KROHNE, IncPeabody, MA
 
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 Level Switches – OPTISWITCH 3000 C Series
 
Vibration Level Switches for solids
  • Highly robust tuning fork
  • Insensitive to build-up
  • Set-up without filling
  • Detection of solids in water
  • Maintenance-free

Cement or aggregates are placed in interim storage in multiple chamber silos. When the chambers are filled, large quantities of dust are generated. Depending on the consistency of the aggregate, different material cones are formed and the product properties can change from filling to filling.
 
OPTISWITCH offers additional protection against overfilling the aggregate silo. The flexible suspension cable avoids mechanical strain caused by movements of the bulk solid. A filling is not necessary for setup. Because OPTISWITCH has practically no moving parts, it is not subject to wear.
 
Versions
  • OPTISWITCH 3100 C - Compact version
  • OPTISWITCH 3200 C - Version with suspension cable
  • OPTISWITCH 3300 C - Version with tube extension

Applications
Bulk Solids
  • High ruggedness of the tuning fork
  • High abrasion resistance
  • Insensitive to build-up
  • Set-up without filling

Plastics Processing
  • Tuning fork suitable up to density < 20 g/l (z.B. Aerosile)
  • Product independent switch point
  • Set-up without filling

Hydroelectric Power Station Sedimentation Tank
  • Detection of solids in water
  • Set-up without filling
  • Maintenance-free
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 Level Switches – OPTISWITCH 4000 | 5000 Series
 
Universal vibration level switches for liquids
  • Operates up to 250°C / 480°F and 64 bar / 925 psi
  • Pump dry-run detection
  • High reliability due to permanent fault monitoring function

OPTISWITCH 4000/5000 series is a level sensor that uses a vibrating fork for detecting level. It is designed for use in all liquids. It is not affected by foam and external vibration. It is also unaffected by variations of product properties such as εr, viscosity etc.
 
Highlights
  • Output options: relay, transistor, NAMUR, contactless electronic switch and 2-wire
  • 5000 series: Plastic, aluminium or stainless steel housings
  • LED signal lamp for indicating the switching condition (with plastic housing only)
  • 5000 series: Large choice of materials for wetted parts. This includes 316L, Hastelloy C4, enamel, ECTFE and PFA.
  • 5000 series. Probe length: 53...6000 mm / 2...236"
  • Repeatability: +/-2 mm
  • Thread connections G/NPT ¾; flange sizes from DN25 PN40; Triclamp 1" or 2" and other hygienic fittings

Industries
  • Chemicals
  • Food & Beverage
  • Water & Wastewater
  • Oil & Gas

Applications
  • Reactors
  • Hygienic and sanitary applications
  • Process and storage tanks for liquids
  • Dry-run and overfill protection

Features and Options
 
OPTISWITCH 4000 - The economical version
  • Simple and robust measuring system, virtually unaffected by the chemical and physical properties of liquids
  • Easily mountable in pipelines from DN 25, vessels and tanks
  • Outputs: contactless electronic switch or transistor

OPTISWITCH 5100, 5150 - The compact version
  • Standard or HT version, large array of process fittings, housings and electronics
  • Outputs: relay, transistor, 2wire, NAMUR or contactless electronic switch
  • Process connection option for high temperature up to 250°C / 482°F
  • With all relevant approvals (ATEX etc.)
  • Version OPTISWITCH 5150 with polished tuning fork e.g. for food processing

OPTISWITCH 5200, 5250 - The special version with probe extension
 
  • Standard or HT version, large array of process fittings, housings and electronics
  • Probe length up to 6000 mm / 236"
  • Outputs: relay, transistor, 2wire, NAMUR or contactless electronic switch
  • Process connection option for high temperature up to 250°C / 482°F
  • With all relevant approvals (ATEX etc.)
  • Version OPTISWITCH 5150 with polished tuning fork e.g. for food processing

 
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 Level Switches – LS 6500 | LS 6600
 
Switch for level detection and dry-run protection
  • Optimised sensor geometry, easy to clean
  • Measures products with dielectric constant > 1.5
  • Maintenance-free
  • Small and compact version LS 6600

The LS 6500 and LS 6600 are hygienic level switches for level detection and dry-run protection for liquids andsolids. Through its small and optimal sensor shape, the device is easy to clean and the risk ofclogging of sticky products is minimised.
 
The device measures liquids such as water and beer and even viscous and sticky products such as honey or toothpaste. Dry medias (sugar or flour) can be also measured. The measurement is precise and not affected by the mounting position. Coating of the sensor or condensate are not detected.
 
The LS 6500 and LS 6600 are resistent against CIP and SIP agents. Hygienic installation is possible with thecomprehensive range of accessories.
 
Highlights LS 6500
  • Process temperature -40 ...+200°C / -40...+392°F (sliding connection)
  • Insensitive to build up or foam
  • Measures alternating media
  • LED switching point indication through cover
  • Hygienic swith completely in Stainless Steel
  • Excellent for media separation
  • No blockage of the pipeline

Highlights LS 6600
  • Process temperature -40 ...+115°C / -40...+239°F
  • Insensitive to build up or foam
  • Measures alternating media
  • LED switching point indication
  • Hygienic switch completely in Stainless Steel
  • Excellent for media separation
  • No blockage of the pipeline

Industries
  • Food & Beverage
  • Pharmaceuticals
  • Cosmetics

Typical applications LS 6500
  • Level detection of mustard
  • Dry-run protection of cream
  • Level detection of ketchup

Typical applications LS 6600
  • Level detection of mustard
  • Dry-run protection of cream
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 Level Switches – LS 72xx Series
 
LS 7200, LS 7201, LS 7210, LS 7211, LS 7220, LS 7221, LS 7230, LS 7231, LS 7240, LS 7241
 
Level switches for liquids for level detection or dry-run protection
  • optimized flow geometry
  • precise switching point
  • hygienic installation

The hygienic conductive sensors type LS 7000 series are used for level detection or dry run protection on conductive liquids.
 
These sensors pick up the electrical resistance of the tank product when the electrode is in contact with the product. The wall of the vessel or the pipe acts as reverse potential.
 
Available are stump electrodes for pipe installation
 
(LS 7200/7201) or mono or multiple rods (LS 7210-7240) for installation in tanks.
 
The sensor rods are from stainless steel or coated, to make them insensitive for foam or product build up. Sensor rods can be shortened without special tools.
 
The electronics is either integrated in the electronic compartment or can be placed in the panel room (electronic modules LEM 100/200).
 
On varying products (with different conductivities), the sensitivity can be adjusted via a contact input.
 
With a huge variety of hygienic process connections, a crevice free installation can be achieved. These connections are EHEDG approved regarding their simple cleanability.
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