Kestrel DROP D2 Wireless Temperature & Humidity Data Logger

$99.00

Wirelessly know and log your temperature and humidity conditions anywhere.

Works with AWN, the Ambient Weather Network
Availability: In stock
SKU
0720
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 Know your temperature and humidity conditions anywhere with the small, rugged Kestrel DROP D2 Temperature and Humidity Logger

The Kestrel DROP syncs with your smartphone and tablet.

  • The EASIEST way to monitor and track temperature, humidity, heat index and dew point in almost any environment – wet or dry, indoors or out
  • View data wirelessly via Bluetooth® low energy on your iOS phone or tablet with the free Kestrel LiNK app 
  • Store thousands of data points and get months of logging on a single coin-cell battery - customize logging rate, connections and alerts
  • See, save and share data from multiple DROPs with just one phone or tablet –
    • iOS 6 installed iPhone 4s, iPad 3rd generation or later.
    • 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. 

Kestrel DROP D2 Wireless Temperature & Humidity Data Logger Overview


Environmental Measures
Dew Point Temperature
Heat Stress Index
Relative Humidity
Temperature
Tips For Taking Accurate Measurements

A Kestrel DROP is the world’s easiest-to-use rugged environmental data logger. Available in three models – the Kestrel DROP D1 Temperature Logger, the Kestrel DROP D2 Temperature and Humidity Logger, and the Kestrel DROP D3 Temperature, Humidity and Pressure Logger – all three models allow you to monitor and record the conditions of any environment and easily access and chart real-time and historical data on your phone, tablet or other smart device.

The Kestrel DROP D2 data logger can be placed wherever needed to log temperature and humidity with the data logs retrieved wirelessly and automatically to the Kestrel LiNK app when within wireless range(up to 100’ or more line of sight).


Use a DROP Anywhere - 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

DOWNLOAD KESTREL LiNK FOR iOS

DOWNLOAD KESTREL LiNK FOR ANDROID

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, 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

Kestrel DROP can save your cigar collection

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 Customer Feedback:

The Kestrel DROP D2 and D3 are absolutely the best kept secret in the cigar industry! In the high tech world we live in, I am now able to keep a vigilant eye over my investment by remotely monitoring the environmentals of my humidor via a simple app on my iPhone. Having the ability to set alerts when humidity and temperature drop or go above ideal conditions is invaluable.  This is a MUST HAVE accessory for anyone with a humidor!


Where Can a Kestrel DROP Be Used?

  • Bedroom
  • Basement
  • Attic
  • Kennel
  • Barn
  • Hatchery
  • Greenhouse
  • Shipping Container
  • Airplane
  • Ship
  • Warehouse
  • Factory
  • Humidor
  • Safe
  • Refrigerator
  • Field
  • Winery
  • Forest
  • Laboratory
  • Classroom
  • Training Center
  • Kitchen
  • Silo
  • Shooting range
  • Construction site
  • HVAC System

Which Kestrel DROP is right for me?

MEASUREMENTS DROP D1 DROP D2 DROP D2HS DROP D2AG DROP D3 DROP D3FW
Temperature
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
  Buy Now Buy Now Buy Now Buy Now Buy Now Buy Now
  • Drop-Tested to MIL-STD-810G
  • Floats
  • LiNK Wireless Communication to Mobile Devices (Bluetooth low energy)*
  • Relative Humidity Sensor
  • Temperature Sensor (Patented External Isolated)
  • Waterproof to IP67 (3'/1M for 30 minutes)
  • Battery - 1 x CR2032
  • Certificate Of Conformity (Spec Sheet)
  • Instructions
SENSORS
SENSORS ACCURACY (+/-) RESOLUTION SPECIFICATION RANGE NOTES
AmbientTemperature 0.9 °F
0.5 °C
0.1 °F 0.1 °C 14 to 131°F
-10 to 55 °C
Airflow of 2.2 mph|1 m/s or greater provides fastest response and reduction of insolation effect. For greatest accuracy, avoid direct sunlight on the temperature sensor and prolonged sunlight exposure to the unit in low airflow conditions. Calibration drift is negligible for the life of the product. For further details, see Battery Operational Temperature Limits.
Relative Humidity 2%RH 0.1 %RH 10 to 90% 25°C noncondensing To achieve stated accuracy, unit must be permitted to equilibrate to external temperature when exposed to large, rapid temperature changes and be kept out of direct sunlight. Calibration drift is typically less than ±0.25% per year.
Pressure 1.5 hPa|mbar
0.044 inHg
0.022 PSI
0.1 hPa|mbar
0.01 inHg
0.01 PSI
25°C/77°F
700-1100 hPa|mbar
20.67-32.48 inHg
10.15-15.95 PSI
Monolithic silicon piezo-resistive pressure sensor with second-order temperature correction. Between 1100–1600 mbar, unit will operate with reduced accuracy. Sensor may not operate above 1600 mbar and can be damaged above 6,000 mbar or below 10 mbar. Calibration drift is negligible for the life of the product.

