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  • Description

Multi-function, dual set-point wind speed alarm and controller

The MAC3 Wind Speed Alarm provides operators with a wealth of features and an unprecedented level of control.

It is highly accurate, rugged and an ideal solution for managing commercial equipment by collecting and monitoring conditions and providing timely alerts to keep you abreast of wind speeds that could cause safety concerns for people and equipment in nearly endless applications.

Incorporating Maximum's renowned #400 anemometer, the MAC3 can be configured for simultaneous use with dual sensors to monitor two separate locations.

The MAC3 integrates time delay and latching capabilities to prevent equipment damage due to frequent on/off power cycling, and has a large, easy-to-read green on black LCD panel for viewing wind speed conditions, settings and user-defined information such as wind speed averages, peak gusts and other key metrics.

The instrument can be password protected to prevent unintended changes to settings, and the two (2) 5 amp relays can provide on/off control for external devices such as outdoor venue equipment, agriculture devices, municipal fountains, construction equipment and lifts, cranes, security systems, awnings and gate controllers, outdoor advertising and an incredibly wide variety of other devices that can be affected or become unsafe in windy conditions.

The Maximum MAC3 controller and anemometer are weather-tight to the IP65 standard and rated for use from -40 to 158 degrees F (-40 to 70 degrees C).

Operating in 12- and 24-Volt DC power source environments, the controller measures 5.08 inches wide x 7.39 inches high x 2.26 inches deep (129.0 mm x 187.8 mm x 57.4 mm).

MAC3 is shipped complete with one (1) #400 wind speed sensor, 100' sensor cable, 14" straight, stainless steel stub-mast and mast mounting hardware.


  • LED digital readout with 5/8" digits
  • Dual set points (2 alarms) 0-99 MPH
  • Warning level: yellow
  • Control level: red, with 85dB SPL (piezo buzzer)
  • Can be set to monitor high or low wind speeds
  • 2 Relay outputs to operate external devices
  • One SPDT relay for each set point
  • Non micro-processor circuit to minimize occurrence of latch-up
  • NEMA Type 4X weather-tight polycarbonate case with clear cover
  • Power and sensor cables enter through bottom
  • Internal screw apertures for surface mounting


  • Measurement Range: 0 255 MPH
  • Accuracy: +/- 2 MPH of input and +/- 1 digit
  • Sample Rate: 1.7 seconds
  • Sound: 85 dB(A)/10cm (min.) @ 3.1kHz, -40 to 70°C
  • Relays: Two SPDT relays (rated at 5A at 30VDC)
  • Dimensions: 7.39" height x 5.08" width x 2.26" depth
  • Weight: 1.58lbs.
  • Operating Temperature: -40° to +158°F (-40° to +70°C)
  • Power: 12VDC @ 150mA; 24VDC @ 75mA
  • Current Draw: 120mA Max with heater off, 970mA Max with heater on
  • Sensor: 3-Cup #400 anemometer
  • Viewing Display: 1.375" x 2.625"

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