CLASSIC 812 Flow, Level, Interface Switch & Transmitter

by Kayden

The Kayden CLASSIC 812 Flow, Level and Interface Switch & Transmitter features a precision welded, highly accurate stainless steel sensor.

Ideal for liquids, gases & slurries in a clean or dirty process.

The CLASSIC 812 is available with a Raised Face or RTJ Flange, in a wide range of flange sizes, ANSI ratings and insertion lengths. All Kayden models feature a rugged flameproof enclosure with blind or lens covers available.

Kayden’s advanced digital electronics will revolutionize the way you monitor and control your process.

  • Process Connection

    • Raised Face or RTJ Flange
  • Adjustable Set Point Range

    • 0-254 feet/s, 0-77 meters/s
  • Insertion 'U' Length

    • Available in 1/2" or 1 cm increments
    • Min. 2.5" - Max. 120" (6.0 - 305 cm)
  • Input Power

    • 12-24 VDC & 115-230 VAC, 50-60 Hz
  • Operating Pressure (Maximum)

    • Per Flange Rating, ASME B16.5
  • Temperature Range (Sensor)

    • -45°C to 200°C, -50°F to 392°F
  • Local Enclosure

    • Aluminum Flameproof, 1" FNPT Conduit Connection
  • Cover

    • Blind or Glass Lens, Flameproof
  • Wetted Materials

    • 316/316L Stainless Steel
    • Other Materials Available
  • Outputs/Communications

    • Two Independent Relays (SPDT), 4-20 mA, Modbus
    • Rated 120 Vac max, 30 Vdc max, 4A max
  • Approvals

    • FM
    • CSA
    • CRN
    • Single Seal
    • NACE
    • NEMA 4X
The above description encapsulates the entire product series. Specifications for individual configurations may vary depending on the selection chosen.
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Kayden assembles most products on receipt of order.
812-RAA122A-I0080-C1B0A3E

812-RAA122A-I0080-C1B0A3E

  • Stainless Steel (A)
  • 1" 300# (122)
  • Length (Inches) (I0080)
  • Blind Cover (B)
  • CSA, CRN (3)
  • Sensor Material
    316/316L Stainless Steel
  • Flange Material
    316/316L Stainless Steel
  • Process Connection Flange Type
    Raised Face
  • Flange Size & ANSI Rating
    1" 300#
  • Insertion 'U' Length
    Custom 'U' Length: Inches
  • Cover for Local Enclosure
    Blind Cover
  • Remote Electronics Enclosure & Cover
    Not Required
  • Agency Approvals
    CRN & CSA (Canada)
812-RAA141A-M0310-C1G0A3E

812-RAA141A-M0310-C1G0A3E

  • Stainless Steel (A)
  • 2" 150# (141)
  • Length (Centimeters) (M0310)
  • Glass Lens Cover (G)
  • CSA, CRN (3)
  • Sensor Material
    316/316L Stainless Steel
  • Flange Material
    316/316L Stainless Steel
  • Process Connection Flange Type
    Raised Face
  • Flange Size & ANSI Rating
    2" 150#
  • Insertion 'U' Length
    Custom 'U' Length: Centimeters
  • Cover for Local Enclosure
    Glass Lens Cover
  • Remote Electronics Enclosure & Cover
    Not Required
  • Agency Approvals
    CRN & CSA (Canada)
812-RAA161A-I0180-C1G0A1E

812-RAA161A-I0180-C1G0A1E

  • Stainless Steel (A)
  • 4" 150# (161)
  • Length (Inches) (I0180)
  • Glass Lens Cover (G)
  • CSA (1)
  • Sensor Material
    316/316L Stainless Steel
  • Flange Material
    316/316L Stainless Steel
  • Process Connection Flange Type
    Raised Face
  • Flange Size & ANSI Rating
    4" 150#
  • Insertion 'U' Length
    Custom 'U' Length: Inches
  • Cover for Local Enclosure
    Glass Lens Cover
  • Remote Electronics Enclosure & Cover
    Not Required
  • Agency Approvals
    CSA (Canada & US)

