Admirals Choice Aneriod Barograph

Fischer

265MQ Brass

or 6 weekly interest-free payments of $ 581.66 NZD Laybuy What's this?
Product Name: Fischer Admirals Choice Barograph 265MQ

Brand: Fischer 

If Product not in Stock expect a small delay of 6 weeks


Materials: 

  • Solid wood / Mahogany
  • Movement brass and steel, with flat chrome finish
  • Quartz clockwork.
Size: 
  • 200mm High or 8" inches
  • 200mm wide or 8"
  • 300mm long or 12''
Features:
  • Runs in 3 modes: daily, weekly, and monthly
  • An Exhibition Class barograph with a difference.
  • It is not only an elegant housing, but since it comes from Fischer Instruments, it is a certified high-accuracy instrument. 
  • A scientific instrument in a work of art.
  • Quality Weather Instrument made in Germany
  • Solid wood / Mahogany  & Chrome/ Brass instruments
  • Made of high quality materials
  • High Accuracy
  • Each instrument is hand made, numbered, and calibrated at the factory in Germany and a certificate guaranteeing its performance is included.
Who would use an Aneroid Barograph?
  • Larger yachts and ships,
  • Land based weather bureaus,
  • Many are in use in the UK Met Offices and other European weather services, as well as by individual weather watchers, worldwide.
  • Fischer barographs are used by navies and weather services, worldwide.
What is the Difference between models 267 models and the 287 models ?


in principle the function of both Barograph version is the same, the measuring & recording of the absolute air pressure.
Nevertheless there a some differences between 267M and 287M which causes the significant price difference:

The 267M has another housing with 5 glasses (faceted float glass), the 287M housing has only 4 glasses (closed cover).
Besides of this the mechanics are different. All parts of the movement of the 267M are made of polished brass, the 287M
has a black movement holder (aluminum), the transmission is also made of polished brass.

What does this device do?

Aneroid barographs are used to measure and record the history of atmospheric pressure.
Pressure and Weather
Due to the gravity earth is surrounded by a mantle of air (atmosphere). The static pressure that acts to the surface of the earth is called atmospheric pressure. Because of variable warming of the different latitudes, formation of the continents and seas and motion processes in the atmosphere the atmospheric pressure is uneven. The global mean value of the atmospheric pressure at sea level is 1013.25 hPa. In Central Europe it varies mainly between 990 and 1040 hPa.
A barometer - Displays the present pressure and the change of pressure since it was last set using a marker hand on the dial. 
A barograph  - Records the history of the pressure on a paper chart, wrapped around a clock-driven drum. 
A log book -  is usually used to track pressure changes and weather.
This device gives you a great way to learn how the pressure changed during the night when there was no watch to record it.
What does it use to take a measurement? How does it maintain accuracy?

Measuring Ranges 

Measuring range    used for altitude
955 to 1055 hPa 
930 to 1030 hPa 
905 to 1005 hPa 
880 to 980 hPa 
855 to 955 hPa        0 to 150 m above sea level
150 to 350 m above sea level
350 to 600 m above sea level
600 to 850 m above sea level 
850 to 1,100 m above sea level

Measuring
  • It uses a set of 7 aneroid capsules with a diameter of 62 mm made from copper-beryllium alloy. This material essentially eliminates age-hardening, hysteresis, and elastic after effects that could otherwise degrade the accuracy. 
  • The influence of temperature on the set of aneroid capsules and the transmission system is compensated by use of bi metal components over the full measuring range and for temperatures between -30 to +40 °C (-22 to 104 °F). 
  • All contacts in the movements are jeweled to reduce friction. 
Clockwork
  • Can we wind up or Quartz
  • Can be shifted to take daily weekly or monthly measurements
  • The actual periods are 25.6 hr, 176 hr, and 783 hr. 
  • Note that the mechanical clocks do not have a monthly mode. 
  • Weekly rotations are the most common used with barographs.

Recording Instruments

  • The recording instruments are delivered complete with fibre pens and a year's supply of recording charts. 
  • Weekly charts are the standard that are provided unless requested otherwise. 
Dampening
  • Fischer instruments are unique in offering an option on each model with enhanced dampening for barograph use at sea. 
  • After you chose your model and timing option, the extra dampening can be selected. 
  • There is no need for this option for land based operations.
Charts
  • The paper charts are the same size for all models: 92mm tall by 302 mm long. 
  • Charts marked in inches of mercury are also available on request.


Precision Weather Instruments

From Fischer in Germany

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Why buy from us:


FREE GIFT WRAPPING & GIFT DELIVERY. 

Why Pay Shipping Twice? Let us ship your gift to their door. Just add gift wrapping to cart, and use their address as the delivery address when you place the order, and we will take care of the rest.

Fast Free International Shipping

We offer free International Delivery on all of our weather instruments. Where ever possible we dispatch on the same day, so you can get your order fast. NZ orders usually arrive in 2-4 business days, Australian orders in 4-7 business days, International orders in 6-12 business days.

PACKED WITH CARE.

 We ensure your weather stations and gifts are packed with care. We use several layers of reinforcement to ensure they arrive in pristine condition. Here is a video showing you how we pack them with love ... and bubble wrap.

2 YEAR MANUFACTURERS WARRANTY. 

All Fischer weather stations come with a 2 year manufacturers warranty. So you can purchase risk free. Should anything go wrong with your weather instrument (which seldom happens) we can also service it in house in our service center.

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