{"title":"Instruments which measure Delta T","description":"\u003ch2 style=\"text-align: left;\"\u003eKestrel Meters which measure Delta T\u003c\/h2\u003e\n\u003cp style=\"text-align: left;\"\u003eDelta T is a reading commonly used in dry climates to provide a quick guide to acceptable spraying conditions. It’s the spread between the wet bulb temperature and the dry bulb temperature. For example, it is not recommended to apply pesticides when Delta T is above 10. A range of 2 to 8 is ideal. With the new Kestrel Delta T Meters, the calculation is done for you, accurately and simply. Because the wet\/dry bulb spread can be quite small, even a small error in either temperature reading will generate a large percentage of error in Delta T. The Kestrel 3500 Delta T Meters correct for pressure, ensuring that Delta T is measured accurately.\u003cbr\u003e\u003ca href=\"https:\/\/www.extrememeters.com\/collections\/kestrel-meters\" title=\"Check out all Kestrel Meters\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/www.extrememeters.com\/collections\/kestrel-meters\"\u003eCheck out all Kestrel Instruments Here!\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e","products":[{"product_id":"kestrel-3500-delta-t-pocket-weather-meter","title":"Kestrel 3500DT Pocket Delta-T Crop Spraying Weather Meter","description":"\u003ch4\u003eKestrel 3500DT Delta-T Pocket Weather Meter – USA-Made, Essential Weather Data for Optimal Spraying Conditions – Waterproof, Floats, Includes 5-Year Warranty\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003eKestrel 3500DT Delta-T Pocket Weather Meter\u003c\/strong\u003e is a professional-grade tool designed to provide accurate and comprehensive weather data, crucial for agricultural applications like crop spraying. \u003cstrong\u003eBuilt in the USA\u003c\/strong\u003e, this reliable weather meter measures key environmental factors including \u003cstrong\u003ewind speed\u003c\/strong\u003e, \u003cstrong\u003etemperature\u003c\/strong\u003e, \u003cstrong\u003ebarometric pressure\u003c\/strong\u003e, \u003cstrong\u003erelative humidity\u003c\/strong\u003e, \u003cstrong\u003edew point\u003c\/strong\u003e, and \u003cstrong\u003eDelta-T\u003c\/strong\u003e—a critical value for assessing optimal spraying conditions. Whether you're a farmer, pest control professional, or field expert, the \u003cstrong\u003eKestrel 3500DT\u003c\/strong\u003e ensures you're always working within safe, effective conditions and helps you select the \u003cstrong\u003eright spray nozzle\u003c\/strong\u003e for the job.\u003c\/p\u003e\n\u003ch5\u003eWhy the Kestrel 3500DT is Perfect for Spraying Applications:\u003c\/h5\u003e\n\u003cp\u003eThe \u003cstrong\u003eKestrel 3500DT Delta-T Pocket Weather Meter\u003c\/strong\u003e is specifically designed to help you assess \u003cstrong\u003eoptimal spraying conditions\u003c\/strong\u003e by measuring \u003cstrong\u003eDelta-T\u003c\/strong\u003e and other critical environmental factors. By understanding \u003cstrong\u003eDelta-T\u003c\/strong\u003e, you can ensure your spraying activities are within acceptable guidelines and choose the correct spray nozzle for optimal application, improving efficiency and reducing waste. Whether you're working in agriculture, pest control, or any outdoor setting, this meter provides all the data you need to make informed decisions for safer, more effective spraying.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Kestrel","offers":[{"title":"Default Title","offer_id":37454290780325,"sku":"0835DT","price":219.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0344\/1457\/products\/kestrel-3500dt-pocket-delta-t-crop-spraying-weather-meter0835dtextrememeterscom-102852.jpg?v=1685902539"},{"product_id":"kestrel-5200-professional-environmental-meter","title":"Kestrel 5200 Professional Environmental Meter","description":"\u003ch4\u003eThe Kestrel 5200 eliminates the guesswork from difficult projects like pouring concrete, balancing HVAC systems, and monitoring job site conditions with its integrated specialty calculations.\u003c\/h4\u003e\n\u003cp\u003eThe Kestrel 5200 offers advanced calculators and readings that are unique in the portable meter market and are designed to make your job easier. In addition to measuring current environmental conditions, the Kestrel 5200 tracks and logs over 10,000 sets of time-stamped data. Your data log can be transferred to a mobile device wirelessly with the LiNK wireless communication option and Kestrel LiNK app, or to a PC\/MAC with either the accessory Kestrel LiNK Dongle or waterproof USB Data Transfer Cable (available separately).