Part Details | MERCURIAL BAROMETER
6685-00-991-5461 A barometer consisting of a column of mercury which rises and falls within a tube due to variations of atmospheric pressure.
Alternate Parts: 2380, 2-380, 02380, 02-380, 2380, 2-380, 02380, 02-380, 6685-00-991-5461, 00-991-5461, 6685009915461, 009915461
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1962 | 00-991-5461 | 01072 ( BAROMETER, MERCURIAL ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 6685-00-991-5461
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 2-380 | 22527 | FISHER SCIENTIFIC COMPANY L.L.C. |
| 02-380 | 22527 | FISHER SCIENTIFIC COMPANY L.L.C. |
| 2-380 | 94480 | FISHER SCIENTIFIC WORLDWIDE |
| 02-380 | 94480 | FISHER SCIENTIFIC WORLDWIDE |
Technical Data | NSN 6685-00-991-5461
| Characteristic | Specifications |
|---|---|
| CISTERN TYPE | ADJUSTABLE |
| TUBE BORE DIAMETER | 0.250 INCHES NOMINAL |
| SCALE RANGE | +25.5 TO +31.7 INCHES ABSOLUTE PRESSURE BELOW BAROMETER |
| GRADUATION UNIT | 0.010 INCHES |
| OVERALL LENGTH | 42.000 INCHES NOMINAL |
| OVERALL WIDTH | 3.000 INCHES NOMINAL |
| SPECIAL FEATURES | CAN BE USED UP TO 3000 FT, 900 M, ABOVE SEA LEVEL; DOUBLE SCALE ALSO READS 647 TO 805 MM AT 0.1 MM DIV; DOUBLE SCALED THERMOMETER READS IN C AND F; MERCURY LEVEL AND WHITE ZERO POINTER ARE CLEARLY VISIBLE IN GLASS CISTERN; WHITE BACKING FOR CISTERN AND MENISCUS; UNIFORM BORE 1/4 INCH, 6.4 MM, SO CAPILLARY DEPRESSION IS CONSTANT AND TAKEN INTO ACCOUNT IN CALIBRATION; TUBE IS IN METAL CASING ON 3 BY 42 INCH WOOD PANEL; MERCURY IS INCLUDED |
| FUNCTIONAL DESCRIPTION | ADJUST LEVEL OF MERCURY POOL SO ITS SURFACE JUST TOUCHES THE WHITE ZERO POINTER WHICH FIXES ZERO POINT OF COLUMN; USE SCALE AND VERNIER TO READ COLUMN HEIGHT; MAKE CORRECTIONS FOR TEMP AND GRAVITY AS SHOWN IN INSTRUCTIONS, THIS WILL GIVE TRUE BAROMETRIC PRESSURE AT DESIRED LOCATION |