Selected Configuration

812-RAA141A-I0060-C1G0A1E

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Configuration

reset configuration

Flow

Ideal Process Conditions

Liquids:

  • Consistent process composition & temperature
  • Sufficient straight run flow profile (minimizes turbulence)
  • Recommended minimum of 5 pipe diameters from any disturbance

Air & Gas:

  • Consistent process composition & temperature
  • Sufficient straight run flow profile (minimizes turbulence)
  • Clean and dry

Slurries:

Emulsion:

  • Consistent process composition & temperature
  • Sufficient straight run flow profile (minimizes turbulence)
  • Consistent process composition & temperature
  • Sufficient straight run flow profile (minimizes turbulence)

Undesirable Process Conditions

Liquids:

  • Inconsistent process composition or temperature
  • Insufficient straight run
  • Turbulence
  • Aerated fluids

Air & Gas:

  • Inconsistent process composition or temperature
  • Wet or saturated air/gas

Slurries:

  • Inconsistent process composition or temperature
  • Insufficient straight run
  • Turbulence
  • Aerated fluids

Emulsion:

  • Inconsistent process composition & temperature
  • Insufficient straight run
  • Turbulence
  • Aerated fluids

Solids:

  • Dry granulated processes are NOT good candidates for thermal switches

Level

Ideal Process Conditions

Liquids:

  • Consistent process composition
  • Non-turbulent

Slurries:

  • Consistent process composition

Emulsion:

  • Consistent process composition

Undesirable Process Conditions

Liquids:

  • Inconsistent process composition
  • Turbulence
  • Large temperature swings

Slurries:

  • Inconsistent process composition
  • Turbulence
  • Large temperature swings

Emulsion:

  • Inconsistent process composition
  • Turbulence
  • Large temperature swings

Solids:

  • Dry granulated processes are NOT good candidates for thermal switches

Interface

Ideal Process Conditions

Liquid to Liquid::

  • Consistent process composition & temperature
  • Non-turbulent applications
  • Large differential in thermal conductivities

Air or Gas to Liquid:

  • Consistent process composition & temperature
  • Non-turbulent applications
  • Dry gas

Emulsion:

  • Consistent process composition & temperature
  • Large differential in thermal conductivities

Undesirable Process Conditions

Liquid to Liquid::

  • Inconsistent process composition or temperature
  • High aeration
  • High turbulence
  • Small differential in thermal conductivities

Air or Gas to Liquid:

  • Inconsistent process composition or temperature
  • High turbulence

Emulsion:

  • Inconsistent process composition or temperature
  • High aeration
  • High turbulence
  • Small differential in thermal conductivities

Solids:

  • Dry granulated processes are NOT good candidates for thermal switches

Flow

  • Pump Protection – Dry Alarm
  • Leak Detection
  • Flow Monitoring & Verification
  • Tank Overflow Protection
  • Flare Gas Monitoring
  • Monitoring Purge Air Flow
  • Lube Oil Systems
  • Vent Monitoring
  • Natural Gas to Boilers
  • Emergency Eye Wash & Shower Stations
  • Drain Line Flow
  • High Pressure Flows
  • Tanker Loading & Unloading
  • Relief Valve & Rupture Disk Flow Monitoring
  • Remote Indication of Flow via Analog Output & Digital Communications
  • Chemical Injection/Additive Flow Monitoring

Level

  • Storage Tanks
  • Oil Separators & Treaters – High, Low & Interface Level
  • Sumps – All Types of fluids ( Water, Oil, etc. )
  • Free Water Knock-out Tanks – High, Low and Interface Level
  • Leak Detection (Accumulation Reservoir)
  • Tank Overflow
  • Sampler Systems
  • Sand Separators

Interface

  • Interface Control in Separation Vessels
  • Interface Detection
  • Interface Control & Level Detection in Settling Vessels