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"float: right;\"\u003eThe Kestrel 5200 has the American Concrete Institute Evaporation Rate nomograph built in, and displays the Evaporation Rate right on screen with no calculation or error-prone interpolation. With that information in hand, decisions about additives to the mix or curing adjustments can be made, prevent costly plastic shrinkage cracks of the slab. Plus, the Kestrel 5200 allows you to monitor wind-loading on booms and cranes, and even track the heat index on your work site to keep your workers safe.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHVAC\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"float: left;\"\u003eVolume air flow couldn’t get any easier than this. Simply input the duct shape and dimensions and traverse the Kestrel 5200 across the duct. You’ll get instantaneous and average volume air flow without the need for any geometry or calculations. readings that greatly assist in commissioning and performance balancing HVAC systems. While not a replacement for a balometer, the Kestrel 5200 is far less expensive and can save you time and money. The Kestrel 5200 also offers every commonly-used measurement of moisture content in air, making life easy to determine dehumidification needs.\u003c\/p\u003e\n\u003ch6\u003eLiNK (Bluetooth)\u003c\/h6\u003e\n\u003cp\u003eThe 5200 with LiNK Bluetooth Connectivity, gives you the option to transfer data wirelessly to an iOS (iPhone, iPad) device or Android smartphone or tablet when within range using the appropriate app (See Below). Also with the 5200 with LiNK Meter, you can transfer data wirelessly to a Windows or Mac computer using the optional Kestrel Bluetooth USB Dongle\u003ca href=\"\/en-th\/products\/link-wireless-dongle-for-pc-or-mac-for-kestrel-5000-series-meter-with-link\" title=\"Kestrel USB Bluetooth Dongle\"\u003e.\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv class=\"data item content\" id=\"product.quick_look\" data-role=\"content\" aria-labelledby=\"tab-label-product.quick_look\" role=\"tabpanel\" aria-hidden=\"false\"\u003e\n\u003cdiv class=\"nk_text\"\u003e\n\u003cp\u003eCheck out our \u003cstrong\u003eConcrete Pro Jobsite Weather Kit\u003c\/strong\u003e. Includes a Small Tripod, Extension, Vane Mount and Hard Case.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch5\u003eWho's using the Kestrel 5200?\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eConstruction and Concrete Pouring\u003c\/li\u003e\n\u003cli\u003eFacilities Management\u003c\/li\u003e\n\u003cli\u003eHVAC \u0026amp; Air Conditioning Balancing\u003c\/li\u003e\n\u003cli\u003eRemediation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Kestrel","offers":[{"title":"Bluetooth LiNK Enabled","offer_id":31345395859513,"sku":"0852LHVG","price":369.0,"currency_code":"USD","in_stock":true},{"title":"Standard Non-LiNK","offer_id":31345395826745,"sku":"0852HVG","price":309.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0344\/1457\/products\/kestrel-5200-professional-environmental-meterwith-link0852lhvgextrememeterscom-304111.jpg?v=1685902564"},{"product_id":"kestrel-5400ag-cattle-heat-stress-tracker-with-link-vane-mount","title":"Kestrel 5400AG Livestock Heat Stress Tracker with LiNK + Vane Mount","description":"\u003ch5\u003eCattle heat stress can sharply reduce production and lead to economic losses.\u003c\/h5\u003e\n\u003cp\u003eImplement an effective management plan based on objective and accurate THI, HLI and AHLU measurements at the pen level with Kestrel. Rugged hand-held meter can also be mounted with included hardware for longer term monitoring of heat events.\u003c\/p\u003e\n\u003ch5\u003eKestrel 5400AG Cattle Heat Stress Tracker with LiNK + Vane Mount Overview\u003c\/h5\u003e\n\u003cp\u003eThe Kestrel 5400 Cattle Heat Stress Tracker offers micro-climate measurement and monitoring at the pen or yard location. Contains a built-in Globe Temperature sensor and complete cattle-specific calculations. Measure THI and HLI and track AHLU based on easy-to-input herd and pen parameters. Perform spot checks or mount in place with the included vane mount accessory to track AHLU for months.  LiNK capability allows remote access to current and logged data from your iOS or Android mobile device. Mount a mobile data equipped tablet nearby to send mobile alerts even when you’re not on-site. Designed by Kestrel with input from some of the world’s most respected experts in cattle heat stress, the Kestrel 5400 Cattle Heat Stress Tracker is designed to help you MEASURE and MANAGE your herd’s heat stress, ensuring you MAXIMIZE your bottom line.