View of the Electronics Module Plugged into the mounting plate of the enclosure of the Kayden CLASSIC 810 Series Flow and Level Switch

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Kayden CLASSIC 810 Thermal Flow, Level, Interface Switch & Transmitter

Three-Quarter Front View of the Kayden CLASSIC 810 Series Threaded Flow and Level Switch

View of the Electronics Module of the Kayden CLASSIC 810 Series Flow and Level Switch

View of the Electronics Module Plugged into the Enclosure of the Kayden CLASSIC 810 Series Flow and Level Switch

The Kayden CLASSIC 810 Flow, Level, Interface Switch & Transmitter features a precision-welded, highly accurate stainless steel sensor. Alarms and trip-points are field-configurable for flow, temperature, high or low, hysteresis, time delay, and more.

Ideal for liquids, gases, and slurries in a clean or dirty process, the CLASSIC 810 is available in a wide range of thread sizes and insertion lengths. Kayden's electronic thermal dispersion flow and level switches have no moving parts to foul, clog, or stick, resulting in exceptional reliability and requiring little to no maintenance.

With no moving parts and minimal invasiveness, Kayden's thermal flow and level switches provide a highly repeatable, accurate, low cost of ownership, long life, and easy-to-install solution for demanding air, gas, liquid, and slurry applications.

All Kayden® CLASSIC® models feature a rugged flameproof enclosure with blind or glass lens covers. Kayden’s advanced digital electronics will streamline the way you monitor and control your process.

Process Connections - Male NPT
- 1/2"
- 3/4"
- 1"
- 1-1/4"
- 1-1/2"
- 2"
Adjustable Set Point Range
- 0 - 254 feet/s
- 0 - 77 meters/s
Insertion 'U' Lengths
- 1.2" (3.0 cm)
- 2" (5.0 cm)
- 3" (7.5 cm)
- 4" (10.1 cm)
- 6" (15.2 cm)
- 9" (22.8 cm)
- 12" (30.4 cm)
- 18" (45.7 cm)
- Custom Lengths from 2.5" to 120" (6.0 cm to 305 cm) by 1/2" (1 cm) increments
Input/Supply Power
- 12-24 Vdc & 120-240 Vac, 50-60 Hz
Operating Pressure - Maximum
- CSA - Canadian Standards Association
  - psi 3,480
  - kPa 24,000
  - bar 240
- CRN - Canadian Registration Number 0F22124.2C for 316/316L Stainless Steel
  - psi 1,990
  - kPa 13,721
  - bar 137.2
Temperature Range - Sensor
- -55° to 200° C
- -67° to 392° F
Local Enclosure
- Aluminum Flameproof
- 1" Female NPT
Local Enclosure Cover
- Blind or Glass Lens
- Flameproof
Wetted Materials
- 316/316L Stainless Steel
- Titanium
- Hastelloy C-276
Outputs/Communications
- Two Independent Relays - SPDT
- 4-20 mA
- Modbus
- Rated 120 Vac max, 30 Vdc max, 4 A max
Approvals
- CSA
- CRN
- Single Seal
- NACE
- ASME BPVC Sec. VIII Div. 1
- NEMA 4, 4X, 6P, IP65/67

Features

Detects minimum flow and the presence and absence of flow
Temperature compensation to provide repeatable alarm under varying process temperatures
Continuous diagnostics detect sensor fault
Non-linear mA output signal can be used for trending, diagnostics, repeatable flow and level indication
Simple calibration and installation
Excellent low-flow sensitivity
Window to view alarm status
Integral or remote electronics
NACE construction

Specifications

Brand

Kayden Instruments

Applications

Flow
Interface
Level

Principle of Operation

Thermal, Calorimetric

Sensor, Probe Style

Insertion Threaded

NPT Connection

1” NPT Male
1/2” NPT Male
1-1/2” NPT Male
1-1/4” NPT Male
2” NPT Male
3/4” NPT Male

Insertion 'U' Length

Custom Lengths from 2.5” to 120” (in 1/2” increments)
Custom Lengths from 6.4 cm to 305 cm (in 1 cm increments)
1.2” (3 cm)
12” (30 cm)
18” (46 cm)
2” (5 cm)
3” (7.5 cm)
4” (10.1 cm)
6” (15.2 cm)
9” (23 cm)

Wetted Materials

316, 316L Stainless Steel
Hastelloy C-276
Titanium

Operating Pressure - Sensor

CRN - All Process Connections: Max. Working Pressure: 1990 psi (13.72 MPa), Material: 316/316L Stainless Steel
CRN - Canadian Registration Number: 0F22124.2C
CSA - All Process Connections: Max. Working Pressure: 3481 psi (24 MPa)

Operating Temperature - Sensor

-55° to 200° C
-67° to 392° F

Sensor Construction

All-Welded Construction

Operating Temperature - Electronics

-55° to 65° C
-67° to 149° F

Switch Point Range

Air & 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

Accuracy

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

Switch Type

SPDT Sealed Relay Contacts Rated @ 4 Amps Resistive 230 Vac or 30 Vdc, Max.

