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Kestrel® 4300 construction weather tracker

Technical Specification

Physical Dimensions 126mm x 45mm x 29mm
Weight 102g
Lanyards 0.2m and 0.5m (for wrist and neck)
Case colour Lime green
Display Display type Dot matrix LCD with electro-luminescent backlighting
Display update 1 second
Data logging Programmable 2 second to 12 hour intervals, 1800 data points.
Manual data capture.
Data upload with optional PC interface.
Bluetooth models only: Integrated Bluetooth wireless data transfer with adjustable range from 5 to 30 feet.
Functions Wind speed (current, maximum and average)
Temperature
Wind Chill equivalent temperature
Relative Humidity
Heat Index
Calculated Dew Point
Wet bulb temperature
Evaporation rate
Barometric pressure
Altitude
Density altitude
Speed units kt, m/s, km/h, mph, ft/min, Beaufort Force (B)
Temperature units ºC, ºF
Pressure units mbar, inHg, hPa, psi
Altitude units m, ft
Evaporation rate units kg/m2/hr, lb/ft2/hr
Date and time display dd/mm/yy, mm/dd/yy, 12 hour, 24 hour
Performance Speed range 0.4m/s to 40m/s (0.8 to 89.0mph)
On axis accuracy ± 3% of reading or ± 0.1 m/s. (Some loss of accuracy from bearing wear may occur with sustained operation at or near maximum speed)
Off -axis response -1% @ 5°, -2% @ 10°, -3% at 15°
Calibration drift <2% after 100hrs operation at 7m/s
Speed resolution 0.1 kt, m/s, km/h, mph. 1 FPM below 1999 FPM, 10 FPM above 2000 FPM. 1 Beaufort (0 to 12)
Temperature range -29.0ºC to 70.0ºC
Temperature accuracy ±1ºC
Temperature resolution 0.1º
Wind chill accuracy ±2ºC (from wind speed and temperature)
Relative Humidity range 0% to 100%
RH resolution 1%
RH accuracy ±3% over range 15% to 90% at calibration temperature
RH calibration drift ±2% over 24 months (correctable)
Dew point accuracy ±3°C (above 20% relative humidity)
Barometric Pressure range 750 to 1100 mbar at 25ºC
Barometric Pressure resolution 0.1 mbar
Barometric Pressure accuracy ±3 mbar (from -10ºC to 60ºC)
Barometric Pressure long term drift Typically ±1 mbar per year (correctable)
Altitude range -500m to +9000m (-1500 ft to +30,000 ft)
Altitude accuracy ±30m
Altitude resolution 1m or 1ft
Evaporation rate range 0.00 to 5.00 kg/m2/hr
Evaporation rate accuracy ±0.1 kg/m2/hr Typical (±0.2 lb/ft2/hr Typical)
Evaporation rate resolution 0.01kg/m2/hr
Sensors Impeller Diameter 25mm
High precision jewel bearings
User replaceable impeller assembly
Temperature Hermetically sealed precision thermistor
Relative Humidity Silicon based capacitive sensor
Barometric pressure Monolithic Piezo-resistive silicon based sensor
Environmental Sealing Electronics enclosure IP67 [Water resistant]
Shock Drop tested
Temperature Operating range: -10ºC to 55ºC (operation over a wider range is possible with reduced display readability)
Storage range: -30ºC to 60ºC
EMC CE marked
Miscellaneous Battery 2 AAA alkaline, user replaceable
Battery Life Average expected life: 400 hours of active screen, monitoring and logging use, reduced by backlight and Bluetooth use.
Auto switch off Selectable to remain switched on, switch off 15 minutes or 60 minutes after last key press
Wind chill equivalent temperature calculation Calculated as specified by the US and Canadian weather services
Heat Index calculation Steadman, from temperature and relative humidity
Certification Wind speed, temperature, humidity and pressure measurements are tested during manufacture.
A certificate of conformity (C of C) is included with each Kestrel.
Calibration certificates are available for an additional fee.
Guarantee 5 years
The manufactures reserve the right to amend the specification and therefore the information in this document may be subject to change

View the Full Kestrel Specifications here

The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Richard Paul Russell Ltd is under license. Kestrel, Kestrel Tracker, Pocket Wind, Pocket Weather and the Kestrel logos are trademarks owned by Neilsen Kellerman. Other trademarks and trade names are those of their respective owners.