\u003c\/p\u003e","brand":"Kestrel","offers":[{"title":"Default Title","offer_id":23331426949,"sku":"0854AGLVCHVG","price":649.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0344\/1457\/products\/kestrel-5400ag-livestock-heat-stress-tracker-with-link-vane-mount0854aglvchvgextrememeterscom-590038.jpg?v=1685904091"},{"product_id":"kestrel-5500ag-agriculture-weather-meter","title":"Kestrel 5500AG Agriculture \/ Livestock Weather Meter","description":"\u003ch4\u003eAgricultural production necessitates data specific to each location's indoor climate and outdoor conditions.\u003c\/h4\u003e\n\u003cp\u003eThe Kestrel 5500AG is your comprehensive meter for condition monitoring and record keeping on the farm, ranch, or in the field. The Kestrel 5500AG provides you with data for risk identification, environment assessments, and action plan development. This meter includes THI, compass for direction and Delta T, an additional measurement to aid spraying applications.\u003c\/p\u003e\n\u003cp\u003eGet the environmental data you need for livestock and crop production and other farm and ranch activities. This lightweight, handheld, multi-function meter can be used inside and out for barn\/facility condition assessments to spraying decisions where both wind speed and direction must be recorded. This comprehensive meter will deliver spot measurements, log and store data, and aid in auditing and record keeping. The Kestrel 5500AG is easily carried in a pocket or glove box and is ready to help whenever and wherever needed. Its rugged build and waterproof case mean it can work as hard as you do. Be prepared: be informed of local and micro-climate environments at your site. \u003c\/p\u003e\n\u003cp\u003eClip the Kestrel 5500AG into the optional \u003cstrong\u003eKestrel 5 Series Rotating Vane Mount\u003c\/strong\u003e and you have a sturdy weather station that can be left in place for days or weeks.\u003c\/p\u003e\n\u003ch5\u003eSpray Management:\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003e\u003c\/strong\u003eThe Kestrel 5500AG provides Delta T measurements to aid in assessing acceptable spraying conditions and ensure you're within guidelines. Based upon ambient temperature and dew point, Delta-T provides guidance on the evaporation rate of sprayed chemicals to help you select the right spray nozzle. The compass provides direction to minimize spray drift. The Kestrel 5500AG calculates and logs on-site Delta T, wind speed, and direction without any additional user input. When combined with the Kestrel’s average wind and max wind gust measurements, agriculture professionals can ensure they spray safely, every time. Use an accessory carry pouch to keep your Kestrel handy on your belt, ready to go before any spraying operations. Spraying with Dicamba can be harmful if it drifts to a neighbors crop. With the Kestrel 5500AG, you can log important data including wind speed, direction and Delta T. You can also email data logged with the Kestrel 5500AG with LiNK, and the Kestrel LiNK app for your smartphone.\u003c\/p\u003e\n\u003ch5\u003eHeat Stress Management with THI:\u003c\/h5\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eTHI\u003c\/strong\u003e, \u003c\/span\u003e(Temperature-Humidity Index) has been used for decades as a measure to classify heat stress risk in many livestock production and transportation operations. This measurement includes both temperature and relative humidity and is a basis for both strategic and tactical management practices which benefit animal health, productivity and well-being. The Kestrel 5500AG calculates and logs on-site THI based on user selection of either the NRC(National Research Council, 1971) or Yousef(Yousef, 1985) accepted THI calculations. Objective and accurate site-specific measurements are critical to ensuring a heat stress management strategy that is cost effective; and they're at your fingertips with the 5500AG.\u003c\/p\u003e\n\u003ch5\u003eBarn \/ Housing Ventilation Assessments:\u003c\/h5\u003e\n\u003cp\u003eRegardless of the type of barn\/house design all livestock require proper ventilation and air movement to maximize health, growth, and comfort.  