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.
read more...

Showing 5 Models
View All
Showing 5 Models

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 & 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 & 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

More Details
A06-GP

A06-GP

Kayden General Purpose Cable & Connector Assembly

More Details
A06-XP

A06-XP

Kayden Flameproof Cable & Connector Assembly

More Details
A15-321

A15-321

Kayden RS232/RS485 Serial Communication Adapter

More Details
A15-322

A15-322

Kayden RS232/USB Adapter

More Details
A15-323

A15-323

Kayden RS485/USB Adapter

More Details
Flat Duct Flange

Flat Duct Flange

Kayden Flat Duct Flange Mounting Plate

More Details
RCM Software

RCM Software

Kayden RCM Software

More Details
Rolled Duct Flange

Rolled Duct Flange

Kayden Rolled Duct Flange Mounting Plate

More Details