KMT Mass Flowmeter

Brand: KOBOLD Instruments, Inc.

The KOBOLD flowmeter series KMT, based on the measurement principle of thermal mass flow, is ideally suited for the measurement of flow of compressed air and gases in pipes with sizes from DN 15 to DN 700.

Measurement of for instance the usage of compressed air, nitrogen, CO2 or other non-corrosive gases. The KMT is setting new standards in terms of measurement accuracy and reproducibility thanks to its application specific adjustment during production.

This flow meter is adjusted under a pressure of 7 bar (abs) (DN 15 to DN 50) or 9 bar (abs) (DN 65 to DN 700). Adjusting the device specifically for its application has the advantage of keeping the actual flow speed in the pipeline low even with very large flow quantities.

Thanks to the more stable flow profile, this low flow speed facilitates a much better degree of reproducibility and accuracy than if the device were adjusted conventionally under normal pressure, as flow speeds up to 200 Nm/s can often no longer be controlled under conventional adjustment pressures.

The core design of the flow meter is based on the hot film sensor element, which is produced using the most modern thin film technology and has already proven itself time and time again in the automotive industry. This flow sensor features excellent long-term stability, a fast response time and an extremely high degree of reliability. Two outputs are available, for further processing of the measurement data.

Depending on the application, these outputs can be configured as Analog (current or voltage), switch output or as pulse output for the measurement of the consumption.

The KMT has an integrated counter for consumption. The consumed amount is shown on the display and the saved value is not lost even after power outage. The availability of the consumption amount as a free configurable pulse output is another helpful feature.

Specifications

Accuracy

  • ± 0.7° C (± 1.26° F) at 20° C (68° F)
  • ± 1.5 % of Reading
  • 0.8 % of Full Scale

Ambient Temperature Range

  • -20° to 60° C (-4° to 140° F)

Applications

  • Compressed Air Counter
  • Mass Flow Measurement of Industrial Gases
  • Measurement of Consumption of Compressed Air

Ball Material

  • Brass

BSP Connection

  • 1/2" BSPT Male
  • 1" BSPP Female
  • 1/2" BSPP Female
  • 1-1/2" BSPP Female
  • 1-1/4" BSPP Female
  • 2" BSPP Female
  • 3/4" BSPP Female

Cable Entry

  • M16 × 1.5 (Electrical Connection)

Configuration

  • USB

Consumption

  • Maximum

Display

  • 2 Line LCD -Backlighting

Electromagnetic Interference Effect

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

Enclosure, Body Material

  • AlSi3Cu - Metal

Environmental Protection

  • IP65
  • NEMA 4

Flow Rate

  • Air: 0.32 to 1400 Nm³/hour - Standardised Volumetric Flow
  • Gas: 0.5 to 200 Nm/sec - Standardised Flow (Air, Nitrogen, CO₂, Argon, Helium & Oxygen)

Frequency

  • 0.5 Samples Per second

Humidity

  • Non-Condensing

Input

  • 14.2-16 Vdc
  • 2-Wire
  • 4-20 mA

Media

  • Compressed Air
  • Non-Corrosive Gases

Nominal Pressure

  • psi: 232.1 (bar: 16, kPa: 1,600)

NPT Connection

  • 1" NPT Female
  • 1-1/2" NPT Female
  • 2" NPT Female
  • 3/4" NPT Female

Output

  • 0-10 V, Maximum
  • 0-20 mA, 3-Wire - Analog Output Current
  • 4-20 mA RL< 500 ohms (3-Wire) - Analog Output Current
  • Pulse Output - Totaliser, Pulse Length 0.02 to 2 seconds
  • Switching Capacity: 500 mA

Pipe Connection

  • 1" Pipe (DN 25)
  • 1/2" Pipe (DN 15)
  • 10" Pipe (DN 250)
  • 1-1/2" Pipe (DN 40)
  • 1-1/4" Pipe (DN 32)
  • 12" Pipe (DN 300)
  • 14" Pipe (DN 350)
  • 16" Pipe (DN 400)
  • 2" Pipe (DN 50)
  • 20" Pipe (DN 500)
  • 2-1/2" Pipe (DN 65)
  • 24" Pipe (DN 600)
  • 28" Pipe (DN 700)
  • 3" Pipe (DN 80)
  • 3/4" Pipe (DN 20)
  • 4" Pipe (DN 100)
  • 5" Pipe (DN 125)
  • 6" Pipe (DN 150)
  • 8" Pipe (DN 200)

Power Requirement

  • 18-30 Vac/dc

Pressure Type

  • Absolute

Process Temperature

  • -20° to 80° C (32° to 176° F)

Response Time

  • < 1 second

Sensor / Probe Material

  • Stainless Steel

Sensor / Probe Material

  • Stainless Steel / Glass - Sensor Head

Storage Temperature

  • -10° to 60° C (14° to 140° F)

Supply Pressure Effect

Temperature Effect

  • Temprature Coefficient - ± 0.1 % of Reading/°C

Temperature Range

  • Maximum

Documentation

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