The Kestrel 5500AG provides wind speed and air flow measurements to quickly quantify air movement in the vicinity of livestock, locate drafts, measure fan effectiveness and confirm duct discharge velocity. Volume air flow takes duct shape and dimensions into account and allows for accurate comparison of various locations in a system. No calculator is needed to determine airflow with the Kestrel 5500AG – a few quick menu picks and built-in averaging gives you accurate readings instantly.\u003c\/p\u003e\n\u003ch5\u003eMicroclimate, Harvest and Storage Conditions:\u003c\/h5\u003e\n\u003cp\u003eMany livestock professionals also grow and store grains, hay and other feedstuffs. The Kestrel 5500AG can measure micro-climates around the farm to determine where mold and disease may be a problem, ensuring conditions are right for harvesting, drying, and storage. Leave the Kestrel 5500AG in place anywhere in the field, barn or greenhouse to get a graphical history of overnight conditions, (the \u003cstrong\u003eKestrel 5 Series Rotating Vane Mount\u003c\/strong\u003e and a ¼-20 camera clamp or tripod makes it easy).\u003c\/p\u003e\n\u003ch5\u003eChoose Kestrel LiNK Option to add the power of Apps:\u003c\/h5\u003e\n\u003cp\u003eLiNK is Kestrel’s wireless data communication system, powered by \u003cstrong\u003eBluetooth\u003csup\u003e®\u003c\/sup\u003e low energy\u003c\/strong\u003e. Choose the Kestrel 5500AG with LiNK option and you get full iOS, Android, PC and Mac app support.  See real-time readings on your phone or tablet on a customizable dashboard up to 100’ away (line of sight). Download stored data from your Kestrel to save or share it. Plus, you can update the firmware on your Kestrel when improvements are released.\u003c\/p\u003e\n\u003cp\u003eNote: \u003cstrong\u003eBluetooth\u003csup\u003e®\u003c\/sup\u003e low energy\u003c\/strong\u003e is built into all recent iOS and Android devices. PC and Mac connectivity require purchase of a \u003cstrong\u003eKestrel LiNK USB Dongle\u003c\/strong\u003e. Non-LiNK units can be connected to PC’s and Mac’s, but NOT phones and tablets, using the \u003cstrong\u003eKestrel USB Data Cable\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Kestrel","offers":[{"title":"Standard Non-LiNK","offer_id":23331697221,"sku":"0855AGHVG","price":389.0,"currency_code":"USD","in_stock":true},{"title":"Bluetooth) LiNK Enabled + FREE Vane Mount","offer_id":23331697285,"sku":"0855AGLVHVG","price":459.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0344\/1457\/products\/kestrel-5500ag-agriculture-weather-meterwithout-link0855aghvgextrememeterscom-626349.jpg?v=1685902557"},{"product_id":"kestrel-concrete-pro-jobsite-weather-kit","title":"Kestrel 5200 Concrete Pro Jobsite Weather Kit","description":"\u003ch4\u003eAvoid the expense of plastic shrinkage cracking by utilizing this easily transportable jobsite weather monitoring kit.\u003c\/h4\u003e\n\u003ch4\u003eThis kit comes complete with:\u003c\/h4\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e(1) Kestrel 5200 Professional Environmental Meter with LiNK Wireless Communication\u003c\/li\u003e\n\u003cli\u003e(1) Rotating Vane Mount\u003c\/li\u003e\n\u003cli\u003e(1) Portable Mini Tripod with Extension Rod\u003c\/li\u003e\n\u003cli\u003e(1) Protective Hard Carrying Case\u003c\/li\u003e\n\u003cli\u003eChoose to add up to (2) Kestrel HiViz Green D2 DROP Dataloggers at additional cost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe Kestrel Concrete Pro Jobsite Weather Kit includes the Kestrel 5200 Professional Environmental Meter with LiNK, Rotating Vane Mount, and Portable Mini Tripod with Extension Rod.\u003c\/p\u003e\n\u003cp\u003eThe Kestrel 5200 offers advanced calculators and readings that are unique in the portable meter market and are designed to make your job easier. In addition to measuring current environmental conditions, the Kestrel 5200 tracks and logs over 10,000 sets of time-stamped data. Your data log can be transferred to a iOS\/Android wirelessly with the LiNK wireless communication option and Kestrel LiNK app, or to a Windows or Mac computer.\u003c\/p\u003e\n\u003cdiv aria-hidden=\"false\" role=\"tabpanel\" aria-labelledby=\"tab-label-product.quick_look\" data-role=\"content\" id=\"product.quick_look\" class=\"data item content\"\u003e\n\u003cdiv class=\"nk_text\"\u003e\n\u003cul\u003e\n\u003cli\u003eAutomatically calculates evaporation rate based on current weather conditions, and measures air velocity, air flow, air density, relative air density, delta T, and much more. 17 measurements in all!