- Brand: by the source of
- Item: Altimeter (barometer, thermometer, compass) Altitude table
- made in China
- Price tag: 168
- Sports Outdoor: Cycling Cross-Country Walking Camping Climbing Climbing Climbing Upstream Creek Drifting Skiing
- Time to market: 2012
- Purposes: thermometer
- Waterproof: Yes
- Whether the shock: Yes
- Whether the luminous display: No
- To carry: hanging button
- Display: digital
Brand: by source up to zengyuanda
Name: 4 - in - 1 mechanical barometer
Model Number: BKT381
Measurement range: 5000M / 1040hPa / -30 ° C to +50 ° C
Measurement accuracy: 20M / 5hPa / 2 ° C
Close to the climbers of the special design, light and compact, suitable for travel to carry, measure the altitude / pressure / temperature / orientation four functions, climbing, rock climbing, hiking, skiing and other outdoor sports health equipment.
Before climbing, if you know the height of the starting point, adjust the altitude table pointer to a known altitude scale, and then go climbing.In this case the measured data is the absolute height of the mountain (that is, the real altitude ).
If you do not know the height of the departure point, then the altitude table pointer to zero, and then to climb in this case the measured data is the relative height of the mountain, that is relative to the height of the starting point (absolute height = Height of departure + relative height) Relative altitude is not altitude, only with the departure of the height, is the real altitude.
For example: We at the foot of A, the altitude table pointer to zero position when the peak when the 1700 meters, we know that the relative height of this mountain is 1700 meters.
If we know that the foot of the mountain is 50 meters above sea level, then we know that this mountain is 1750 meters above sea level.
Through the altitude table at any time you know where the altitude, in the mountain climbing and adventure sports, to understand their own altitude, for reasonable arrangements for travel, security is very important.
A: The mechanical, do not need the battery, is based on the internal sealed box to induce the air pressure changes the pointer rotation.
2. High accuracy? A: The measurement accuracy: 20M / 5hPa / 2 ° C. Higher accuracy, more electronic to see. 1 M are responsive.
3, why the same place, sooner or later the pointer height is not the same? A: normal, because this is the induction pressure, sooner or later air pressure is not the same, air pressure changes, the pointer will move. Height, there will be errors, all barometers are so.
How long does the warranty last?