for security, and just eight parameters to set means that MICROFLEX-C is probably the simplest level transmitter on the market to calibrate and use.

MICROFLEX-C can be configured for either level or distance in meters, feet or a percentage of span. Empty distance and span can be entered in real values, anywhere within the instruments range.

Ultrasonic Miniflex LR: Liquids/Solids

With a measuring range of up to 10m, the Hycontrol Miniflex is a versatile unit from Accurate Detection for a wide range of application from small vessels to large process tanks.
The Hycontrol Miniflex LR can be configured to display Litres, Gallons, Tonnes, KG, m3 OR %.

When used for flow, standard flume and weir configurations are pre-programmed for easy of setup. For non-standard flume applications an option for 24 point linearisation table can be entered. The Hycontrol Miniflex LR has substantial pump control functionality built in, duty standby/assist, alternating duty pump run-on etc.

The Hycontrol Miniflex LR is capable of having input from two transducers to the one controller to enable differential measurement of screen rakes, filters etc.Accurate Detection has a large number of the Hycontrol Miniflex LR installed in various quarry, water and waste, process and chemical application.

Features of the Hycontrol Miniflex LR:

• Non-contact ultrasonic technology with no moving parts providing long life and reliability
  
• Versatile technology for liquids, slurries, pastes and solids
  
• Advanced echo extraction for stirrer and spurious signal avoidance
  
• Simple install, commission and retrofit with a wide range of transducer options
  
• Dual supply voltage as standard – will accept AC or DC
  
• Hazardous area approval standard on transducers
  
• Chemically resistant transducer materials
  
• Five button programming with simplified commissioning via software flowchart

Radar VG5XX series: Liquids/Solids

Reflex VG Series Two & Four Wire FMCS Radar

The Reflex VG Series of FMCW Radar products are unaffected by pressure, temperature, viscosity, vacuum, foam, dust or changes in dielectric constant. They can measure virtually any product in either Direct or TBF mode utilising either Horn, Wave Guide or Wave Stick antenna.

The unique Tank Bottom Following (TBF) mode in all the VG Series enables products with dielectric constants as low as 1.1 to be measured. For process vessels with complex internal structures the unique Empty Tank Spectrum (ETS) can be utilised to damp out all unwanted reflections from pipes, heating coils and agitators.

TDR VF03/VF7 series: Liquids/Solids

The Reflex VF Series range of TDR products is ideal for the measurement of liquids, powders and granules to a range of 60m. Unaffected by pressure, temperature, viscosity, vacuum, foam, dust, changes in dielectric constant or coating of the probe, the VF Series can measure virtually any product in either Direct or TBF mode utilising any one of its seven probe types.

Rembe-Bindicator interrupteur

Le Roto-Bin-Dicator: Cet interrupteur de niveau universel bien connu est utilisé dans le traitement des matériaux en vrac secs. Son fonctionnement repose sur la mise en mouvement d’un rotor à vitesse de révolution lente: lorsque le rotor entre en contact avec le matériau, le moteur s’arrête, un relais est activé et le contacteur de relais peut générer un signal sonore ou visuel.. (1)

VRF-Series: Ce détecteur de trop-plein recourt à des radiofréquences variables pour la détection de la présence ou de l’absence de matériau dans un silo. Le système reconnaît les caractéristiques de l’air dans un silo vide et s’autocalibre en fonction de la confguration (fonction EZ-Cal® II).. (2)