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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5 Models In Stock

812-RAA122A-I0080-C1B0A3E
812-RAA122A-I0080-C1B0A3E
Kayden Flow, Level & Interface Switch, CLASSIC Series
$1,950.00
  • 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
Kayden Flow, Level & Interface Switch, CLASSIC Series
$2,329.00
  • 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-RAA142A-I0050-C1G0A3E
812-RAA142A-I0050-C1G0A3E
Kayden Flow, Level & Interface Switch, CLASSIC Series
$2,098.00
  • Stainless Steel (A)
  • 2" 300# (142)
  • Length (Inches) (I0050)
  • 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" 300#

  • Insertion 'U' Length

    Custom 'U' Length: Inches

  • 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
Kayden Flow, Level & Interface Switch, CLASSIC Series
$2,460.00
  • 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)
P12 CLASSIC Series
P12 CLASSIC Series
Kayden Flow, Level & Interface Sensor, CLASSIC Series
$850.00
  • Replacement Sensor for Kayden CLASSIC 812 Series
  • Process Connection - Flanged: 
    • Raised Face or RTJ (Ring-Type Joint)
    • 1-1/2", 2", 3", 4"
    • ANSI Rating: 150#, 300#, 600#
  • Insertion 'U' Length: Available in 1/2" or 1 cm increments
    • Min. 2.5" - Max. 120" (6.0 - 305 cm)
  • Temperature Range (Sensor): -45°C to 200°C, -50°F to 392°F
  • Adjustable Set Point Range: 0-254 feet/s, 0-77 meters/s
  • Materials of Construction (Sensor and Flange):
    • 316/316L Stainless Steel
    • Other Metals Available
  • Sensor Connection: Molex 8-Pin
  • UL, FM, CSA, CRN, Single Seal, NACE

Selected Configuration

Model #:

812-RAA141A-I0060-C1G0A1E

Price:
$2,035.00 USD
Availability:
In Stock
Min. Qty:
1 Item

Configuration

reset configuration

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

A05-GP

A05-GP

Kayden General Purpose Remote Cable

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A06-GP

A06-GP

Kayden General Purpose Cable & Connector Assembly

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A06-XP

A06-XP

Kayden Flameproof Cable & Connector Assembly

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A15-321

A15-321

Kayden RS232/RS485 Serial Communication Adapter

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A15-322

A15-322

Kayden RS232/USB Adapter

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A15-323

A15-323

Kayden RS485/USB Adapter

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Flat Duct Flange

Flat Duct Flange

Kayden Flat Duct Flange Mounting Plate

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RCM Software

RCM Software

Kayden RCM Software

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Rolled Duct Flange

Rolled Duct Flange

Kayden Rolled Duct Flange Mounting Plate

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