CLASSIC 812 Flanged Switch and Transmitter

The CLASSIC 812 Flow, Level, and Interface Switch and Transmitter features a precision welded, highly accurate stainless steel sensor. It’s ideal for liquids, gases, and slurries in clean or dirty processes. In addition, 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 also feature a rugged flameproof enclosure with blind or lens cover options. Its advanced digital electronics will revolutionize the way you monitor and control your process.

• easy setup; no jumpers or trim pots
• continuous self-test diagnostics with fault indicator
• temperature compensation
• universal power 12-24 VDC and 115-230 VAC standard
• two SPDT relays – independently adjustable
• 4-20 mA analog output
• smart heater function for power economy and increased heater life
• start-up bypass timer (for pump control)

Specifications of the Kayden CLASSIC 812 Switch and Transmitter

Process Connections

• raised face
• RTJ flange

Adjustable Set Point Range

• 0 to 254 feet/second (0 to 77 meters/second)

Insertion ‘U’ Lengths

• minimum 2.5 inches (6.0 cm) to maximum 120 inches (305 cm)
• custom lengths available by 1/2″ (1 cm) increments

Input / Supply Power for the CLASSIC 812 Switch and Transmitter

• 12-24 VDC
• 115-230 VAC
• 50-60 Hz

Operating Pressure (Maximum)

• per flange rating, ASME B16.5

Temperature Range (Sensor)

• -50 to 392˚F (-45 to 200˚C)

Local Enclosure

• flameproof aluminum
• 1″ FNPT conduit connection

Conduit Connection Cover

• flameproof: blind cover or glass lens

Wetted Materials

• 316/316L stainless steel
• other materials available

Outputs and Communications for the CLASSIC 812

• two independent relays (SPDT)
• 4-20 mA
• Modbus
• rated:
  • 120 Vac max
  • 30 Vdc max
  • 4A max

Display Panel Indicators

• relay 1 and 2
• set point 1 and 2
• fault alarm
• run mode
• start-up bypass timer (for pump control)
• LED bar graph for flow rate, level, or interface indication

Configuration Mode Features

• adjustable sensitivity
• zero and span adjustment
• Modbus addressable

Approvals

• FM
• CSA
• CRN
• Single Seal
• NACE
• NEMA 4X

Applications

Flow

• pump protection – dry alarm
• leak detection
• flow monitoring and verification
• tank overflow protection
• flare gas monitoring
• monitoring purge air flow
• lube oil systems
• vent monitoring
• natural gas to boilers
• emergency eye wash and shower stations
• drain line flow
• high pressure flows
• tanker loading and unloading
• relief valve and rupture disk flow monitoring
• remote indication of flow via analog and digital output communications
• chemical injection / additive flow monitoring

Level

• storage tanks
• oil separators and 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

• control in separation vessels
• detection
• control and level detection in settling vessels

Media

• liquids, air, and gases
• hazardous area and general-purpose areas
• slurries
• corrosive liquids

Process Conditions for the CLASSIC 812 Flow, Level, and Interface Switch and Transmitter