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Boom Extensions

Extend and retrofit NRG booms to meet your project’s needs with our boom extensions and adapter kits.

  • Boom Extensions

Configuration Options

All boom extensions and adapters are made of durable galvanized steel. Both stub mast options come with hose clamps for mounting on any tower or boom up to 203 mm (8”) in diameter.

Each Boom Extension that comes standard with our 2.4m (95”) Side Mount Booms can also be purchased separately. Extensions #5815 and #9342 are for mounting RNRG sensors, including the NRG 40C Anemometer, the NRG Class 1 Anemometer and the NRG 200P Wind Vane. Extensions #4475 and #9165 are for mounting the WindSensor P2546-OPR Anemometer. Each boom extension name includes the ratio between the diameter of the horizontal boom and the height the extension will position anemometer cups above the boom. For instance, “20D” indicates that the cups of a WindSensor P2546-OPR Anemometer will be positioned above the horizontal boom arm by an offset height that is 20 times the horizontal boom diameter when using a #9165 boom extension.

We offer a WindSensor Adapter Kit to retrofit standard NRG 60.5” Tubular Booms for mounting the WindSensor P2546-OPR Anemometer.

The Thies Adapter is a collar adapter that allows you to mount the Thies First Class Advanced Anemometer on any 2.54 cm (1”) diameter vertical pipe, such as NRG boom #4478 or any boom already fitted with a WindSensor boom extension.

The 16” Stub Mast is a straight stub mast that mounts vertically on our 2.87 m (113”) pipe booms to raise the sensor position 410 mm (16 inches) vertically. Compatible with all NRG anemometers and wind vanes.

The 13” Z Mast is an offset stub mast that mounts on our 2.87 m (113”) pipe booms to extend the sensor position 122 mm (4.8 inches) vertically and 239 mm (9.4 inches) horizontally. Compatible with all NRG anemometers and wind vanes.

  for 40C, 200P, NRG Class 1, 200M, 26.7D (#9342) for WindSensor, 20D (#9165) for 40C, 200P, NRG Class 1, 15D (#5815) for WindSensor, 15D (#4475) 1.53m (60.5") Tubular Boom (#4352) fits 25 mm (0.98") dia. Pipe (#9344) 16" Stub Mast (#1941) 13" Z Mast (#1942)
Description  
Boom type n/a n/a Boom extension Boom extension Adapter and brace kit Collar adapter straight stub mast for mounting standard NRG sensors offset boom for mounting standard NRG sensors
Applications n/a n/a For mounting NRG sensors onto 2.4m (95") NRG side mount booms For mounting WindSensor P2546-OPR or Thies First Class Advanced Anemometers onto 2.4 m (95") NRG side mount booms For mounting WindSensor P2546A onto 1.53 m (60.5 inches) NRG boom (item 3390) Mounting Thies First Class Anemometer onto vertical pipe masts with 25 mm (0.984") outer diameter wind resource assessment; for mounting one NRG #40 Anemometer or one NRG #200P Wind Direction Vane wind resource assessment; for mounting one NRG #40 Anemometer or one NRG #200P Wind Direction Vane
Sensor compatibility n/a n/a
  • NRG 40C Anemometer
  • NRG Class 1 Anemometer
  • 200PWind Direction Vane
  • WindSensor P2546-OPR Anemometer
  • Thies First Class Advanced Anemometer (must use one Thies Adapter, #9344)
WindSensor P2546-OPR Thies First Class Advanced Anemometer
  • NRG #40 Anemometer
  • NRG #200P Wind Direction Vane
  • NRG #40 Anemometer
  • NRG #200P Wind Direction Vane
Tower compatibility n/a n/a Any NRG TallTower with 2.4m (95") NRG side mount booms (#4214 or #4159) Any NRG TallTower with 2.4 m (95") NRG booms (#4214) NRG TallTowers with 1.53 m (60.5 inches) NRG boom (item 3390) only Any Tubular or Lattice tower that has booms with 25 mm (.984") diameter vertical pipe, such as NRG boom #4478 or any boom already fitted with a WindSensor Adapter Kit. any vertical mast up to 203 mm (8 inches) diameter any vertical mast up to 203 mm (8 inches) diameter
Installation  
Mounting n/a n/a Retrofits existing 2.4m (95") NRG side mount booms to enable mounting of NRG sensors Retrofits existing 95" NRG tubular boom (#4214) to enable first class anemometer mounting Can be used to retrofit existing 1.53 m (60.5 inches) NRG boom (item 3390) Can be used to retrofit any boom with 25 mm (.984") diameter vertical pipe, such as NRG boom #4478 or any boom already fitted with a WindSensor Adapter Kit.
  • stub clamps to tower or boom with supplied hose clamps
  • sensor mounts to boom with set screw and cotter pin
  • stub clamps to tower or boom with supplied hose clamps
  • sensor mounts to boom with set screw and cotter pin
Tools required n/a n/a 5/16" hex socket bit for drill, 3/8" open end wrench or socket driver, tape measure 5/16" hex socket bit for drill, 3/8" open end wrench or socket driver, tape measure 5/16 inch hex socket bit for drill, 3/8 inch open end wrench or socket driver, tape measure 3 mm allen wrench
  • 5/16 inch hex driver or flat blade (-) screwdriver for hose clamps
  • Phillips head (+) screwdriver to mount sensor
  • 5/16 inch hex driver or flat blade (-) screwdriver for hose clamps
  • Phillips head (+) screwdriver to mount sensor
Recommended for installation n/a n/a Battery operated drill with clutch Battery operated drill with clutch Battery operated drill with clutch n/a
  • electric drill for tightening hose clamps
  • sheet metal shears or similar for trimming hose clamps
  • electric drill for tightening hose clamps
  • sheet metal shears or similar for trimming hose clamps
Environmental  
Lifespan n/a n/a 2 years + n/a n/a n/a 2 years + 2 years +
Physical  
Weight n/a n/a n/a n/a n/a n/a 0.18 kg (0.4 pounds) 0.23 kg (0.5 pounds)
Overall boom length n/a n/a n/a n/a Ships in 188 cm (74 inches) box, support arms are 173 cm (68 inches) N/A. No vertical rise or boom extension. 406 mm (16") 343 mm (13.5 inches)
Boom diameter n/a n/a n/a n/a n/a n/a 13 mm (0.5 inches) 13 mm (0.5 inches)
Offset distance n/a n/a n/a n/a n/a n/a n/a Adds 330 mm (13") to the Offset Distance of the attached boom
Offset height n/a n/a 40C cup height above horizontal boom arm:
38.1cm (15.0")

200P wing height above horizontal boom arm:
39.4cm (15.5")
WindSensor cup height above horizontal boom arm:
38.1cm (15.0")

Thies cup height above horizontal boom arm:
38.6cm (15.2")
Adds 31.1 cm (12.25 inches) to standard boom mounting height None Adds 362 mm (14.25") to the Offset Height of the attached boom Adds 114 mm (4.5") to the Offset Height of the attached boom
Rod diameter n/a n/a n/a 3/4" tubing 13 mm (0.5 inches) tubing N/A n/a n/a
Materials  
Boom n/a n/a Galvanized steel tubing Galvanized steel tubing Galvanized steel support arms; stainless steel adapter stub Aluminum 13 mm (0.5 inch) galvanized steel tube 13 mm (0.5 inch) galvanized steel tube