CLASSIC® 812 Flow, Level, Interface Switch & Transmitter

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CLASSIC® 812 Flow, Level, Interface Switch & Transmitter

CLASSIC® 812 Flow, Level, Interface Switch & Transmitter

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° to 200° C, -50° to 392° F
  • Local Enclosure
    • Aluminum Flameproof, 1" Female NPT Conduit Connection

  • Local Enclosure 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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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° to 200° C, -50° to 392° F
  • Local Enclosure
    • Aluminum Flameproof, 1" Female NPT Conduit Connection

  • Local Enclosure 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.

Filter Inventory

554 models matching criteria
810-RAG-0120-C1B0A3E
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812-RAA142A-I0058-C1B0A3E
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812-RAA121A-I0025-C1B0A1E
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812-RAA121A-I0030-C1B0A1E
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812-RAA121A-I0030-C1B0A3E
KAYDEN® CLASSIC® Thermal Flow, Level, Interface Switch, Modbus, 1" 150# RF High-Hub SST Flange, 3"U Length, 316 SST Sensor, Local Electronics Enclosure with Blind Cover, Approvals: c CSA us (UL Standards), CRN
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812-RAA121A-I0040-C1B0A1E
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812-RAA121A-I0040-C1B0A9E
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812-RAA131A-I0025-C1B0A1E
KAYDEN® CLASSIC® Thermal Flow, Level, Interface Switch, Modbus, 1-1/2" 150# RF High-Hub SST Flange, 2.5"U Length, 316 SST Sensor, Local Electronics Enclosure with Blind Cover, Approvals: c CSA us (UL Standards)
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812-RAA121A-I0045-C1B0A3E
KAYDEN® CLASSIC® Thermal Flow, Level, Interface Switch, Modbus, 1" 150# RF High-Hub SST Flange, 4.5"U Length, 316 SST Sensor, Local Electronics Enclosure with Blind Cover, Approvals: c CSA us (UL Standards), CRN
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812-RAA141A-I0025-C1B0A3E
KAYDEN® CLASSIC® Thermal Flow, Level, Interface Switch, Modbus, 2" 150# RF SST Flange, 2, 5"U Length, 316 SST Sensor, Local Electronics Enclosure with Blind Cover, Approvals: c CSA us (UL Standards), CRN
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CLASSIC® 812

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    CLASSIC® 812

      Specifications

      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, 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
        * 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

      • -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

      Insertion 'U' Length

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

      Flange Size - 1" (DN25)

      • 1" (DN25) - 150#
      • 1" (DN25) - 300#
      • 1" (DN25) - 600#

      Flange Size - 1-1/2" (DN40)

      • 1-1/2" (DN40) - 150#
      • 1-1/2" (DN40) - 300#
      • 1-1/2" (DN40) - 600#

      Flange Size - 2" (DN50)

      • 2" (DN50) - 150#
      • 2" (DN50) - 300#
      • 2" (DN50) - 600#

      Flange Size - 3" (DN80)

      • 3" (DN80) - 150#
      • 3" (DN80) - 300#
      • 3" (DN80) - 600#

      Flange Size - 4" (DN100)

      • 4" (DN100) - 150#
      • 4" (DN100) - 300#
      • 4" (DN100) - 600#

      Flange Size - 5" (DN125)

      • 5" (DN125) - 150#
      • 5" (DN125) - 300#
      • 5" (DN125) - 600#

      Flange Size - 6" (DN150)

      • 6" (DN150) - 150#
      • 6" (DN150) - 300#
      • 6" (DN150) - 600#

      Flange Size - 8" (DN200)

      • 8" (DN200) - 150#
      • 8" (DN200) - 300#
      • 8" (DN200) - 600#

      Flange Size - 10" (DN250)

      • 10" (DN250) - 150#
      • 10" (DN250) - 300#
      • 10" (DN250) - 600#

      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 & 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

      Enclosure/Body Details

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

      Flange Material

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

      Remote Electronics Enclosure & Cover

      • Blind Cover - Flameproof
      • Glass Lens Cover - Flameproof

      Wetted Materials

      • 316/316L Stainless Steel
      • All-welded construction
      • Hastelloy® C-276
      • Other metals available
      • Titanium Grade 2

      Cover - For Local Enclosure

      • Blind Cover - Flameproof
      • Glass Lens Cover - Flameproof

      Sensor/Probe Style

      • Insertion

      Applications

      • Flow
      • Interface
      • Level

      Typical Applications

      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