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Electronic Barometer
No longer available from Starpath
Inexpensive and easy to use electronic barometer, with good accuracy (once set in mid-range to the correct local pressure. Setting options available below.)
$169.95 ...item# 1872
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Learn how to use your barometer measurements to their full potential with our new Barometer Handbook.
The second generation of a very popular earlier model. Now with more features and improved interface at the same low price. To our knowledge, there is no device on the market with so many practical features in this price range. Shows pressure to nearest tenth of a mb (the World Meteorological Organization standard for pressure reports) as well as graphic history of pressure for up to 48 hours, with full-screen zoom to past 2, 4, 6, or 12 hours. We have tested the forerunner to this device (which has the same pressure sensor and control processor) in comparison to the NWS barometer at the West Point lighthouse near us and to a series of weather maps, taken 4 times a day for 2 weeks during a transpacific crossing. We have also repeated this type of comparison in the 2004 Pacific Cup Yacht Race. This instrument will clearly do the job of evaluating weather maps and spotting pressure changes as early as possible. See Starpath notes on setting up the 4002 Barometer. The unit has these specific advantages: pressure displayed to the tenth of a mb, easy to set (this one takes digital input as opposed to setting by elevation alone), has a 24-hr clock (with two time zones), and the graphic display is much more versatile than other similar products. It also updates every 4 seconds and reaches equilibrium in about 3 minutes, as opposed to every 15 minutes, which is the standard of many electronic barometers. It also offers the option to display the actual pressure at its present elevation, or it can automatically make the correction to display sea level pressure, when the proper elevation of the unit has been entered. Note, this barometer like most on the market, must be set one time to match the official local pressure, after which it should be spot on. You can use www.starpath.com/barometers to set your instrument.
Specifications POWER: 4 AA batteries, included. Estimated lifetime is 5 months with limited use of back-lighting and buzzer alarm. Optional AC adapter available. MEASURES: 5.5" x 4.5" x 1" WEIGHS: 7 ounces (not including shipping materials) This product includes a one-year manufacturer's guarantee. Learn practical marine weather with our Online-Home Study Course on Marine Weather. Additional features:• Two time zones for the clock • Setup and operate the device in any of six languages • Time function includes an alarm function • Can program a pressure change alarm (buzzer) to meet your standards of pressure drop (or rise) • When stepping back through history it shows the time of each pressure saved. • You can enter an elevation and then display the pressure at sea level or the actual pressure at the elevation of the instrument. • Programmable drop rate alarm. • Digital target pressure alarm. • For some strange reason, the device also shows the phase of the moon! Take a look out the window to check if it is right. If it is right, then fine. If not, think of this as a decorative icon that changes from time to time.
Optional 4002 Model Calibration Services The Weems and Plath 4002 barometer, like most electronic barometers, must be set once to the correct pressure so that future readings will be accurate. Once set to an accurate pressure, its subsequent readings should be accurate to within about ± 0.5 mb over the average range of atmospheric pressures at sea level (980 mb to 1040 mb) according to factory specifications. You can set the instrument yourself using local pressure sources (see www.starpath.com/barometers) or we can determine the calibration constant for you before shipping it using our laboratory NIST certified standard barometer. The charge of this service is $20. Here is a sample of the document included when you choose this option. If you choose this option, your barometer will include a unique serial number and you will receive a certificate showing the proper pressure offset value in mb needed to calibrate your barometer. It is important to save your unique correction value, because if the instrument is turned off, or the batteries die before being changed, the set up information will be lost. With a record of the correction value, however, you can just enter the same correction again and you will achieve the same accuracy as before. Add to Shopping Cart: calibration constant for $20 For laboratory applications or other requirements of documented accuracy, you can purchase a full calibration certificate for the instrument from our professional calibration services. The calibration constant service for $20 is essentially a calibration for one specific pressure, and then you rely on manufacturer's specifications for accuracies at other pressures. With a full calibration you get the calibration constants at all working pressures (in steps of 10 mb) and you no longer rely on average factory specifications. |
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