CALCULATED MEASUREMENTS
MEASUREMENT ACCURACY (+/-) RESOLUTION SENSORS EMPLOYED
Density Altitude 226 ft
69 m
1 ft 1 m Temperature, Relative Humidity Pressure
Dew Point 3.4 °F
1.9 °C
15-
95% RH. Refer to Range for Temperature Sensor
0.1 °F
0.1 °C
Temperature, Relative Humidity
Heat Index 7.1°F
4.0°C
0.1 °F
0.1 °C
Temperature, Relative Humidity
THI (NRC) 1.5 °F
0.8 °C
0.1 °F
0.1 °C
Temperature, Relative Humidity
THI (Yousef) 2.3 °F
1.3 °C
0.1 °F
0.1 °C
Temperature, Relative Humidity
Wet Bulb Temperature - Psychrometric 3.2 °F
1.8 °C
0.1 °F
0.1 °C
Temperature, Relative Humidity Pressure
ADDITIONAL PRODUCT INFO
Response Time & Display Update Display updates every 1 second. After exposure to large environmental changes, all sensors require an equilibration period to reach stated accuracy. Measurements employing RH may require longer periods particularly after prolonged exposure to very high or very low humidity. WBGT requires about 8 minutes to reach 95% accuracy and about 15 minutes to reach 99% accuracy after exposure to large environmental changes.
Data Storage Logged history stored for every measured value. Auto-store interval settable from 2 seconds to 12 hours*, overwrite on or off. D1: >13,000 data points, D2: >7,000 data points, D3: >6,000 data points.
Bluetooth® Data Connect Option Wireless range up to 100ft|30m. Compatible with Kestrel LiNK app for iOS (model 4s and later) and select Android products (Android 4.3 and higher) (See website for complete list of compatible 3rd party apps).
Certifications CE certified, RoHS, FCC, IC tested and WEEE compliant. Individually tested to NIST-traceable standards.
Origin Designed and manufactured in the USA from US and imported components. Complies with Regional Value Content and Tariff Code Transformation requirements for NAFTA Preference Criterion B.
Battery User-replaceable CR2032 (included).
Shock Resistance MIL-STD-810g, Transit Shock, Method 516.6 Procedure IV; unit only; impact may damage replaceable impeller.
Sealing Waterproof (IP67 and NEMA-6)
Battery Operational Temperature Limits 0° F to 140 ° F | -18 °C to 60°C Measurements may be taken beyond the limits of the operational temperature range of batteries by maintaining the unit within the operational range and then exposing it to the more extreme environment for the minimum time necessary to take reading.
Storage Temperature -22.0 °F to 140.0 °F | -30.0 °C to 60.0 °C.
Size & Weight 2.4 x 1.8 x 0.9 in | 6 x 4.5 x 2.3 cm 1.2oz | 34g (Lithium battery included)

DROP Data Logger Certificates of Comformity

Kestrel DROP Wireless Environmental Data Logger specification chart


Model & SKUs: Kestrel DROP D2 - Part # 0720TAN, 0720RED, 0720BLU


DROP Data Logger Certificates of Comformity

Kestrel DROP Wireless Environmental Data Logger specification chart

DROP Data Logger Instruction Manuals

Getting Started with Kestrel DROP Wirelss Environmental Data Loggers

Kestrel 5 Series Troubleshooting Documents

Here is guidance on how to submit an order through the website for Tax Exempt customers.

LiNK (Kestrel)

This tutorial will show you how to create a graph of the data that you exported from your Kestrel 5000 series or Kestrel DROP using one of the Kestrel LiNK applications.

DROP Data Logger Downloads

Shows the latest firmware changes with the Kestrel DROP product line.

Here is some guidance on how to solve some power issues with the DROP

Kestrel LiNK Manuals and Documentation


Support Documents for all Kestrels

Product Safety and Warranty Kestrel 5000 Series

DROP Data Logger Troubleshooting Documents

Here is something to try if you DROP all of a sudden will not power up, even with a fresh battery.

Product Questions

Set the logging rate to the max, 12 hours. You could set the data refresh rate to its max, 1 minute, but that will only have an effect when connected to the DROP. Also if you connect to the DROP in colder weather, this will affect battery life more than in warmer temperatures. If possible, warm up the DROP before doing a data upload to Kestrel LiNK to help with battery life.

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This is really just personal preference. If the DROP name is related to its location or purpose, then obviously changing the name would be helpful each time.

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Yes. Once you make the settings to the DROP (custom name, logging rate, data refresh rate), those settings stay with the DROP itself. This means that all anyone else would have to do is download the Kestrel LiNK) app from the Google or iTunes App store and connect to the DROP to access.

