For irreversible exposure that instruments of the non-electronic regional readout type, it is advised that they it is in housed in a suitable instrument shelter. An instance of a instrument shelter, pictured below, dwellings a maximum/minimum thermometer and also supports a 3-inch diameter cylindrical rain gauge top top the earlier side the the unit. That is made totally of wood and also is attached v screws, nails, a couple of corner braces, and 2 hinges. It additionally has locking hardware and also is fitted v a locking cable to aid secure the sanctuary outdoors.

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It is vital that tools inside the unit have adequate natural ventilation. The tools should be in ~ a level of 4 to 4.5 feet over the ground. The sanctuary door should confront north so the sunlight will not straight shine top top the thermometer as soon as the door is opened. Developed to the specifications below from new materials, the estimated price of the shelter and security hardware is $30 excluding labor and also instruments. Max/min thermometers expense $15-25, and also rain gauges, $8-$12.


Suggested dimensions/specifications:


11.25" deep x15.00" large x15.00" tall in earlier x17.50" high in front

Double sloping roof through airflow in in between roof panels. Roof top, 16"x 23.5".

Floor slats space spaced 0.5" come 1" for ventilation. Louvered side panels and door room preferred. But 1" thick panels drilled with number of 1" feet slanted down toward the exterior are adequate.

The ago panel should be solid. A T-shaped strut have to be mounted near the center inside to hang the thermometer.

All surfaces need to receive 3 coats of white paint.

Exposure and Location of InstrumentsCompiled through Phil Duncan and Rod Gonski

The following guidelines for appropriate exposure and also location that instruments are because that the best arrangement. Her individual case may not allow you come follow every the rules. Yet please save in mind the the thermometers must be situated in the shade, and try to situate them far from buildings or other warmth sources. Perform the best you can.


Thermometers must be shielded indigenous the sun, rain, snow and other resources of light, heat, or cold the can reason erroneous readings. If one instrument shelter is used, it should be design to enable the best possible cost-free flow of waiting while offering protection from heat, precipitation and also light. A shady location on the northeast side of the school is a desired site.

The thermometer should be 4.5 to 6 feet over the ground and in a grassy location. (You may need to save a action stool adjacent for short people since readings are taken in ~ eye level to minimization parallax error.) A flat, open up clearing is desirable so that the thermometer is easily ventilated by the circulation of air. Continue to be at the very least 100 feet away from concrete or paved surfaces. Stop balconies, patios, fastened porches, and also beneath eaves.

Precipitation Gauges

The exposure of a precipitation gauge is essential for obtaining specific measurements. Prevent obstructions such together trees or structures that might deflect the fall of precipitation and cause turbulence. The gauge should be over level ground and also at the very least twice the distance away native trees and also buildings together they space tall. Because that example, the gauge need to be at the very least 40 feet far from a 2-story (20-foot tall) building.

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Though a precipitation gauge must be situated away from obstacles, it should not be in an elevated website or in locations of channeled winds (ie in a passageway in between buildings). As a general rule, the windier the exposure is, the greater the precipitation measure up error will certainly be. Also, to stop collecting earlier splatter, the height of the gauge need to be at least three feet above the ground.