Gas Analyzer and Sonic Anemometer Mounting Hardware

This document describes mounting hardware that is used to install a sonic anemometer and the LI-7500A/RS/DS, LI-7200/RS, and LI-7700 gas analyzers LI-COR eddy covariance system. A typical installation is to a 3.3 cm (1.315 inch) outside diameter (OD) cross arm. Dimensions given refer to Iron Pipe Size (IPS) standards and will differ from the measured dimensions.

Description		Part Number
Crossover Fitting; ¾" × 1" IPS; Pipe OD: 26 mm (1.05") × 33 mm (1.315")		7900-342
Crossover Fitting; 1" × 1" IPS; Pipe OD: 26 mm (1.05") × 33 mm (1.315")		7900-346
Swivel Mount; ¾" IPS; Pipe OD: 26 mm (1.05").		7900-344
56 cm Riser Bar; ¾" IPS, 56 cm (22") Long; OD: 26 mm (1.05")		9879-046
45 cm Riser Bar; 1" IPS, 45 cm (18") Long; OD: 33 mm (1.315")		9879-095

Set screws should be tightened to 22 N•m (16 ft•lbs). If no torque wrench is available, tighten each set screw until it contacts the pipe, then one more full revolution for aluminum pipe, or ¼ revolution for stainless steel. Use a 5/32" hex key for all the fittings except the ¾" × 1" crossover fitting (7900-342), which uses a 3/16" hex key.

Mounting kits

Mounting hardware kits are available for gas analyzers and a variety of sonic anemometers.

Gas analyzer mounting kit

The gas analyzer mounting kit is for mounting an LI-7500A/RS/DS to a tripod cross-arm. For the LI-7200/RS, use the mounting kit plus one 56 cm riser bar (9879-046) and crossover fitting (7900-346) to support the intake tube.

Gill WindMaster/Pro anemometer mounting kit

To mount the WindMaster/Pro and R3, use a ¾" × 1" cross-over fitting (7900-342) and anemometer mounting post (900-11242). The mounting post is included with WindMaster/Pro anemometers purchased from LI-COR. The cross-over fitting is available seperately.

Description	Quantity	Part Number
WindMaster/Pro Mounting Post	1	900-11242
Crossover Fitting (¾" × 1")	1	7900-342

RM Young 81000x anemometer mounting kit

Mount the RM Young 81000, 81000V, 81000RE, or 81000VRE sonic anemometer with the RM Young mounting kit (7900-332).

Table 1‑2. The RM Young mounting kit and components.

Description	Quantity	Part Number
Crossover Fitting (1" × 1")	1	7900-346
45 cm Riser Bar (1" IPS)	1	9879-095

Metek MultiPath Class A anemometer mounting kit

Mount the Metek Class A anemometer with the Metek mounting kit (7900-336).

Table 1‑3. The Metek Class A mounting kit and components.

Description	Quantity	Part Number
Crossover Fitting (1" × 1")	1	259-17893
45 cm Riser Bar (1" IPS)	1	9879-095
Cross-arm Plate	1	9879-020
Cross-arm Brackets	2	9879-043
Cross-arm Hardware Pack	1	9979-018

Metek MultiPath Cage anemometer mounting kit

Mount the Metek Cage anemometer with one 1" × 1" crossover fitting (7900-346).