Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity

The Kestrel DROP is a highly durable environmental data logger.

Kestrel | SKU: 0720BLU | Barcode: 730650001132

$169.00

Color

Product variants

Shipping

Ships in 1 business day
Free Shipping in the USA
Discounted Global Shipping
Returnable until Jan 31, 2025

Measures

Temperature
Relative Humidity
Dew Point Temperature
Heat Stress Index

Includes

(1) CR2032 Lithium Battery
Instructions
Certificate Of Conformity (Spec Sheet)

Warranty

5 year manufacturers warranty.

US Manufacturing

The entire Kestrel line is designed and built in the USA. No other handheld weather meter is. Some electronic components have to be sourced overseas these days, but Kestrel buys American wherever possible. Kestrel believes US manufacturing is the only way to ensure that every Kestrel will do its job right. Kestrel believes it’s important to do its part to keep manufacturing alive and well in the US.

Government / Education Pricing Available

Sensor Specifications

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)

Description

The Kestrel DROP is a highly durable environmental data logger that is incredibly easy to employ.

Monitor and record the conditions of any environment and easily access and chart real-time and historical data on your phone or tablet. A Kestrel DROP D2 logger can be placed wherever needed to log temperature and humidity 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.

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 and 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

Payment & Security

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I love this sensor and have bought three of them and have given two away to my church. Sorry to say they are not engineers and may not, as of yet, realize their value. These sensors are bluetooth, but can store 20 days of data when in range, can be downloaded very easily to e-mail and printed out ( temp, RH
HI, DP)) after you set the interval from the APP. Flu season is just around the corner and you know ( I hope you do) that getting it right can save lives. You can bet it all that if they don't, they want see my smiling face at church!!!