Kestrel DROP D3 Bluetooth Data Logger - Temperature | Humidity | Pressure
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Easily chart and access real-time and past records of any environment's conditions with the Kestrel DROP D3 Bluetooth Data Logger - Temperature | Humidity | Pressure, available to view on your mobile or tablet device.
A Kestrel DROP D3 logger can be placed wherever needed to log temperature, humidity and pressure with the data logs retrieved wirelessly and automatically to the Kestrel Connect app when within range (up to 100ft.). Kestrel DROP data loggers are designed to be used anywhere you need to track environmental conditions. DROP loggers meet military and international standards for water, dust and shock resistance (IP-67-30 minute submersion at 1m and MIL-STD-810G drop tested) and are equipped with a sturdy D-ring for hanging wherever needed.
Measures & Records:
- Temperature
- Relative Humidity
- Station Pressure
- Density Altitude
- Pressure Trend
- Heat Stress
- Dew Point
All you need is a DROP and a Smartphone with the free Kestrel LiNK app!
Kestrel LiNK is the free app that powers the DROP loggers. With Kestrel Connect, you can view real-time readings from any DROP logger within wireless range (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 log is viewable as a scrolling graph with detailed data for each logged point. The 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. Send and share real-time and logged environmental data via email, Facebook or Twitter.
DROP D1-D3 Data Points:
DROP D1: Data Points: 13064
- Logging every 2 seconds - Fills up after 7.5 hours
- Logging every 10 minutes - Fills up after 90.7 days
- Logging every 2 hours - Fills up after 544 days
DROP D2: Data Points: 8165
- Logging every 2 seconds - Fills up after 4.5 hours
- Logging every 10 minutes - Fills up after 56.7 days
- Logging every 2 hours - Fills up after 340 days.
DROP D3: Data Points: 6220
- Logging every 2 seconds: Fills up after 3.4 hours
- Logging every 10 minutes - Fills up after 43.2 days
- Logging every 2 hours - Fills up after 259 days
Battery Life:
- The battery life will vary based on usage.
- For baseline conditions and settings*, the battery will last approximately 6 months. *Temp = 75°F, Logging Rate = 10 Minutes, Update Rate = 30 seconds.
- Battery life will be reduced by:
- Colder conditions
- More frequent logging or update rates
- Downloads of large data logs (or firmware updates) are best completed with a fresh battery and in temperatures above 10°C / 50°F.
Requirements:
- iOS 6 installed iPhone 4s, iPad 3rd generation, iPod Touch 5th generation and above.
- Android 4.2 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.
| MEASUREMENTS | D1 | D2 | D2HS | D2AG | D3 | D3FW |
|---|---|---|---|---|---|---|
| Temperature | Yes |
Yes | Yes | Yes | Yes | Yes |
| Relative Humidity | Yes | Yes | Yes | Yes | Yes | |
| Dew Point Temp. | Yes | Yes | Yes | Yes | Yes | |
| Heat Stress Index | Yes | Yes | Yes | Yes | Yes | |
| Barometric Pressure | Yes | Yes | ||||
| Density Altitude | Yes | |||||
| Temperature Humidity Index (THI) | Yes | |||||
| Wet Bulb Temperature(Psychrometric) | Yes | |||||
| Color Available | Red, Blue, Tan | Red, Blue, Tan | Orange | Hi-Viz Green | Red, Blue, Tan | Orange |
| Measurement |
|---|
Kestrel D1 - D3 Sensor Specifications
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) |
Customer Reviews
Love the data we get from meters. I use it at home and in the field chasing storms.
Drop D3 is a lovely little gadget. The Kestrel Link app also seems to work well with my iPhone X. Service from Extreme Meters was first class. Really fast delivery to the UK - just wish there was a less expensive carriage option even it was much slower. £30 is quite a lot (25% of the product cost)
Accurate and reliable. Perfect seller.
I like to cowboy camp on backpacking adventures, and the Kestrel Drop lets me confidently camp without setting up a shelter and worrying about morning condensation. There is no guess work on the temperature and dew point at my exact location. I also find it easier to assess my gear choices I made for the trip when I have a log of the temperature...
Excellent device, performs as advertised
