AFK-E Humidity/Temperature Measuring Instrument

Brand: KOBOLD Instruments, Inc.

The KOBOLD measuring instruments AFK-E have been designed for the accurate measurement of humidity and temperature in industrial applications. They allow measurements in the range 0 to 100% RH and between -40° to 180° C.

A capacitive humidity sensor element with excellent long term stability, minimum hysteresis and high chemical resistance forms the basis for this highly accurate transmitter series.

The values for humidity and temperature are displayed on two Analog outputs. A scalable and selectable current signal in the range 4-20 mA or any voltage signal between 0-10 V are available for selection.

This flexibility is achieved with cutting-edge microprocessor technology, whereby the scaling and selection of the output signal is carried out with a user-friendly graphic interface running under MS Windows.

The factory setting can thus be changed easily on site by the user. In addition to measured values for humidity and temperature, the transmitters supplies.

Specifications

Accuracy

  • ± (1.3 + 0.3 % of Reading) % Relative Humidity at -15° to 40° C / 90 % Relative Humidity: (Including Hysteresis, Non-Linearity & Repeatability)

Applications

  • Air Conditioning Cabinets
  • Cheese Ageing Rooms
  • Fruit & Vegetables
  • Humidity of Clean Rooms
  • Medicines
  • Pasta & Noodles
  • Pharmaceutical Products
  • Storage Warehouses
  • Wood

Cable Length

  • 6.56 to 65.6 feet (2 to 20 metres)

Consumption

  • 40 mA at 24 Vdc/ac Typically - Current Consumption: 2 × Voltage Output
  • 80 mA Typically - Current Consumption: 2 × Current Output

Electrical Connectors

  • DIN EN 60751, Category A - Sensor
  • Screw Terminals - Maximum

Enclosure, Body Material

  • Aluminum - Fixed Wall Mounting Integrated

Environmental Protection

  • IP65

Humidity

  • 0 to 100 % Relative Humidity

Loop Resistance

  • < 500 ohms - Analog Outputs

Operating Temperature

  • -40° to 60° C (-40° to 140° F) - without Display

Operating Temperature - Display

  • -20° to 50° C (-4° to 122° F)

Operating Temperature - Sensor

  • -40° to 180° C (-40° to 356° F)

Output

  • < 1 mA - Analog Outputs
  • 0-10 V - Analog Outputs
  • 0-20 mA - Analog Outputs
  • 0-5 V - Analog Outputs
  • 15 mA Typically - with Plug-In Power Supply Unit: 2 × Voltage & Current Output
  • 4-20 mA - Analog Outputs

Power Requirement

  • 100-240 Vac - Optional Plug-In Power Supply Unit

Response Time

  • < 15 seconds - with Metal Screen: T 10/90 at 20° C
  • < 6 seconds - without Filter: T 10/90 at 20° C
  • 14 seconds - with PTFE Filter: T 10/90 at 20° C
  • 30 seconds - with Stainless Steel Sintered Filter: T 10/90 at 20° C

RFI/EMI Protection

  • EN 61326-1 - Industrial Environment
  • EN 61326-2-3

Sensor / Probe Type

  • Pt 1000 - Sensor: (DIN EN 60751, Category A)

Supply Voltage

  • 12-30 Vac - SELV
  • 8-35 Vdc - SELV

Temperature Effect

  • ± 0.01 % Relative Humidity/°C - Temperature Dependence of Electronics
  • 0.005° C/°C - Temperature Dependence of Electronics

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