Media

  • Liquids, Air & Gases
  • Hazardous & General-Purpose Areas
  • Slurries
  • Corrosive Liquids

Agency Approvals

  • CRN - Canadian Registration Numbers
    1" & 1-1/2” Flanges   Approved for All Provinces & Territories
    • 812-RAA Series : CRN # 0F13787.2C
    • 316/316L Stainless Steel; Pipe NPS 1/2" Schedule 80
    • Code of Construction: ASME B31.3
    • Maximum Working Pressure:
      • Class 150  (275 psi, 1896 kPa, 18.9 bar)*
      • Class 300  (720 psi, 4964 kPa, 49.6 bar)*
      • Class 600  (1440 psi, 9928 kPa, 99.2)*
      • or per flange rating, whichever is less
    • 2.5" to 120" 'U' Length
    2" through 10" Flanges   Approved for All Provinces & Territories
    • 812-RAA Series : CRN # 0F13773.2C
    • 316/316L Stainless Steel; Pipe NPS 3/4" Schedule 80
    • Code of Construction: ASME B31.3
    • Maximum Working Pressure:
      • Class 150  (275 psi, 1896 kPa, 18.9 bar)*
      • Class 300  (720 psi, 49643 kPa, 49.6 bar)*
      • Class 600  (1440 psi, 9928 kPa, 99.2)*
      • or per flange rating, whichever is less
    • 2.5" to 120" 'U' Length
    * Pressure derated by temperature & per flange class rating (ASME B16.5-2013, Table II-2-2.2).
    Please contact Kayden Instruments for further information.


  • CSA - Local (Sensor) Enclosure
    • Flameproof: Class I, Division 1, Groups B, C and D; Ex d IIB + H2
    • AEx d IIB + H2 (Class I, Zone 1, Group IIB + H2)
    • Temperature Code: T3
    • Enclosure Type 4 / IP55
    • Single Seal Approved per ANSI / ISA 12.27.01-2003
  • CSA - Remote Electronics Enclosure - Optional
    • Flameproof: Class I, Groups B, C and D; Ex d IIB + H2
    • AEx d IIB + H2 (Class I, Zone 1, Groups IIB + H2)
    • Temperature Code: T3
  • FM - Local (Sensor) Enclosure
    • Flameproof: Class I, Division 1, Groups B, C and D
    • Temperature Codes: T2D (Ta=75º C); T3 (Ta=65º C)
    • Class I, Zone 1, AEx d IIB + H2
    • Enclosure Type 4 / IP55
  • FM - Remote Electronics Enclosure - Optional
    • Flameproof: Class I, Division 1, Groups B, C and D
    • Temperature Codes: T2D (Ta=75º C), T3 (Ta=65º C)
    • Class I, Zone 1, AEx d IIB + H2
    • Enclosure Type 4 / IP55

Principle of Operation

  • Thermal (Calorimetric)

Environmental Protection

  • NEMA 4 / IP55

Operating Pressure - Sensor

  • Maximum Working Pressure per Flange Rating

Operating Temperature - Electronics

For temperatures above +149° F (+65° C), the electronics must be remotely mounted.
  • -55° to 65° C (-67° to 149° F)

Operating Temperature - Sensor

  • -45° to 200° C (-50° to 392° F)

Storage Temperature

  • Product should be stored in a clean and dry environment between -30° and 60° C (-22° and 140° F)

Accuracy

  • Flow Service:
    ±1.0% of Set Point Velocity over Operating Range of ±28º C (±50º F)
  • Level Service:
    ±0.64 cm (0.25")

Switch Point Range

  • Gases:
    0.25 to 200 SFPS, 0.08 to 60 SMPS - standard condition 21° C (70° F) at 14.7 psi (1 atm)
  • Hydrocarbon-based Liquids:
    0.01 to 5.0 FPS, 0.003 to 1.50 MPS
  • Water-based Liquids:
    0.01 to 3.00 FPS, 0.003 to 0.9 MPS

