Kestrel DROP D2HS Heat Stress Monitor
Know when heat and humidity are causing unsafe conditions!
Kestrel DROP D2HS Heat Stress Monitor Overview
| Environmental Measures | |
|---|---|
 | Dew Point Temperature |
 | Heat Stress Index |
 | Relative Humidity |
 | Temperature |
| Tips For Taking Accurate Measurements | |
Know your temperature and humidity conditions anywhere with the small, rugged Kestrel DROP D2 Heat Stress Monitor.
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).
- 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 Smart on your iOS or Android 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 Smart®, including Samsung Galaxy, Nexus 4, Motorola Droid and other recent generation phones and tablets.
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 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 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.
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 |
Which Kestrel Heat Stress Unit is right for me?
| MEASUREMENTS | Kestrel DROP D2HS Heat Stress Monitor | Kestrel 3000HS Heat Stress Meter | Kestrel 5400 Heat Stress Monitor | Kestrel 5400 Heat Stress Tracker Pro with Compass and LiNK + Vane Mount |
|---|---|---|---|---|
| Temperature | ✔ | ✔ | ✔ | ✔ |
| Relative Humidity | ✔ | ✔ | ✔ | ✔ |
| Dew Point Temp. | ✔ | ✔ | ✔ | ✔ |
| Heat Index | ✔ | ✔ | ✔ | ✔ |
| Wind Speed | ✔ | ✔ | ✔ | |
| Wind Chill | ✔ | ✔ | ✔ | |
| Global Temp | ✔ | ✔ | ||
| Naturally Aspirated Wet Bulb Temp | ✔ | ✔ | ||
| Wet Bulb Globe Temp (WBGT) | ✔ | ✔ | ||
| Thermal Work Limit | ✔ | ✔ | ||
| Wet Bulb Temp (Psychrometric) | ✔ | ✔ | ||
| Station Pressure (Absolute Pressure) | ✔ | ✔ | ||
| Barometric Pressure | ✔ | ✔ | ||
| Altitude | ✔ | ✔ | ||
| Density Altitude | ✔ | ✔ | ||
| Direction | ✔ | |||
| Crosswind | ✔ | |||
| Headwind / Tailwind | ✔ |
- 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
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 the App Store
KESTREL LiNK FOR IOS
An application that can be used to view and analyze your Kestrel data on an iOS device.
KESTREL LiNK FOR ANDROID
An application that can be used to view and analyze your Kestrel data on an Android device.
| 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
Certificate of Conformity Kestrel DROP Wireless Data Logger
(Size: 518.2 KB)
Model & SKUs: Kestrel DROP D2 - Part # 0720ORA
DROP Data Logger Certificates of Comformity
Certificate of Conformity Kestrel DROP Wireless Data Logger
(Size: 518.2 KB)
DROP Data Logger Instruction Manuals
Kestrel 5 Series Troubleshooting Documents
How can I submit a tax-exempt order using the website?
(Size: 1.2 MB)
LiNK (Kestrel)
How to graph weather data from LiNK CSV files
(Size: 667.5 KB)
DROP Data Logger Downloads
Kestrel DROP Firmware Change Log
(Size: 410.5 KB)
Heat Index Downloads
Kestrel Heat Index Reference Guideline - In Fahrenheit
(Size: 82.3 KB)
Korey Stringer Small Price of Survival Article 2016-09
(Size: 3.7 MB)
Kestrel LiNK Manuals and Documentation
Kestrel LiNK User Manual
(Size: 5.3 MB)
Support Documents for all Kestrels
DROP Data Logger Troubleshooting Documents
Troubleshooting a power issue with the Kestrel DROP
(Size: 504.4 KB)
Product Questions
Yes. You can always trade-in an older Kestrel, regardless of its condition, by using our Customer Trade-In Program.
... PermalinkSet 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.
... PermalinkThis 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.
... PermalinkYes. 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.
... PermalinkDROP 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
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.
... PermalinkPlease check out our tutorial:
LiNK (Kestrel)
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.
... PermalinkYou 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.
... PermalinkThe D1 can store 16330 data points. The D2 can store 8164 data points.And the D3 can store 6220 data points.
... PermalinkKestrel 5 Series Instruction Manuals
App Manual for Kestrel LiNK Legacy
(Size: 4.3 MB)
Please see the attached guidance with Exporting Issues with LiNK iOS.
... PermalinkYou 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 ... PermalinkPlease see this guidance for any power issues on the DROP
Troubleshooting a power issue with the Kestrel DROP
(Size: 504.4 KB)
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
... Permalink-
Keep Your Workers Safe With Kestrel Instruments
Construction workers brave many hazards. Working with heavy equipment, at various heights, and in dangerous environmental conditions cause injuries consistently. In 2017, a total of 259 on-the-job deaths were reported – or 14.1 deaths per 100,000 full-time construction workers. Also that year, 21,760 nonfatal injuries were reported. -
Monitoring Military Heat Stress: 4 Essential Tips for Saving Lives with the Kestrel 5400
Heat stress is a serious concern for all military personnel. Exertional heat stress can cause severe injuries and even death, but the good news is that it’s 100% preventable. The Kestrel 5400 Heat Stress Tracker in tan is the preferred choice of the military for monitoring the environmental conditions, helping to save countless lives of military personnel across the globe. -
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. -
WBGT: A Key Measurement in Preventing Heat Stress Injury
Heat stress is a condition that occurs when the body is unable to regulate its internal temperature and cool itself through sweating. Heat stress shows many symptoms and encompasses several heat-induced illnesses such as heat stroke, heat exhaustion, heat cramps and heat rashes. These conditions are more likely to occur during hot summer months, but may affect workers and athletes in various climates and conditions year round. The most common com
