AG Livestock DROP Environmental Monitoring Pack


Livestock heat stress can cause serious health issues in your valuable livestock as well as reduced performance and productivity. Stay informed of heat conditions in the barn or during transport with the Kestrel D2AG Livestock Heat Stress Monitor. Multiple built-in environmental measurements mean your DROP D2AG can also be used for many other agricultural applications including hay and feed storage areas and greenhouses.

Availability: In stock


AG Livestock DROP Environmental Monitoring Pack Overview

Summary of the AG Livestock DROP Environmental Monitoring Pack

This customer-requested bundle of three D2AG DROPs makes monitoring multiple sites and locations for livestock facilities easy AND affordable! Simply leave the DROP anywhere you need environmental monitoring – then view and track micro-climate conditions instantly on your mobile device with the free Kestrel LiNK app. With access to real time conditions and custom alerts to notify you of unsafe conditions, you can manage issues before they become costly problems to keep your livestock healthy and your operation profitable.

Livestock transporters can place these units in multiple trucks for ongoing condition monitoring. Dairies can monitor multiple locations such as resting area, holding area, and maternity pen for heat stress abatement. Livestock handlers can monitor vaccine and medication storage temperatures critical to their efficacy and safety.

All livestock professionals can benefit from knowledge of micro-climate data at their site:

  • Identify areas with sub-optimal conditions
  • Compare managed livestock environmental conditions with outdoor environment
  • Monitor youngstock housing for both hot and cold thermal challenges
  • Quantify and measure livestock level conditions prior to making purchasing/remodeling decisions, and more.

About the Kestrel Drop D2AG Livestock Heat Stress Monitor

The Kestrel Drop D2AG Livestock Heat Stress Monitor is a very affordable rugged heat stress monitor that can be used in the barn, during transport, or anywhere livestock are housed. Simply hang in place wherever insight into conditions is needed, and access current conditions and historical readings with your iOS or Android device. Designed by Kestrel with input from some of the world's most respected experts in livestock heat stress, the Kestrel DROP D2AG Livestock Heat Stress Monitor is designed to help you MEASURE and MANAGE your animals’ heat stress, ensuring you MAXIMIZE your bottom line.

  • Direct readout of Temperature Humidity Index (THI) – a dairy cattle specific measurement that provides guidance for when heat stress will start to reduce milk production.
  • Also measures heat stress index, temperature, humidity and dew point for application to many types of livestock and agricultural applications.
  • The EASIEST and most accurate way to monitor and track environmental measurements critical to agriculture in almost any farm, home or transport location – wet or dry, indoors or out.
  • Easily hangs inside a barn, transport vehicle or wherever livestock are housed.
  • Horse shippers - monitor trailer temperatures and heat index from inside your truck! Know when to find shade or take a break to water your horses.
  • View data wirelessly via Bluetooth® low energy on your iOS phone or tablet with the free Kestrel LiNK app when within wireless range (up to 100’ or more line of sight.)
  • Store thousands of data points and get months of logging on a single coin-cell battery - customize logging rate, connections and alerts.
  • Rugged (drop tested to MIL-STD-810G standards), dust and waterproof (sealed to IP67 standards).
  • 5-year warranty.

Visit the Cattle Heat Stress Minisite for a more detailed look at this breakthrough tool.

Use a DROP Anywhere livestock are housed- Small, Accurate, Rugged and Waterproof

Each DROP measures just 1 x 1.8 x 2.4 inches (24 x 46 mm x 60 mm) and weighs just 1.2 ounces (34 grams). DROP loggers meet military and international standards for water, dust and shock resistance (IP-67 and MIL-STD-810G) and are conveniently equipped with a sturdy d-ring for hanging wherever needed.

DROPs Are Powered by the Kestrel LiNK App



Drop D2 Livestock Heat Stress Monitor with Mobile App

Kestrel LiNK is the free app that powers the DROP loggers. With Kestrel LiNK on your smart phone or tablet, you can view real-time readings from any DROP logger within wireless range (up to 100’ or more line of sight) via Bluetooth® low energy. Each phone or tablet can connect to up to 8 DROP loggers at the same time and store data logs from many more. Min/Max/Average readings are clearly displayed and the data log is viewable as a scrolling graph with detailed data for each logged point. The Kestrel LiNK app also allows adjustment of the logging interval and other settings as well as real-time threshold alerts. Readings can be updated as frequently as every 2 seconds and logging time and date are automatically updated whenever connected to your smart device. You can also send and share real-time and logged environmental data via email, Facebook or Twitter


  • iOS 6 installed iPhone 4s, iPad 3rd Generation, iPod Touch 5th Generation and above.
  • Android 4.3 and higher. Works with most Android devices with Bluetooth® low energy, including Samsung Galaxy, Nexus 4, Motorola Droid and other recent generation phones and tablets.

American-Made Quality and a Five-Year Warranty

Every Kestrel environmental instrument is designed and built entirely in the USA. Kestrel’s history and focus on quality and ruggedness is reflected in the DROP’s industry-leading five-year warranty. Kestrel has been building rugged environmental instruments that help people do their jobs more safely and efficiently for more than fifteen years and has built a reputation for reliability one meter at a time.

Compare All Livestock and Agriculture Models

MeasurementsDROP D2AG $995000AG $2695500AG $3195400AG $699
Temperature yes yes yes yes
Relative Humidity yes yes yes yes
Heat Stress Index yes yes yes yes
Temperature-Humidity Index (THI) yes yes yes yes
Dew Point Temp. yes yes yes yes
Wind Speed/Air Speed yes yes yes
Wind Chill yes yes yes
Wet Bulb Temp. (Psychrometric) yes yes yes
Station Pressure (Absolute Pressure) yes yes yes
Barometric Pressure yes yes yes
Altitude yes yes yes
Density Altitude yes yes yes
Volume Air Flow yes yes
Wind Direction yes yes
Crosswind / Headwind / Tailwind yes yes
Delta T yes yes
Globe Temp. yes
Naturally Aspirated Wet Bulb Temp. yes
Wet Bulb Globe Temp. (WBGT) yes
Heat Load Index (HLI) yes
Accumulated Heat Load Units (AHLU) yes

Which Kestrel DROP is right for me?

Relative Humidity  
Dew Point Temp.  
Heat Stress Index  
Barometric Pressure        
Density Altitude        
Temperature Humidity Index (THI)          
Wet Bulb Temperature (Psychrometric)          
Color Available Red, Blue, Tan Red, Blue, Tan Orange Hi-Viz Green Red, Blue, Tan Orange
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  • Battery - 1 x CR2032
  • Certificate Of Conformity (Spec Sheet)

Support Documents for all Kestrels

Product Safety and Warranty Kestrel 5000 Series

Visit our support page for FAQ's and more.

  1. Monitor Temperature to Prevent Cold Stress in Calves Monitor Temperature to Prevent Cold Stress in Calves As we head into the coldest months of the year, you might be concerned about the comfort and survival of your livestock. This is especially the case when it comes to calves. The USDA estimates that 95,000 calves die each year due to cold stress and hypothermia, which makes their survival challenging for calves born during the winter and early spring. The good news is that weather meters such as the AG Livestock DROP Environmental Monitoring Pack,