Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity
0720BLU
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Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity
About the Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity
Product Overview
The Kestrel DROP D2 Bluetooth Data Logger is a compact, waterproof environmental monitoring solution that measures and logs temperature and relative humidity. Perfect for storage monitoring, environmental research, and data collection applications.
Frequently Asked Questions
What does the Kestrel DROP D2 measure?
The DROP D2 measures two key environmental parameters: temperature and relative humidity. It continuously logs this data and transmits it wirelessly via Bluetooth to your smartphone or tablet.
How do I connect the DROP D2 to my device?
Download the free Kestrel LiNK app (available for iOS and Android), enable Bluetooth on your device, and follow the in-app pairing instructions. The DROP D2 will automatically connect when in range (up to 100 feet).
How long does the battery last?
The DROP D2 runs on a standard CR2032 coin cell battery that typically lasts 2+ years with normal use. Battery life depends on logging interval and Bluetooth connection frequency.
Is the DROP D2 waterproof?
Yes! The DROP D2 is fully waterproof (IP67 rated) and even floats, making it ideal for outdoor use, marine environments, and storage areas where moisture may be present.
What is the measurement range?
Temperature: -22°F to 140°F (-30°C to 60°C)
Relative Humidity: 0% to 100% RH
Both measurements are highly accurate and calibrated to NIST standards.
How much data can it store?
The DROP D2 can store over 2,000 data points internally. When connected to the Kestrel LiNK app, data is automatically uploaded to the cloud for unlimited storage and analysis.
Can I set custom logging intervals?
Yes, you can customize logging intervals from 2 seconds to 12 hours using the Kestrel LiNK app, allowing you to balance data resolution with battery life and storage capacity.
Does it work without a smartphone nearby?
Absolutely! The DROP D2 logs data independently and stores it internally. You only need your smartphone to configure settings, view real-time data, or download logged information.
Can I set alerts and notifications?
Yes, the Kestrel LiNK app allows you to set custom high/low threshold alerts for both temperature and humidity. You'll receive push notifications when conditions exceed your specified limits.
What's included in the box?
Each DROP D2 includes the data logger unit, CR2032 battery (pre-installed), quick start guide, and access to the free Kestrel LiNK app.
Is there a subscription fee for the app or cloud storage?
No! The Kestrel LiNK app and cloud data storage are completely free with no subscription fees or hidden costs.
Can I use multiple DROP units together?
Yes, you can monitor multiple DROP data loggers simultaneously through the Kestrel LiNK app, making it perfect for monitoring different locations or environments at once.
What's the difference between the D2, D2AG, and D2HS models?
The D2 measures temperature and humidity. The D2AG adds livestock heat stress calculations. The D2HS adds heat stress index for workplace safety monitoring. Choose based on your specific application needs.
How accurate are the measurements?
Temperature accuracy: ±0.9°F (±0.5°C)
Humidity accuracy: ±2% RH
All sensors are factory calibrated and meet professional-grade standards.
Can I export my data?
Yes, the Kestrel LiNK app (available below) allows you to export data in CSV format for analysis in Excel, Google Sheets, or other data analysis software.
Features
Measures
What else is included?
Downloads | Manuals | Specifications
- Kestrel iOS LiNK App (LiNK models only) Download Here.
- Kestrel Android LiNK App (LiNK models only) Download Here.
- Manual's and Specifications
Dimensions:
Weight:If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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FAQs
What makes Kestrel meters different from other weather instruments?
Kestrel meters combine rugged durability, precision engineering, and field-proven reliability in a compact design. Built for professional use in harsh environments, they deliver accurate real-time data for weather monitoring, environmental research, and outdoor operations. Unlike consumer-grade instruments, Kestrel meters are engineered to withstand extreme conditions while maintaining measurement accuracy that professionals depend on. Kestrel instruments are trusted by meteorologists, researchers, outdoor enthusiasts, and industrial teams worldwide for their consistent performance and dependable results in the field.
What warranty coverage do your Kestrel Instruments include, and what is not covered?
Kestrel Instruments include a full 5-year limited lifetime warranty against defects in materials and workmanship under normal use. Coverage includes the meter body, display, and internal components. The warranty does not cover damage from misuse, neglect, unauthorized repair, water immersion beyond rated specifications, battery leakage, or wear from normal operation. Accidental drops, extreme temperature exposure, and chemical exposure are also excluded. For specific coverage details and warranty registration, please contact our support team or consult your product documentation.
What makes Kestrel meters suitable for professional field work?
