Kestrel 4300 Construction/Concrete Weather Tracker -New Start Price USD 279.00 Current Price USD 279.00 Time Left - Bid Count 0 Buy It Now Price - Reserve Price - Start Time Wednesday, July 23, 2008 End Time Saturday, August 02, 2008 Location Lake Norman, NC See more about 'Kestrel 4300 Construction/Concrete Weather Tracker -New' Description SquareTrade © AP6.0Kestrel 4300 Construction Weather Tracker The new Kestrel 4300 Construction Weather Tracker, NK's latest specialty Kestrel meter, measures and displays evaporation rate, which is a function of relative humidity, temperature and wind speed. Evaporation rate is a critical environmental indicator that concrete contractors use to ensure they avoid plastic shrinkage cracking of expensive concrete installations. Plastic shrinkage cracking occurs when the surface of the concrete dries too quickly and shrinks before the bed has cured enough to resist cracking. Previously, construction foremen have employed a Kestrel Meter to measure the relevant conditions, then referenced an American Concrete Institute chart to calculate the evaporation rate. The new Kestrel 4300 Construction Weather Tracker does the work for them! The user simply enters the concrete temperature (obtained via an IR or probe thermometer) and the 4300 calculates the evaporation rate instantly. In addition to evaporation rate, the Kestrel 4300 remains the perfect rugged all-purpose construction weather tool, measuring and logging the following relevant weather conditions right where the workers and equipment are operating. Many construction applications require documentation of conditions which is made quick and easy with the Kestrel Interface and accompanying software. Take advantage of the 4300's 1800 data-point log and document that the work was done during the appropriate conditions, then use the Kestrel Interface to upload stored data to a PC for long-term storage, in-depth analysis and detailed charting. For maximum accuracy when measuring the evaporation rate, measure the concrete temperature via IR or a probe thermometer, enter the concrete temperature into the Kestrel, and position the unit facing into the wind, 20 inches above the concrete. Shade the Kestrel's thermistor (temperature sensor) so it is not in direct sunlight. For the best accuracy, use the Kestrel's convenient averaging mode to average the evaporation rate over the recommended 6-10 seconds. Kestrel's Mini Tripod is a great companion for the 4300—it measures 15 inches tall, positioning the Kestrel 4300 20 inches above the concrete. Every Kestrel is individually calibrated to NIST-traceable standards and comes with a free Certificate of Conformity. Individual NIST certificates and recalibration are also available. Kestrel 4300 Measures Evaporation rateRelative humidityCurrent, maximum and average Wind SpeedTemperatureDewpointBarometric pressureHeat stress indexWet bulb temperatureWind chillAltitudeDensity altitude Kestrel 4300 Features Waterproof and floatsBacklight for low light conditionsData logger (automatic and manual)Customizable data storage – 1800 data pointsMulti-Function 3-line displayConvenient averaging mode Data charting Humidity sensor can be recalibrated in the field with our Relative Humidity Calibration Kit. User-replaceable impeller Flip-top impeller cover Upload to a computer (with optional interface) Five languages (English, French, Spanish, German, and Italian) US Patent Nos. 5,783,753 and 5,939,645 and 6,257,074 5-year warranty Assembled in the USA Kestrel 4300 Includes Soft carry pouchWrist and neck lanyardsBatteries – 2 AAAKestrel Certificate of Conformity I ship by USPS Priority Mail, or worldwide by First Class International Mail..  Shipping in US is free and worldwide is $20.00.  I prefer PayPal,  money orders or personal checks (US only and order will be held 10 days to allow check to clear).  I leave you positive feedback as soon as funds are received, and normally ship within 24 hours of order.  Thanks for looking. John 911NCBuyers in Italy, Greece and Malta, customs have been holding up shipments and delivery is taking between 30-45 days for orders to arrive.  Worldwide buyers are responsible for any import taxes or VAT.    Accessories - Check out my other auctions for these accessories for your meter and save on shipping on combined orders..                                                            Replacement Impeller                              Tripod                                       Silva 340 Compass                Silva Polaris Compass                                                                         Kestrel Cases                                    Kestrel Interface                                Field Calibration Kit                Weather Vane     SquareTrade © squaretrade warranty v2.0 Place a Bid!