Response Time

  • Approximately 0.5 to 30 Seconds

Process Connection - Flanged

  • 4" (DN100) - 150#
  • 4" (DN100) - 300#
  • 4" (DN100) - 600#
  • 3" (DN80) - 150#
  • 3" (DN80) - 300#
  • 3" (DN80) - 600#
  • 8" (DN200) - 150#
  • 8" (DN200) - 300#
  • 8" (DN200) - 600#
  • 1" (DN25) - 150#
  • 1" (DN25) - 300#
  • 1" (DN25) - 600#
  • 2" (DN50) - 150#
  • 2" (DN50) - 300#
  • 2" (DN50) - 600#
  • 5" (DN125) - 150#
  • 5" (DN125) - 300#
  • 5" (DN125) - 600#
  • 1-1/2" (DN40) - 150#
  • 1-1/2" (DN40) - 300#
  • 1-1/2" (DN40) - 600#
  • 6" (DN150) - 150#
  • 6" (DN150) - 300#
  • 6" (DN150) - 600#
  • 10" (DN250) - 150#
  • 10" (DN250) - 300#
  • 10" (DN250) - 600#

Insertion 'U' Length

2.5" (6.4 cm) is standard.
  • Custom 'U' Lengths 2.5" to 120" (6.4 cm to 305 cm) Available in 1/2" (1.0 cm) Increments.

Flange Type

  • Raised Face
  • RTJ - Ring Type Joint

Switch Type

  • 2 SPDT sealed relay contacts rated @ 4 amps resistive 230 VAC or 30 VDC Max, individually adjustable

Input Power

  • 12-24 Vdc; 120-240 Vac, 50-60 Hz
  • Power Consumption: Maximum 4.8 W (Fully Configured)
  • Universal Power Input

Communication

  • MODBUS RTU Communication-Alarms, Flow Status and Diagnostics
  • RS-485 using Kayden's Remote Control and Monitoring Software (RCMS) or other Modbus Compatible Software

Output

  • 4-20 mA (Thermal Signal, Scaleable) Rates 120 Vac Maximum, 30 Vdc Maximum, 4A Maximum

Remote Control and Monitoring Software

  • Adjust Relay Modes
  • Adjust Set Points 1 and 2
  • Load or Save User Settings
  • Lock or Unlock the Display Panel to Protect the Settings
  • Many other Adjustable Features
  • Modify Heater Settings to Optimize Response Time
  • Monitor Operating Status
  • Operated via a Personal Computer Locally or from a Remote Control Center
  • Visualize the Actions of the Process via the Graphical Display

Electronics - Standard Features

  • * Only configurable from the Kayden RCM software
  • 100% Digital Design. Electronics are Environmentally Sealed
  • 4-Adjustable Independent Switch Point Timers
  • Automated Redundant Self-Test Diagnostics
  • Display Panel Lock-Out*
  • Easy Setup: No Mechanical Jumpers or Trim Pots
  • Incrementally Adjustable Heater Power (5% steps) with Automatic Over-Range Protection
  • Intelligent User Interface with Push-Button and Constant Display of Operation (Flow/Level)
  • Start-Up Bypass Timer
  • Temperature Compensation
  • Temperature Mode*: Process Temperature may be Displayed/Graphed in Flow/Level Mode

Enclosure/Body Material

  • Copper-Free Aluminum (Does not exceed 0.4% Copper)

Enclosure Finish

  • Powder Coated Polyester TGIC

Flange Material

  • 316/316L Stainless Steel
  • Other Exotic Metals Available

Enclosure/Body Details

  • 1" Female NPT Conduit Connection
  • Buna-N O-Ring on Cover

Remote Electronics Enclosure and Cover

For temperatures above +65° C (+149° F), the electronics must be remotely mounted.  If cables are required, we recommend the Kayden A06-XP Flameproof Cable & Connector Assembly.

