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Kestrel D3

Kestrel D3

DROP 3 Wireless Environmental Data Logger
List Price: $174.99
Our Price: $157.95
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The Kestrel DROP D3 is the world's easiest-to-use rugged waterproof environmental data logger. Use the Kestrel DROP D3 to monitor temperature, humidity, dew point, heat index, station pressure and density altitude for research, safety, athletics & outdoor sports, education & classroom applications, facility management, farm & agriculture, firefighting, personal use, outdoor events and more. The DROP allows you to monitor and record vital conditions of any environment; indoors or outdoors, wet or dry.

Easily access and chart real-time and historical data on your iPhone, iPad, Android or other mobile devices via Bluetooth by using the free Kestrel LiNK app. Store more than 6,000 data points and get months of logging. Customize logging interval and other settings as well as real-time threshold alerts. Min/Max/Average readings are clearly displayed and the log is viewable as a scrolling graph with detailed data for each logged point. Data logs are automatically retrieved wirelessly to the Kestrel LiNK app when within range (up to 100 feet or more line of sight). Readings can be updated as frequently as every two (2) seconds and logging time and date are automatically updated whenever connected to your mobile device. See, save and share data from multiple Kestrel DROP loggers that may be viewed on one mobile device. You can also send and share real-time and logged environmental data via email, Facebook or Twitter.

DROP data 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.

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.

  • Temperature
  • Dew Point
  • Heat Stress Index
  • Humidity
  • Relative Humidity
  • Station Pressure
  • Density Altitude
  • Pressure Trend
  • Bluetooth Smart (Wireless Technology)
  • Data Logger
  • Drop-Tested, MIL-STD-810G
  • IP67 Waterproof
  • Lightweight & Durable
  • Five-year warranty from the manufacturer
  • Made in the USA
  • Bedroom
  • Basement
  • Attic
  • Kennel
  • Barn
  • Hatchery
  • Shipping Container
  • Airplane
  • Ship
  • Transport Goods
  • Warehouse
  • Factory
  • Humidor
  • Safe
  • Refrigerator
  • Field
  • Winery
  • Forest
  • Laboratory Classroom
  • Training Center
  • Kitchen
  • Silo
  • Shooting Range
  • Construction Site
  • HVAC System
Kestrel DROP Who Uses
  Kestrel Drop 1 Kestrel Drop 2 Kestrel Drop 2 Heat Stress Kestrel Drop 3
  D1 D2 D2HS D3
  Temperature YES YES YES YES
  Humidity NO YES YES YES
  Heat Index NO YES YES YES
  Heat Stress NO NO YES NO
  Dew Point Temperature NO YES YES YES
  Station Pressure NO NO NO YES
  Density Altitude NO NO NO YES
  Pressure Trend NO NO NO YES
  • Temperature
    • Accuracy: 0.9F (0.5C)
    • Resolution: 0.1F (0.1C)
    • Range: 14 to 131F (-10 to 55C)
  • Humidity
    • Accuracy: 2% RH
    • Resolution: 0.1% RH
    • Range: 10% to 90% RH at 77F (25C)
  • Barometric Pressure
    • Accuracy: 0.044 inHg at 77F, 20.67-32.48 inHg (1.5 mbar at 25C, 700-1100 mbar)
    • Resolution: 0.01 inHg (0.1 mbar)
    • Range: 20.67 to 32.48 inHg at 77F (700 to 1100 mbar at 25C)
  • Dew Point
    • Accuracy: 3F (1.8C)
    • Resolution: 0.1F (0.1C)
    • Range: 10% to 90% RH at 77F (25C)
  • Heat Index
    • Accuracy: 5F (2.6C)
    • Resolution: 0.1F (0.1C)
    • Range: 10% to 90% RH at 77F (25C)
  • Density Altitude
    • Accuracy: 82.0 feet (25.0 meters)
    • Resolution: 0.1 feet (0.1 meters)
    • Range: 20.67 to 32.48 inHg over 50 to 131F at 10% to 90% RH (700 to 1100 mbar over 10 to 55C at 10% to 90% RH)
  • Operational Range
    • Temperature: 0 to 140F (-18 to 60C)
    • Humidity: 0 to 100% RH
    • Barometric Pressure: 10-1200 hP
  • Data Storage: 6220 data points
  • Connectivity: Bluetooth Low Energy (BLE)
  • Logging Rate: 2 seconds to 12 hours
  • Storage Temperatures: -22 to 140F (-30 to 60C)
  • Shock Resistance: MIL-STD-810G, Transit Shock, Method 516.5 Procedure IV (4 foot drop test)
  • Water Resistance: IP67 and NEMA-6 (30 minute submersion at 1 meter, 3.3 ft)
  • Compliance: CE certified, FCC, IC tested, RoHS and WEEE compliant
  • Source: Designed and manufactured in USA. Complies with Regional Value Content and Tariff Code Transformation requirements for NAFTA Preference Criterion B
  • Power requirements: 1 user-replaceable CR2032 lithium coin cell battery (included)
  • Battery life: ±2,880 hours, depending on temperature and use

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Firmware: iOS versions 8 and later
Hardware: iPhone 4s onward, iPad 3rd generation onward, iPod Touch 5th generation onward

Firmware: Android 4.3 and later
Hardware: Most Android devices with Bluetooth Smart, including Samsung Galaxy, Nexus 4, Motorola Droid and other recent generation phones and tablets

  • Size: 2.40" x 1.80" x 0.90" (60mm x 45mm x 23mm)
  • Weight: 1.2 oz (34 g)


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