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DROP D1

  • Data Points: 16330
  • Logging every 2 seconds - Fills up after 9 hours
  • Logging every 10 minutes - Fills up after 113 days
  • Logging every hour - Fills up after 680 days

DROP D2

  • Data Points: 8164
  • Logging every 2 seconds - Fills up after 4.5 hours
  • Logging every 10 minutes - Fills up after 56.7 days
  • Logging every hour - Fills up after 340 days

DROP D2 AG

  • Data Points: 7257
  • Logging every 2 seconds - Fills up after 4 hours
  • Logging every 10 minutes - Fills up after 50 days
  • Logging every hour - Fills up after 302 days

DROP D3

  • Data Points: 6220
  • Logging every 2 seconds - Fills up after 3.5 hours
  • Logging every 10 minutes - Fills up after 43 days
  • Logging every hour - Fills up after 259 days

DROP D3 Fire

  • Data Points: 6531
  • Logging every 2 seconds - Fills up after 3.6 hours
  • Logging every 10 minutes - Fills up after 45 days
  • Logging every hour - Fills up after 272 days
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This is dependent on a setting for the DROP in the Manage Data Log section. If you go to Manage->Manage Data Log, you will notice a Wrap Log toggle button. If the Wrap Log toggle button is slid to the right (indicates ON), then the oldest logged data will be overwritten when the data logger is full. If the slide is to the left (indicates OFF), then no more data will be collected when the data logger becomes full.

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Please check out our tutorial:

LiNK (Kestrel)

Setting up Alert Services on Kestrel LiNK Legacy Application for Multiple People

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The Stats page shows the data that is currently stored in the logger on the DROP. Currently you need to disconnect and reconnect to acquire more data, so the Refresh is useful only during an active download. You can hit the Refresh button to populate more Stats as they are in the process of being downloaded to the application.

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You must disconnect and then reconnect the DROP to get any additional logged data uploaded into the program. You can do this by closing and re-opening the program as long as Device Power Saving is turned ON.

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The D1 can store 16330 data points. The D2 can store 8164 data points.And the D3 can store 6220 data points.

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Kestrel 5 Series Instruction Manuals

Instructions for the use of the Kestrel LiNK Legacy App - Please note: this app is no longer supported and customers should instead use the new Kestrel LiNK app

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You can obtain a new battery door from our site here: Battery Doors ... Permalink

Our DROPs use the standard CR2025 battery coin cell which can provide 3-4 months of battery life. If you want, the DROPs can use a CR2050 battery which can get you an extra month or two of battery life, however you will need to change the battery door and purchase a Kestrel 123 battery door for the DROP to make it fit

K123 Battery Door ... Permalink

Please see this guidance for any power issues on the DROP

Here is something to try if you DROP all of a sudden will not power up, even with a fresh battery.

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No the DROP will not connect with the Kestrel LiNK Ballistics app. The app does not have a ballistic solver in it so you need to have a 2700 or 5700 in order for it to work correctly. However there are other 3rd party apps that will work with the DROP. Here is a list of them: 3rd Party Apps

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  2. Woodworking 101: Combating Temperature and Humidity Issues with Kestrel Weather & Environmental Meters Woodworking 101: Combating Temperature and Humidity Issues with Kestrel Weather & Environmental Meters When you’re knee-deep in a woodworking project such as flooring installation, humidity and temperature can impact the project before and after installation. Wood is a hygroscopic material, meaning it attracts water from its surroundings. It is also affected by the temperature where the size of the wood can expand or contract based on the ambient conditions. With an array of Kestrel Instruments to use for spot-checks or to leave on-site, you can m
  3. The Need for Environmental Monitoring in Scientific Studies The Need for Environmental Monitoring in Scientific Studies Knowing and understanding the environment around us allows us to preserve it, protect it, and even learn from it. Technology makes a major impact on how we apply our understanding to scientific studies, especially with environmental monitoring. With the help of the Kestrel 5500 and DROPs, scientists ranging from ecologists to hydrologists can improve their scientific studies with reliable, accurate data.
  4. Using Kestrel DROP to Measure Heat Index for Horses Using Kestrel DROP to Measure Heat Index for Horses When it's hot and humid, humans aren’t the only species that suffer from overheating. Horses and other livestock feel the discomfort of heat and humidity, and measuring heat index with Kestrel DROP D2AG can help protect your horses.
  5. Kestrel DROPs Used as Research Tool in Air Quality Study Kestrel meters and data loggers are used in a variety of research programs and initiatives. When it comes to collecting data, accuracy is critical to maintaining research integrity. Kestrel environmental monitoring tools are preferred by researchers for their accuracy, reliability, and durability in the lab and in the field.
  6. Kestrel Team Trains PA Dog Law Enforcement Officers Kestrel Team Trains PA Dog Law Enforcement Officers Kestrel team members Katie Godfrey, Senior Global Account Executive, and Madeline Delaney Product Manager, trained several dog wardens of the Pennsylvania Bureau of Dog Law Enforcement on features and operation of the Kestrel DROP D2 Temperature & Humidity Data Logger. The PA Bureau of Dog Law Enforcement is responsible for ensuring the welfare of breeding dogs and puppies in commercial breeding kennels. Also, the bureau regulates activities