These covers are acceptable for use in hazardous areas.
  • Blind Cover - Flameproof
  • Glass Lens Cover - Flameproof

Wetted Materials

316/316L stainless steel is standard.
  • 316/316L Stainless Steel
  • All-welded construction
  • Hastelloy C-276
  • Other metals available
  • Titanium Grade 2

Cover - For Local Enclosure

For local enclosure types, blind cover is standard.
  • Blind Cover - Flameproof
  • Glass Lens Cover - Flameproof

Sensor/Probe Style

  • Insertion

Applications

  • Flow
  • Interface
  • Level

Principal of Operation Details

Kayden sensors incorporate two thin-film platinum Resistance Temperature Detectors (RTDs) and a separate heater element. The Reference RTD senses the actual process condition (as temperature). Heat is applied to the Active RTD by the heater element which is controlled by the microprocessor.

The microprocessor makes continuous comparisons between the temperature readings from the Reference RTD and the Active RTD (values stored as a result of setup programming). As process conditions change, for example increased velocity in a flow application, the Reference RTD “senses” the change and the microprocessor adjusts the heater and changes the relay state if required.

The CLASSIC 800 can be setup with a narrow range to detect very low flows or very small changes in the process, or with a wider range to ignore small fluctuations.

The CLASSIC 800 series switches and transmitters are digital devices and will not require calibration. By design they cannot drift or change in any way unless they suffer physical damage. After correct setup, the CLASSIC 800 will be stable and repeatable under stable process conditions.

The CLASSIC 800 may be setup in the field by the user for flow, level or interface with air, gases, liquids or slurries. The CLASSIC 800 may be setup to display process temperature through the RCM Software while functioning as a flow, level or interface switch/transmitter.

Flow / No Flow
  • When the velocity of the process media is low or nonexistent, less thermal energy (heat) is dissipated from the heated sensor. As the velocity increases the amount of energy dissipated by the process media increases, thereby increasing the Thermal Signal.

    The Thermal Signal is smallest (left-most LED illuminated) in a no-flow state and increases (LED moves to the right) as flow increases.

Liquid Level
  • Air and other gases do not dissipate heat as well as liquids. Therefore, the Thermal Signal is smallest when in a process that does not dissipate heat well (air dissipates heat slower than water).

    The Thermal Signal is smallest (left-most LED illuminated) in a dry, motionless state and increases as the fluid covers the sensor.

Liquid Level / Interface
  • The CLASSIC 800 can be setup to detect the difference between most liquids if there Interface is very little or no velocity and each material has a unique thermal property (for example oil and water in a knockout tank).

View Online

Download

A05-GP

Kayden General Purpose Remote Cable

A06-GP

Kayden General Purpose Cable & Connector Assembly

A06-XP

Kayden Flameproof Cable & Connector Assembly

A15-321

Kayden RS232/RS485 Serial Communication Adapter

A15-322

Kayden RS232/USB Adapter

A15-323

Kayden RS485/USB Adapter

D05-CLC-E

Kayden Installation & Operation Manual for CLASSIC 800 Series (Paper Format)

D10-0301-E

Kayden Mill Test Reports, English

D10-0401-E

Kayden Spare Parts List (2 Years Operation)

D10-0501-E

Kayden Certificate of Conformance

D10-0503-E

Non-Destructive Examination (NDE)

D10-0504-E

Kayden Certification of Dye Penetrant Inspection

D10-0505-P-800-E

Kayden Functional Test Procedure, Classic 800, English

D10-0505-R-800-E

Kayden Functional Test Reports

D10-0508-E

Kayden Hydrostatic Test Report on Sensing Element

D10-0508-P-E

Kayden Hydrostatic Test Certificate

D10-0510-E

Kayden Agency Approval Certificate, CSA, CRN, NACE

D12-1002E

Kayden Performance Test Curve, NIST Traceable

D15-2002-E

Kayden Dimension Outline Drawing & Parts List, Paper

E1-25

Kayden Electronic Documentation Package with Transmittal

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