We are glad that you are considering a PerformAIRE Weather Station!
If you are also considering other brands please be aware of other “pocket sized” weather stations that are being promoted in the racing industry. These are manufactured for hiking, mountain climbing, and aviation purposes. Although they readout a “Density Altitude” (DA), it is a standard calculation and does not relate to performance factors of an internal combustion engine.
Altronics Inc holds the patent #5,509,295 on the racing weather station and uses proprietary calculations to compute a DA that can correctly measure oxygen levels and adjust for the effects of water content in the air as they relate to combustion. If you are interested in a pocket sized weather station that was built specifically for racing check out the PerformAIRE Pocket!
Don’t waste your money on an ineffective tool. Contact us for more info!