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Halo, Saya Pebisnis Saya mengenal produk ini dari https://www.indotrade.co.id dan saya lihat hal ini mungkin berguna untuk anda. ------------------------------------------------------- Digital Altimeter, Barometer, Thermometer, Clock & Compass Ambient Weather WS-108 * The Keychain Weather Station includes a digital clock, thermometer, altimeter, compass, and barometer ( relative and absolute with sea-level correction) , and a weather forecaster. * The Keychain Weather Station is big on features and functions, yet small on price and size, and features a convenient carabiner clip for simple carrying and quick access. * Perfect for hiking, camping, running, biking, skiing, snowboarding, mountaineering, climbing, boating, kayaking, and outdoor activities, the Keychain Weather Station is a perfect backup to your GPS. * IMPORTANT NOTE: This is an explanation about how altimeters work in general and is applicable to all altimeters. Altimeters are often misunderstood because they do not measure your actual position on the earth ( true altitude) such as a GPS, but measure the air pressure and predict the altitude based on this measurement. This is referred to as " Pressure Altitude" . Pressure Altitude is profoundly affected by the true altitude and to a lesser extent, changes in the weather, often referred to as barometric pressure changes. Thus, your Pressure Altitude can change without changing your position. These changes can be as great as a few hundred feet ( the changes due to weather are more pronounced at higher altitude) . To offset the difference between Pressure Altitude and True Altitude, you must calibrate the device at a known altitude, whenever convenient. * IMPORTANT NOTE: The temperature sensor is housed inside the unit and not exposed to the elements. The temperature is slow to respond because the entire housing must reach a steady-state temperature. This is referred to as the ' thermal mass time constant' . In addition, the unit will read artificially high temperature if placed in direct sunlight ( due to the solar radiation energy) . To receive a true measurement, place in a shaded area and out of contact with your body, and wait several minutes for the temperature to stabilize. Product Description Altimeter: Working Range: -2, 296 to 29, 500 feet Calibration compensates for barometric pressure effects Resolution: 3 feet Units: feet and meters Maximum history altitude record Altitude climb measurement Barometer: Relative and sea-level barometer Units: inHg and mbar Digital Compass: 4-bearing mode display External magnetic field calibration Magnetic declination setting Accuracy: + / - 3 degrees 1 degree resolution Units: degree and 16 compass point direction ( N, NNE, NE, ...) Thermometer: Range: 14 to 140 deg F Units: degC and degF Digital Clock: Quartz Clock 12 and 24 hour format Hour, Minute Weather Forecast: Forecast 12 to 24 hours in advance Icons indicate sunny, partly cloudy, cloudy and rain ( at a fixed altitide) Other Features: 30 second super bright LED backlight Adjustable bezel dial Description: Dimensions: 2.5 x 2.0 x 0.6 inches Battery: 1 x CR2032 ( included) . Easy to replace. Untuk informasi selengkapnya, silahkan ke http://www.indotrade.co.id/karya_tehnik/2505441
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