UT20 20 ft Universal Tower with Adjustable Mast


The UT20 is a durable instrument tower that can be used for a variety of applications. The UT20 tower provides a sturdy mount for many meteorological monitoring applications—especially fire weather stations, where a 6 m (20 ft) measurement height for wind sensors is standard. It also holds antennas, solar panels, environmental enclosures, radiation shields, and crossarms. It is a versatile instrument mount: many of the same sensor mounts that are used with either our tripods or other towers can be used with the UT20.

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Benefits and Features

  • Sturdy, long-term instrument mount


Detailed Description

The UT20 tower includes two 3-m (10 ft) sections, one extendable mast, and two cable-tie kits. It has a 1.5-m (5 ft) length and a 3.175-cm (1.25 in.) outer diameter [swagged to 2.5 cm (1 in.) OD]. The 3-m sections are constructed from 2.5-cm (1 in.) OD aluminum tubing.

Top 3 m Section

This section's width is 33.3 cm (13.1 in) on a side (center of tubing to center of tubing).

Bottom 3 m Section

This section's width is 43.2 cm (17 in) on a side (center of tubing to center of tubing).

Mounting Base, Grounding Kit, and Guying Kit
This tower requires a mounting base (B18 or RFM18) and grounding kit (UTGND). Campbell Scientific also recommends guying the UT20 with our UTGUY Guy Kit. See Ordering Info on web page for more information.


Material Hardened drawn 6063-T832 aluminum
Guyed Tower Area Requirements ~3.5 m (11.5 ft) radius
Required Concrete Pad Dimensions 91 x 91 x 122 cm (36 x 36 x 48 in.) for B18 Concrete Mounting Base

Concrete pad requirements assume heavy soil; light, shifting, or sandy soils require a larger concrete pad.
Pipe Outer Diameter
  • 2.5 cm (1 in.) for vertical pipe
  • 0.953 cm (0.375 in.) for cross support pipe
Crossarm Measurement Height 6 m (20 ft)
Height 6.1 m (20 ft)
Weight 19.1 kg (42 lb)

Maximum Wind Load Recommendation

-NOTE- Wind load endurance is affected by quality of anchoring and installation; guy wire tension; soil type; guy angle; and number, type, and location of instruments fastened to the tower.

Wind load recommendation assumes proper installation, proper anchoring, adequate soil, and total instrument projected area of less than 0.19 m2 (2 ft2).

For the RFM18 base, the wind load recommendation also assumes that the UTGUY’s turnbuckles are preloaded just enough to equalize tension and that the tower is guyed at a 60 degree angle relative to the ground (maximum).
B18 Base (unguyed) 177 km/h (110 mph)
RFM18 Base (with UTGUY) 177 km/h (110 mph)


Enclosure Brackets

The “-TM” mount option for our environmental enclosures is used to attach our enclosures to a UT20 tower. An enclosure ordered with the “-TM” option will be shipped with a three-piece bracket mounted to the top of the enclosure and an identical three-piece bracket mounted to the bottom of the enclosure. This mounting bracket option uses the same three-piece brackets as the "-MM" option, except the pieces are rearranged so that the flanges are on the side of the bracket instead of in the middle. The distance between the centers of each flange needs to be 17”.

Enclosures with the "-TM" option are shipped configured for the UT10 tower. UT20 customers will need to: (1) remove the bolts attaching the bracket to the enclosure, (2) slide out the flange sections so that the distance between the center of each flange is 17", and (3) reattach the bracket to the enclosure using the original bolts.


CM202 CM202SS CM203 CM204 CM204SS CM206 019ALU UT018-5

Frequently Asked Questions

Number of FAQs related to UT20: 1

  1. In applications involving a tower and either strong winds or the need to attach a lot of gear to a crossarm, Campbell Scientific recommends using a longer crossarm with a second CM210 Crossarm-to-Pole Bracket. (One CM210 ships with each CM202, C204, or CM206 crossarm.) Secure the crossarm to two points on the tower to add stability and rigidity to the crossarm. The crossarm can be shifted in a foot (the distance between the vertical supports on the tower), or the crossarm can be centered on the tower.