• Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com
  • Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity - ExtremeMeters.com

Kestrel DROP D2 Bluetooth Data Logger - Temperature | Humidity

Up to 20% off

0720BLU

$101.100 CLP
$101.100 CLP $126.100 CLP
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Warranty

5 year manufacturers warranty.

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45 Day Easy Returns
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Product Information

Sensor Measures

Temperature, Relative Humidity, Dew Point Temperature, and Heat Stress Index

Product Features
  • 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)

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

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)

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.

Download the Kestrel LiNK app

For LiNK enabled models only

Google Play

Download now

App store

Download now

Microsoft Store

Coming soon

Customer Testimonials

Reviews by our customers

  • Greatest service ever!

    The equipment are in new and good condition. The shipping are really fast after making a payment, they send a package in next day. I am ordering product from Thailand. To be honest after comparing price, Extreme meter LLC is the best price in product and shipping fee.

    Lalitsinee Rtnpb.
    Technician

  • Urgent need for my K2 winter expedition.

    I needed urgent for my K2 winter expedition. I was on the last min and needed the goods to be sent in Iceland. Their chat online worked 100% and I was able to add on one extra peace even after I checkout. They send with UPS same day and I had the package 3 days later here in Iceland. Extreme Meters works and has good service I recommend them.

    John Snorri
    Adventurer

  • Couldn't be more pleased

    I ordered the Kestrel 3550FW meter. Received email notifications reporting the progression of my order up to delivery, which was much quicker than I'd expected. Couldn't be more pleased with the product and service.

    Heidi
    Wildland Firefighter

  • The service was prompt and cordial.

    The service was prompt and cordial. The Kestrel is used to measure wind velocity and temperature when applying pesticides for agriculture crop production. It is also used to measure weather conditions for livestock comfort.

    Arlyn Midtgaard
    Crop Management

  • Extreme Meters answered ALL my questions

    Extreme Meters answered ALL my questions, - were totally professional - were EXTREMELY respectful to me - were a REAL pleasure to chat with ALL BEFORE I PURCHASED THEIR PRODUCTS MOST SINCERE THANK YOU AND APPRECIATED

    Michael Larkins
    Weather Enthusiast

  • My order was in my mailbox before I knew it.

    The website was easy to navigate and placing an order was effortless. Shipping was extremely quick. My order was in my mailbox before I knew it. I started to use the meter immediately; it is excellent for my needs.

    Jane Doe
    Weather Enthusiast