Kestrel DROP D2 Heat Stress Wireless Temperature & Humidity Data Logger
(compatible with iOS & Android)

Kestrel DROP D2 Heat Stress Description

The Kestrel DROP D2 Heat Stress is an extremely durable and easy to use temperature and humidity data logger, you can access data and chart real-time using the free Kestrel Connect App and download data in .csv format

The DROP D2 HS logger is IP67 rated (30-minute submersion at 1m) and MIL-STD-810G drop tested making it ideal for remote locations, inside or outside. The Kestrel Connect App allows data to be viewed from your connected device up to 100ft away.

Each unit comes complete with a user replaceable CR2032 Coin Cell Battery (average life 300 hours) and is equipped with a sturdy D-ring for hanging wherever needed.

Kestrel DROP D2 Heat Stress Measures

• Temperature (Fahrenheit and Celsius)
• Relative Humidity (RH)
• Dew Point Temperature
• Heat Stress Index

Kestrel DROP D2 Heat Stress Features

• Bluetooth Smart (Wireless Technology)
• Data Logger
• Free Kestrel Connect App
• 24 x 46 mm x 60 mm, weighs 34 grams
• Drop-Tested, MIL-STD-810G
• IP67 Waterproof Waterproof to IP67 (3'/1M for 30 minutes)
• Lightweight & Durable
• CR2032 Coin Cell Battery (average life 300 hours)
• Kestrel Certificate of Conformity
• 5 Year Warranty Manufacturer's Warranty
• LiNK Wireless Communication to Mobile Devices (Bluetooth low energy)
• Floats
• Relative Humidity sensor

Kestrel DROP D2 Heat Stress measures

• Temperature • Humidity • Heat Index • Dew Point Temperature

Units Of Measurement

• °C, °F • % RH

Accuracy

• 0.5 °C • 2 %RH

Operational Range

• -30 to +55 °C • 0 to 100% RH

Specification Range

• -20 to +55 °C • 10 to 90%RH at 25°C

Kestrel DROP D2 Heat Stress features

• Bluetooth Low Energy (BLE) wireless communication with smart device for real-time viewing of data, data download, graphing, charting and sharing • Kestrel Connect App available at the iTunes App store & Google Play store • Share data with the Kestrel Connect App via email, text and social media • Rugged, drop tested to MIL-STD-810G standard • Accurate • Waterproof to IP67 standard • Available in red, blue and tan • 5 year warranty

 

Preliminary:

Primary Measurement	Units	Resolution	Accuracy (+/-)	Specification Range	Notes
Ambient Temperature	°F	0.1	0.9 °F		Hermetically sealed, precision thermistor mounted externally and thermally isolated (US Patent 5,939,645) for rapid response. Airflow of 2.2 mph|1 m/s or greater provides fastest response and reduction of insulation effect. Calibration drift negligible. Thermistor may also be used to measure temperature of water or snow by submerging thermistor portion into material -- ensure humidity sensor membrane is free of liquid water prior to taking humidity-based measurements after submersion.
	°C	0.1	0.5 °C	-20 to +55 °C
Relative Humidity	%RH	0.1	2 %RH	10 to 90% 25°C	Polymer capacitive humidity sensor mounted in thin-walled chamber for rapid, accurate response (US Patent 6,257,074). 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.
Heat Index	°F	0.1	TBD °F	Refer to stated ranges for temp. and relative humidity.	Calculated measurement. Perceived temperature resulting from the combined effect of temperature and relative humidity. Calculated based on NWS Heat Index (HI) tables. (Measurement range limited by extent of published tables)
	°C	0.1	TBD °C
Dew Point	°F	0.1	TBD °F	15 to 95 % RH Refer to stated ranges for temperature sensor	Calculated measurement. Temperature that a volume of air must be cooled to at constant pressure for the water vapour present to condense into dew and form on a solid surface. Can also be considered to be the water-to-air saturation temperature.
	°C	0.1	TBD °C
Bluetooth Data Upload	Utilizes Bluetooth Low Energy (BLE) module. iOS Device needed to receive uploaded data. iOS Device must be within range to receive data. (See Getting Started with your Drop for more info.)
Data Storage	Configurable within App
Response Time	Configurable within App up to 2 seconds.
Operational & Storage Temp Range	Operational: -30 °C to +55 °C, 10 TO 1200 hPa, 0 to 100% RH, some functionality may be limited or disabled at extremes. Storage: -22.0 °F to 140.0 °F | -30.0 °C to 60.0 °C.
Clock & Calendar	Time and Date is automatically updated when connected to phone
Certifications	CE certified, RoHS and WEEE compliant. Individually tested to NIST-traceable standards
Battery	One CR2032 Battery (included). The battery life will vary based on usage. For baseline conditions and settings1, the battery will last approximately 6 months. Battery life will be reduced by: a) colder conditions b) more frequent logging rates c) more frequent 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. (1Temperature = 75°F, Logging Rate = 10 minutes, Update Rate = 30 seconds)
Environmental	Sealing: Waterproof (IP67 and NEMA-6). Shock Resistance: MIL-STD-810Fg, Transit Shock, Method 516.5 Procedure IV
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.
Size & Weight	2.4 x 1.8 x 0.9 in / 6 x 4.5 x 2.3 cm, 1.2 oz / 34 g
Colour Options	Red | Blue | Tan

The manufacturer reserves the right to amend the specification and therefore the information in this document may be subject to change.

Accuracy calculated as uncertainty of the measurement derived from statistical analysis considering the combined effects from primary sensor specifications, circuit conversions, and all other sources of error using a coverage factor of k=2, or two standard deviations (2Ε).

Data Sheet
	Kestrel DROP D2 Data Sheet

User Instruction Manual
	Kestrel Connect Instructions
	Getting Started with your Kestrel DROP

Certificates of Conformity
	Sample Certificate of Conformity

Case Studies

Our following Case Studies give an overview of how this product applies to different sectors.
Please click on the title below to read the full case study.

	Agriculture
	Commercial Vehicles
	Construction
	Education
	Emergency Services
	Environmental Monitoring (with SpaceLogger Data Loggers)
	Environmental Monitoring (with Wind Systems)
	Fire Fighting & Emergency Response
	Health & Safety Monitoring
	Hunting & Fishing
	Laboratory Applications (with Data Logging)
	Manufacturing and R&D
	Marine, Ships & Harbours
	Military
	Outdoor Sports
	Scientific Research
	Sport Windsystems
	Sport Data Loggers
	Transport Safety
	Weather Monitoring