Kestrel DROP D3 Wireless Temperature, Humidity, and Pressure Data Logger
Get More Advanced Environmental Monitoring with the DROP D3 Wireless Data Logger

Environmental Measures | |
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Barometric Pressure |
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Density Altitude |
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Dewpoint Temperature |
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Heat Stress Index |
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Pressure Trend |
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Relative Humidity |
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Temperature |
The Kestrel DROP D3 is designed to monitor and record a full suite of environmental conditions, including temperature, humidity, heat index, dew point temperature, barometric pressure, density altitude and pressure trend in a variety of indoor, outdoor and industrial applications.
Kestrel DROPs are ideal for monitoring conditions in manufacturing, transportation and shipping, shooting and hunting, facilities management, agriculture, healthcare and pharmaceutical organizations, firefighting, the military field, and recreational and in-home use. Put a DROP virtually anywhere and ensure safe conditions when you can’t be there.
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.
Log, View and Share on the Kestrel LiNK 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
Requirements:
- iOS 6 installed iPhone 4s, iPad 3rd generation or iPod Touch 5th generation – or any later iOS or hardware configuration. Will not work on iPhone 4, 3GS on 3G or any earlier iPad or iPod generation.
- Android 4.3 and higher. Works with most Android devices with Bluetooth Smart®, 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.
DROP D3 Applications:
Long-Range Shooting
Long-range shooters need some of the most precise calculations in the palm of their hands in order to make extremely accurate shots in a variety of environmental conditions. Know the effects of barometric pressure and density altitude on bullet flight.
Aviation
Constantly changing weather conditions make real-time flight decisions crucial for pilots in small aircraft and helicopters. Prevent takeoff and landing accidents by accurately measuring density altitude and adjusting flight operations depending on the area’s high or low density altitude.
Skydiving
Skydivers depend on density altitude to make decisions involving canopy size. Proficient parachutists may select smaller canopy sizes for routine jumps but may actually want to upsize to a larger canopy in high density altitudes. Higher density altitudes may also indicate a faster canopy descent.
Features
- Drop-Tested to MIL-STD-810G
- Floats
- LiNK Wireless Communication to Mobile Devices (Bluetooth low energy)*
- Pressure Sensor
- Relative Humidity Sensor
- Temperature Sensor (Patented External Isolated)
- Waterproof to IP67 (3'/1M for 30 minutes)
Includes
- Battery - 1 x CR2032
- Certificate Of Conformity (Spec Sheet)
- Instructions
Connectivity

Kestrel LiNK for iOS & Android
The Kestrel LiNK® App for iOS/Android allows you to Wirelessly connect with iOS and Android devices and remotely view real-time environmental data and receive alerts for changing conditions. Available for your Kestrel 5 Series Meter or DROP Logger, Kestrel LiNK also provides easy transfer of the Kestrel's stored data log, a clear graph of all historical data. Alerts can be customized based on temperature, heat index, wind, or other measurements. LiNK enables easy firmware updates of Kestrel 5 series meters.
Data is transmitted wirelessly via Bluetooth® Low Energy within wireless range (100' line of sight- reduced by walls and obstructions). Mobile device and Kestrel must remain within range to trigger alerts.
Learn more about what the Kestrel LiNK app can do for you.
Download from your App Store
An application that can be used to view and analyze your Kestrel data on an iOS or Android device.
Kestrel LiNK for Windows and MAC
Kestrel LiNK for Windows and MAC provides a desktop solution for data retrieval and export as well as firmware updates. Expanded connectivity options allow you to wirelessly connect LiNK enabled Kestrel 5 Series Meters, using the optional LiNK USB Dongle, or make a wired USB connection with non-LiNK Kestrel 5 Meters using the USB Data Transfer Cable.
Kestrel LiNK for Windows (Size: 10.7 MB)
Kestrel LiNK Version 1.04.04 for Windows
Kestrel LiNK for OSX (Size: 10 MB)
Kestrel LiNK Version 1.04.04 for OSX
Kestrel LiNK Devices on Ambient Weather Network

Kestrel LiNK devices, including the Kestrel 5000 series meters and Kestrel DROP data loggers, can now connect to the cloud-based Ambient Weather Network (AWN) platform for extended remote monitoring capabilities.*
You can set up your Kestrel device at any desired location that has an internet connection and then view the onsite conditions from wherever you are -- on the AWN app or AmbientWeather.net. You do not have to be onsite to remain in the know about your weather conditions.
Create a free account at AmbientWeather.net
*The Kestrel LiNK device data transfer to the AWN cloud platform functionality is specific to Android devices, as the integration with AWN and the transmission of data via the LiNK app relies on the Android platform's capabilities. The Android device must be within Bluetooth range and connected to the internet in order to transmit data from the Kestrel device to the AWN cloud platform. This allows for real-time monitoring and data analysis from virtually anywhere.

Specs
Model and SKUs: Kestrel DROP D3 - Part # 0730TAN, 0730RED, 0730BLU