- Moeller Instrument Co Sling Psychrometer Hygrometer Wet & Dry Leather Case
- Vintage
-
Preowned - tested and works - lock is stiff to open - slide lock to right to open/slide left to lock
- Double thermometer velvet lined case
- Meteorology history
- One thermometer is ordinary & one is a wet-bulb thermometer
- Measures relative humidity in the air
- Wet the wick-covered thermometer bulb, grab the instrument by its handle, sling it around in a circle over your head or in front of you for a minute or two, note the temperature difference between the wet and dry bulb thermometers, read a chart which converts the room temperature and difference to a relative humidity
- Attached metal rod
- Please view all photos for details as they are part of the description
- Previously-owned items naturally have slight wear or imperfections
- Preowned clothing washed with unscented/hypoallergenic detergent per manufacturer directions
- Handling Time – 3-5 days
- This sale does not include any guarantees from the manufacturer
- Smoke Free/Pet Free Home
- I pack items carefully for shipping (In the unlikely event that an item arrives damaged, please contact me immediately and DO NOT discard the box or any of the packing materials)
- Thanks so much for shopping and have a Blessed Day!