KOAMS Series

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KOAMS Series

Kele Outdoor Airflow Measuring Systems KOAMS Series

Kele Outdoor Airflow Measuring Systems


The Kele KOAMS Series outdoor airflow measuring system consists of multiple airflow elements, factory-mounted and pre-piped in a casing designed for flanged connection to ductwork, control dampers, louvers, etc. An optional inlet bell is available for plenum applications next paragraph. The integral signal processor utilizes state-of-the-art digital microprocessor technology with unequaled 24-bit A/D and 12-bit D/A signal conversion resolution and has twelve-point linearization capability. The KOAMS is capable of measuring down to 100 fpm and providing full scale operating ranges as low as 693 fpm. The signal processor accepts a temperature input signal for air density compensation for standard (scfm) or actual (acfm) airflow calculations.


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  • Accuracy of ±0.5% through the velocity range of 200 to 1,200 fpm and ±5% accuracy at 100 FPM
  • Multiple total and static pressure sensing ports to comply with ASHRAE Standard 111 for duct traversing
  • Not affected by condensation or moisture
  • Aerodynamically designed to resist fouling by airborne particulates
  • Factory mounted and pre-piped in a flanged duct section (casing)
  • Optional inlet bell for plenum applications
  • Airflow station can be operated in humidity ranges of 0 to 100% with no effect on the station
  • Full scale spans as low as 693 fpm (3.52 m/s) velocity
  • Excellent AD/DA resolution: 24-bit A/D and 12 bit D/A
  • Twelve point linearization and four point flow correction
  • Large back lit LCD for configuration and local indication of the measured process
  • Auto zeroing function
  • Temperature compensation for air density correction
  • NEMA 4 rated enclosure
  • Modbus communication
  • Certified LonWorks® or BACnet MS/TP® communication option
  • Temperature transmitter included
  • Models listed by case height (probes to be perpendicular to airflow)
  • Remote signal processor (4-20mA output)

Supply Voltage:20 to 28 VAC @ 6 VA; 20 to 28 VDC @ 250 mA

Accuracy:Within ±0.5% of actual flow through the range of 200 to 1,200 fpm, and ±5% at 100 fpm velocity, when installed in accordance with publlished recommendations

Signal Output:Jumper selectable 0-5 VDC, 0-10 VDC (1KΩ minimum), or 4-20 mA (500Ω maximum)

Relay Type:Optional high/low alarm: SPDT, 5A at 30 VAC/VDC, 10A at 120 VAC resistive load

Velocity Range:100 to 2,800 fpm

Communication:LonWorks®, BACnet MS/TP®, Modbus

Operating Temperature:Processor: 32° to 122℉ (0° to 50℃)

 :Station: up to 350℉ (177℃) continuous operation

Operating Humidity:Processor: 0 to 95% RH, non-condensing

 :Station: 0 to 100% RH

Materials Of Construction:Elements: 6063-T5 anodized aluminum

 :Casing: 16 ga. G90 galvanized steel (other materials available special order)

Enclosure Rating:NEMA 4X with proper connectors

Dimensions:Processor housing 6.7"H x 4.7"W x 2.7"D (16.9 x 11.9 x 6.9 cm)

Weight:Depends on size

Warranty:1 year