Kestrel meters are engineered for demanding field conditions with rugged construction, precision sensors, and reliable performance in extreme environments. Built to withstand harsh weather, dust, and impact, they deliver accurate environmental data in real-time—whether you're monitoring livestock conditions, conducting agricultural research, or managing outdoor operations. Their compact design, intuitive interface, and long battery life make them practical tools for professionals who need dependable measurements without compromise.
What is your shipping policy?
We offer worldwide shipping with competitive rates calculated at checkout. Orders typically ship within 1-2 business days. Domestic US orders arrive in 3-7 business days via standard carriers; international delivery times vary by destination, typically 7-21 business days. All orders include tracking information. We partner with UPS, FedEx, and USPS to ensure reliable delivery of your precision instruments. For expedited options or specific shipping questions, contact our support team see our estimated delivery dates offered at checkout for each shipping selection.
Who manufactures Kestrel Instruments products and what is your company background?
Kestrel Instruments are manufactured by Nielsen-Kellerman, a leader in precision environmental measurement based in Pennsylvania, USA. Our partnership combines Nielsen-Kellerman's 40+ years of engineering expertise with Extreme Meters' commitment to delivering rugged, field-tested instruments to professionals worldwide. Together, we ensure every meter meets the highest standards for accuracy and durability.
What is your return policy?
We offer a 45-day return window from the date of purchase. Items must be unused, in original packaging, and in resalable condition. Return shipping is the customer's responsibility unless the item arrived damaged or defective. Once we receive and inspect your return, refunds are processed within 5-7 business days. For international orders, please contact our support team to discuss return options, as duties and shipping costs may apply. Damaged or defective items are eligible for replacement or full refund at no cost.
Customers praised this Bluetooth data logger for temperature and humidity monitoring. Reviews highlight its "perfect" performance, accuracy, and ease of use. The device stores 20 days of data, offers easy email downloads, and features user-friendly software. Shoppers found it compact and valuable for various applications.
- I love this sensor and have bought three of them
- Excellent product Easy to use and accuracy
- Nice, small equipment for temperature and humidity measurement with friendly software.
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!!!
Perfect
Perfect
Works well
Will be great during fire season. I plan on buying another
Great.
Nice, small equipment for temperature and humifity measurement with friendly software.
Excellent product Easy to use and accuracy
Is there any calibration data available for these meters? Can they be calibrated?
Hi, This is from the certificate of conformity which will be included with every Kestrel:<br /><br />"This instrument was produced under rigorous factory production control and documented standard procedures. It was individually inspected and leak tested and the functioning of its buttons, communication and firmware was verified. The accuracy of each of its primary measurements was individually calibrated and/or validated against standards traceable to the National Institute of Standards and Technology (“NIST”) or other calibrated standards in accordance with the documented standard test methods detailed below. This instrument is warrantied to perform in compliance with the published specifications for the specific measurements and features of its model number including specified typical drift since its date of manufacture."<br /><a title="Kestrel C of C" href="https://www.extrememeters.com/pages/resources">You can find the C of C for all Kestrel's here.</a> <br /><br />Also, yes this item can be recalibrated if you notice some drift in the readings after some time but that would not be required for some time.
Can the Kestrel D2 connect to my phone if it\'s placed on the outside of my RV and I\'m inside the RV? I need to see the temperature/humidity while inside but I\'m not sure if it\'ll connect through the wall.
The DROP is good for about 100 feet of unobstructed distance. I use one here which is just outside the office but it really depends on what is between you and the DROP.
I need a gauge to measure heat & humidity under plastic tunnels. Which thermometer works best?
We recommend Kestrel D2 DROP. You can leave it in place then come back and when within Bluetooth range download the readings using the Kestrel LiNK app and a Android or iOS phone or tablet. You can also view real time readings when within range when needed.
I am interested in using the Kestrel D2 out in nature to record local climate data at an experimental site. Can the battery life last more than 6 months if I record data once every hour or two even through winter temperatures (Othello, WA to Atomic City, ID, Santa Rosa Mountains near McDermitt, NV?
<strong>Here are some thoughts on battery life</strong><br />• Cold conditions, frequent logging rates, and frequent log downloads will all shorten battery life.<br />• When downloading extremely large data logs or making firmware updates, avoid using low batteries and conditions below 32°F/0°C.<br />• Estimated battery life at the baseline settings programmed into your DROP when shipped from the factory (10 min logging rate, 5 sec connection rate) and room temperature (77°F/25°C) is about 4 months. Intensive logging and connection settings (2 sec logging rate, constant connection) can reduce battery life to as little as 11 days.
Designed and Built in the USA. Kestrel Instruments are known for their accuracy, toughness, and reliability in the field. Trusted by professionals worldwide for precision weather measurement and environmental data logging.