Input Power

12-24 Vdc, 120-240 Vac, 50/60 Hz
Power Consumption: 6 Watts Max. Fully Configured
Universal Power Input

Output

4-20 mA (Thermal Signal, Scaleable) 120 Vac, Max.

Communication

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

Approvals & Certifications

CRN - 316, 316L Stainless Steel - Canadian Registration Number 0F22124.2C: MWP 1990 psi, 13,720 kPa, 137 bar
CSA - Local (Sensor) Enclosure Flameproof: Class I, Div. 1, Groups B, C, D, Ex d IIB + H₂ AEx d IIB + H₂ (Class I, Zone 1, Group IIB + H₂) Temperature Code: T3 Enclosure Typical 4, IP55 Single Seal Approved Per ANSI/ISA 12.27.01-2003
CSA - Remote Electronics Enclosure - Optional Flameproof: Class I, Groups B, C, D, Ex d IIB + H₂ AEx d IIB + H₂ (Class I, Zone 1, Groups IIB + H₂) Temperature Code: T3

Electronics - Standard Features

*Configurable only 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 & Constant Display of Operation (Flow/Level)
Start-Up Bypass Timer
Temperature Compensation
Temperature Mode*: Process Temperature may be displayed/graphed in Flow/Level Mode

Remote Control & Monitoring Software

Adjust Relay Modes
Adjust Set Points 1 & 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

Environmental Protection

IP55
IP67
NEMA 4X

Local Enclosure Conduit Connection

1” NPT Female Conduit Connection

Local Enclosure & Cover Material

Copper-Free Aluminum (Does Not Exceed 0.4 % Copper)

Local Enclosure Cover

Buna-N O-Ring on Cover
Blind Cover - Flameproof
Glass Lens Cover - Flameproof

Local Enclosure & Cover Finish

Powder-Coated Polyester TGIC

Remote Electronics Enclosure Cover

Glass Lens Cover - Flameproof

Remote Electronics Enclosure & Cover Finish

Powder-Coated Polyester TGIC

Storage Temperature

Store in a clean & dry environment between -30° & 60° C (-22° & 140° F)

Media - A few examples

Air and Gases
- Sour Gas
- Sweet Gas
Liquids
- Oils
- Turpentine
- Water
Slurries
- Pulp

Process Media Applications

Flow

Ammonia Storage
Biogas Flow
Catalysis Vessels
Chemical Injection & Additive Flow Monitoring
Chemical Reactors
Chlor-alkali Processes
Compressors
Condensers
Cooling Water
Deionization Tanks
Digester Gas Flow
Distillation Columns
Drain Line Flow
Emergency Eye Wash & Shower Stations
Fermentation Vessels
Flare Gas Monitoring
Flare Knock-out Drums
Flow Monitoring & Verification
Heat Exchangers
Heat Recovery Steam Generator (HRSG) - Power & Utilities
High Pressure Flows
Leak Detection
Lube Oil Systems
Monitoring Purge Air Flow
Natural Gas to Boilers
Oil Well System Testing
Pumps
Reboilers
Refinery Flow Applications
Relief Valve & Rupture Disk Flow Monitoring
Remote Indication of Flow via Analog Output & Digital Communications
Pump Protection - Dry Alarm
Safety Spray Nozzle Monitoring
Tank Blanketing
Tank Overflow Protection
Tanker Loading & Unloading
Water & Wastewater
Vaporizers
Vent Monitoring

Level

Biogas Dehydration
Blending Operations
Carbon Slurry Level
Compressor Scrubber
Compressor Waste Liquid
Condensate Receiver Tanks
Cooling Tower Basins
Crude Desalting
Crude Dehydration
Deionization Tanks
Digester Blow Tanks
Free Water Knock-out Tanks - High, Low and Interface Level
Geothermal - Degasser Tanks
Geothermal - Steam & Brine Separators
Leak Detection (Accumulation Reservoir)
Lime Slurry Level
Mixing & Blending Systems
Oil Separators & Treaters - High, Low & Interface Level
Production Fluid Storage
Pulp Bleaching Towers
Pulp Digesters
Pulp Storage
Pulp Washing Systems
Sampler Systems
Sand Separators
Scrubber Vessels
Storage Tanks
Sumps - All Types of fluids: Water, Oil, etc.
Surge Tanks
Tank Overflow
Turpentine Recovery
Vapor & Liquid Separation
Vapor Recovery

