Measuring Tape vs True Proof

This application measures the shortest (air) distance between point A and point B using GPS, with the maximum available accuracy. Distances are displayed in yards, meters, kilometers, and miles. Simply reset the ruler at point A and watch the distance counters increase as you move toward point B—just like using a real tape measure or ruler. Primary uses for approximate sizing and measuring include: Land, grounds, and properties Real estate Golf course yardage Sports facilities and tracks Air distance Other outdoor measurements The application is intended for outdoor use only and requires location services to be enabled. How to use: Go to the starting point (A) and press the RESET button to initialize the distance counters. Walk to the target point (B) while watching the distance counters increase. The point A arrow continuously shows the direction back to the starting point. You can close the application at any time during a measurement. When reopened, the application will continue the current measurement.

True Proof calculates the true proof of a water-alcohol mixture at a reference temperature, using the measured apparent proof from a hydrometer reading and the temperature at the time of the reading. True Proof also performs gauging calculations, and can calculate dilutions taking full account of the temperature-dependent nonideal mixing of water and alcohol. Calculations are logged, and may be annotated and emailed for archiving. Multiple units support large-scale distillers and hobby-scale distillers alike, in the US and abroad: concentration measurement in proof, ABV, or density ; temperature in °F or °C; abundance in US gallon, liter, pound, kg, US ton, or metric tonne, etc. The reference temperature can be selected for US (60ºF) or international (20ºC), or any other value in the range [-20ºC,40ºC]. The instrument thermal expansivity can be selected, which enables application to vibrating tube densitometers in addition to hydrometers. Two separate computational models are employed - one based on the (US) TTB gauging manual, and one based on OIML (UK, EU, Canada, etc) data. The computer model is limited in temperature and proof range to that spanned by government standard tables.