\u003c\/li\u003e\n\u003cli\u003eNew concrete Evaporation Rate Solver calculates the evaporation rate for different sets of environmental conditions and displays the risk for plastic shrinkage cracking (Low\/Medium\/High) allowing contractors to take steps to prevent cracking\u003c\/li\u003e\n\u003cli\u003eLarge, hi-res, hi-contrast, graphic display is perfectly readable in the brightest sunlight and is backlit for use in low-light conditions\u003c\/li\u003e\n\u003cli\u003eHandheld, portable, data logger with on-screen graphing and measurement statistics\u003c\/li\u003e\n\u003cli\u003eOptional LiNK connectivity powered by \u003cem\u003eBluetooth® low energy\u003c\/em\u003e provides wireless communication to mobile devices and computers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch6\u003eWho's using the Kestrel 5200?\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eConstruction and Concrete Pouring\u003c\/li\u003e\n\u003cli\u003eFacilities Management\u003c\/li\u003e\n\u003cli\u003eHVAC \u0026amp; Air Conditioning Balancing\u003c\/li\u003e\n\u003cli\u003eRemediation\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Kestrel","offers":[{"title":"No DROP's added","offer_id":46726173098207,"sku":"0852LVTCK","price":489.0,"currency_code":"USD","in_stock":true},{"title":"Add (1) D2 DROP Datalogger","offer_id":46726171885791,"sku":"0852LVTCK-1","price":588.0,"currency_code":"USD","in_stock":true},{"title":"Add (2) D2 DROP Dataloggers","offer_id":46726171918559,"sku":"0852LVTCK-2","price":687.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0344\/1457\/files\/kestrel-concrete-pro-jobsite-weather-kit-front_with_no_DROPS.jpg?v=1738446319"},{"product_id":"kestrel-3550ag-spraying-weather-meter","title":"Kestrel 3550AG Pocket Delta T Crop Spraying Weather Meter","description":"\u003ch4\u003eKestrel 3550AG Spraying Weather Meter – Designed for Accurate Crop Spraying Conditions – USA-Made, Waterproof, Floating, Bluetooth-Enabled with Delta-T, Wind Speed, Temperature \u0026amp; More\u003c\/h4\u003e\n\u003cp\u003eThe \u003cstrong\u003eKestrel 3550AG Spraying Weather Meter\u003c\/strong\u003e is a top-tier, \u003cstrong\u003eUSA-made\u003c\/strong\u003e weather meter designed specifically for the agricultural industry, enabling farmers and applicators to accurately assess \u003cstrong\u003ecrop spraying conditions\u003c\/strong\u003e and ensure effective, safe applications. Whether you're measuring \u003cstrong\u003ewind speed\u003c\/strong\u003e, \u003cstrong\u003etemperature\u003c\/strong\u003e, \u003cstrong\u003ehumidity\u003c\/strong\u003e, \u003cstrong\u003ewind chill\u003c\/strong\u003e, or \u003cstrong\u003eDelta-T\u003c\/strong\u003e, this meter helps you make informed decisions for optimal spraying. The \u003cstrong\u003eKestrel 3550AG\u003c\/strong\u003e also provides \u003cstrong\u003eBluetooth\u003c\/strong\u003e connectivity, allowing for seamless data logging, record-keeping, and drift management in real-time.\u003c\/p\u003e\n\u003ch5\u003e\n\u003cstrong\u003e\u003c\/strong\u003ePerfect for Agricultural Spraying and Drift Management\u003c\/h5\u003e\n\u003cp\u003eThe \u003cstrong\u003eKestrel 3550AG Spraying Weather Meter\u003c\/strong\u003e is designed to meet the specific needs of \u003cstrong\u003eagricultural professionals\u003c\/strong\u003e. By providing critical data on \u003cstrong\u003ewind speed\u003c\/strong\u003e, \u003cstrong\u003etemperature\u003c\/strong\u003e, \u003cstrong\u003ehumidity\u003c\/strong\u003e, and \u003cstrong\u003eDelta-T\u003c\/strong\u003e, it helps you ensure safe and effective \u003cstrong\u003ecrop spraying\u003c\/strong\u003e. With features like \u003cstrong\u003eBluetooth connectivity\u003c\/strong\u003e, \u003cstrong\u003ewaterproof construction\u003c\/strong\u003e, and \u003cstrong\u003edrift management\u003c\/strong\u003e tools, the \u003cstrong\u003eKestrel 3550AG\u003c\/strong\u003e is a reliable companion for managing spraying conditions, tracking weather data, and optimizing your spraying operations.\u003c\/p\u003e","brand":"Kestrel","offers":[{"title":"Default Title","offer_id":37454328103077,"sku":"0835AGLCHVG","price":239.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0344\/1457\/products\/kestrel-3550ag-pocket-delta-t-crop-spraying-weather-meter0835aglchvgextrememeterscom-805573.jpg?v=1685904016"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0344\/1457\/collections\/instruments-which-measure-delta-t-127530.jpg?v=1685902481","url":"https:\/\/www.extrememeters.com\/en-th\/collections\/delta-t.oembed","provider":"Extreme Meters LLC.","version":"1.0","type":"link"}