Interface

Crude Desalting
Interface Control in Separation Vessels
Interface Detection
Interface Control & Level Detection in Settling Vessels
Liquid-Liquid Extraction - LLX

Media

Liquids, Air & Gases
Slurries
Corrosive Liquids

Areas

Flameproof, Hazardous & General-Purpose Areas

IDEAL PROCESS CONDITIONS FOR FLOW

Liquids, Air, Gases, Slurries & Emulsion

Consistent Process Composition & Temperature
Sufficient Straight Run Flow Profile (minimizes turbulence)
Recommended Minimum of 5 Pipe Diameters from any Disturbance

Air & Gas

Clean and Dry

UNDESIRABLE PROCESS CONDITIONS FOR FLOW

Liquids, Air, Gases, Slurries & Emulsion

Inconsistent Process Composition or Temperature
Insufficient Straight Run
Aerated Fluids
Turbulence

Air & Gas

Wet or Saturated Air & Gas

Solids

Dry granulated processes are NOT good candidates for thermal switches

Kayden's CLASSIC 800 Series thermal flow, level, and interface switches and transmitters detect and monitor the flow rate or level/interface of a liquid or gas in a system based on the principle of thermal dispersion or thermal differential.

The CLASSIC 800 Series operates by measuring the amount of heat carried away by the process media as it moves past a heated temperature sensor, compared to a reference sensor that measures the ambient temperature of the process media. The difference in temperature between these two sensors is used to determine the flow rate, interface, or point-level condition.

Kayden calorimetric flow and level switches, also referred to as thermal flow monitors or level monitors function as follows:

Heating Element

The thermal switch has a heating element (or sensor) that is warmed to a certain temperature above the process media's temperature.

Temperature Sensors

Alongside the heating element, the device includes temperature sensors. One sensor measures the temperature of the heated element, while another measures the ambient temperature of the process media.

Flow Detection

When there is no flow or the flow is below a certain threshold, the temperature differential between the heated sensor and the ambient process media is more significant. As the flow rate increases, the process media carries away more heat from the heated sensor, reducing the temperature difference between the heated element and the reference element.

Level Detection

When the level of the process media rises and comes into contact with the heated probe, the probe cools down due to the increased heat dissipation caused by the cooler process media. Conversely, when the level drops and the probe is exposed to air, the probe's temperature rises because air's thermal conductivity is lower, and it dissipates less heat.

Signal Output

The switch translates the temperature difference into an electrical signal that can trigger an alarm, activate a relay, or send a signal to a control system, indicating whether the flow rate is above or below a preset threshold.

Thermal flow and level switches are known for their simplicity, reliability, and the ability to work without moving parts, which minimizes maintenance and the risk of mechanical failure.

Kayden's thermal switches are highly versatile and can be used in various applications, including cooling circuits, pump protection (to ensure there is flow in a system and prevent dry running), and process control in industries such as chemical manufacturing, pharmaceuticals, and food and beverage production.

Thermal level switches can be used for level detection in a wide range of applications, including overfill protection, and ensuring proper filling or emptying of tanks and containers. These monitors are suitable for use with various materials, including liquids and slurries, and can operate in challenging conditions, such as high pressure and temperature environments.

Kayden's thermal dispersion flow, level, and interface sensing technology provides accurate results to achieve highly reliable and repeatable setpoint detection in a wide range of demanding applications, all while providing a long service life.

Kayden CLASSIC 810 Thermal Flow, Level, Interface Switch & Transmitter

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CLASSIC® 810

Specifications

Specifications

Brand

Applications

Principle of Operation

Sensor, Probe Style

NPT Connection

Insertion 'U' Length

Wetted Materials

Operating Pressure - Sensor

Operating Temperature - Sensor

Sensor Construction

Operating Temperature - Electronics

Switch Point Range

Response Time

Accuracy

Switch Type

Input Power

Output

Communication

Approvals & Certifications

Electronics - Standard Features

Remote Control & Monitoring Software

Environmental Protection

Local Enclosure Conduit Connection

Local Enclosure & Cover Material

Local Enclosure Cover

Local Enclosure & Cover Finish

Remote Electronics Enclosure Cover

Remote Electronics Enclosure & Cover Finish

Storage Temperature

Applications

Operating Principle

Documentation

Documentation

Data Sheets

Product Manuals

Application Considerations

Application Notes

Catalogs

Certifications & Approvals

Outline Drawings

Software

Wiring Diagrams

Q & A