Anemometer Kit Assembly Instructions

Parts List

Before you start construction of your anemometer please make sure you have all of the parts you need. If you find any part missing please contact APRS World and we will mail the missing part to you as soon as possible.

All Kits

Quantity Description
3 Aluminum wind cups, 2.5" (63.5mm) diameter (weight matched set)
1 Magnetic reed switch 1.5" (38.1mm) long, 5/16"-24 with hex nuts
2 Magnets, 1/2" (12.7mm) diameter (epoxied into 2" PVC cap)
1 Nylon Spacer, 1/2" (12.7mm) OD, 0.25" (6.35mm) ID, 1" (25.4mm) long
1 PVC cap, 2" schedule 40 pipe (precision drilled and tapped)
1 PVC cap, 1.5" schedule 40 pipe (precision drilled)
12 #8 nylon washers (UV resistant)
1 Ball bearing, 1/4" (6.35mm) ID, 3/4" (19mm) OD, shielded (epoxied into 1.5" PVC cap)
1 1/4"-20 cap screw (bolt), 1.75" long, stainless steel
1 1/4"-20 acorn nut, stainless steel
2 Custom spacer (washer), 0.355" OD, 0.260" ID, 0.040" thick, stainless steel
3 #8-32 machine screw, 4" long, stainless steel
15 #8-32 hex nut, stainless steel
6 #8 internal tooth lock washer, stainless steel
1 Loctite #222 thread locker packet
1 RJ-45 connector board soldered to magnetic switch
2 #6-32 machine screw, 1/4" long
2 Spacer, #6-32 female, 1/4" Hex, 0.75" long, Aluminum (pre-pressed into 1/5" PVC cap)
1 PVC pipe, 1.5" trade size, 5" long

Recommended Tools

To make your kit assembly easier we recommend you have the following tools available:

Assembly Instructions

Build the rotating assembly:

If the wind cups are oriented on the 2" cap so that the cap rotates clockwise (when viewed from above) the tendency will be for the cap screw to tighten on the mounting bolt (rather than unscrewing). We recommend this orientation.

Install and adjust the rotating assembly:

Install the connector:

Sectional Drawing

Sectional assembly view