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Kestrel 4000NV with Night Vision screen

by Kestrl
Kestrel 4000NV with Night Vision screen
Olive greenOlive green
Desert tanDesert tan
SKU: Kestrel-0840NV

Nielsen Kellerman

Kestrel 4000NV with Night Vision screen

Pocket Weather Tracker

The Kestrel 4000 Night Vision model offers the same features as the regular 4000 but with a visible red backlight - which helps users to sustain natural night vision. The NV's red backlight preserves the natural night vision of users such as military personnel and pilots. This unit's red backlight is also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations.

$ 239.00
$259.00 Save 8%
8

Color:

Kestrel Weather Instruments

1000

2000
kestrel 2000 pocket thermo wind meter

3000
kestrel 3000 pocket weather meter

2500

3500
kestrel 3000 pocket weather meter

4000
kestrel 4000 Pocket Weather Tracker

New Kestrel Night Vision Models

4000NV
Kestrel 4000 Night Vision Model
3500NV
Kestrel 3500 Night Vision Model
2500NV
Kestrel 3000 Night Vision Model

The Kestrel Night Vision models offer the same features as the regular kestrels but with an olive drab case with a visible red backlight - which helps users to sustain natural night vision. The NV’s red backlight preserves the natural night vision of users such as military personnel and pilots. This unit’s red backlight is also much dimmer than a standard backlight, making it more difficult to detect with the naked eye in night operations. The Night Vision model is only available for the 2500, 3500 & 4000.

Measurments

The Kestrel 1000 - 4000 models do not measure wind direction, please see the Silva Polaris Compass if interested in measuring wind direction. The Kestrel Tactical sheath sold for the Kestrels fits the compass and a Kestrel Weather Meter.

Kestrel 1000 Kestrel 2000 Kestrel 3000 Kestrel 2500 Kestrel 3500 Kestrel 4000
Wind Speed
kestrel 1000; wind speed
kestrel 2000; wind speed
kestrel 3000; wind speed
Max Wind Speed
kestrel 1000; Max Wind Speed
kestrel 2000; max wind speed
kestrel 3000; max wind speed
AVG Wind Speed
kestrel 1000; AVG Wind Speed
kestrel 2000; avg wind speed
kestrel 3000; avg wind speed
Temperature
kestrel 2000; temperature
kestrel 3000; temperature
Wind Chill
kestrel 2000; wind chill
kestrel 3000; wind chill
Relative Humidity
kestrel 3000; relative humidity
 
Heat Stress Index
kestrel 3000; heat stress index
 
Dew Point
kestrel 3000; dew point
 
Wet bulb  
Barometric Pressure
Altitude
Density Altitude    

Features

Kestrel 1000 Kestrel 2000 Kestrel 3000 Kestrel 2500 Kestrel 3500 Kestrel 4000
Backlit Display
kestrel 2000; wind speed
kestrel 3000; wind speed
Waterproof & Floats
kestrel 1000; Max Wind Speed
kestrel 2000; max wind speed
kestrel 3000; max wind speed
Hard Cover
kestrel 1000; AVG Wind Speed
kestrel 2000; avg wind speed
kestrel 3000; avg wind speed
optional
Clock

Computer Interface

optional
Pressure Trend
Data Storage  
Two-Year Warranty
kestrel 1000; wind speed
kestrel 2000; temperature
kestrel 3000; dew point


Wind Speed Functions

Kestrel 1000, Kestrel 2000, Kestrel 3000, Kestrel 2500, Kestrel 3500, Kestrel 4000

Modes:
Kestrel 1000, 2000, 3000, 2500, 3500:
Moving 3-second average (Current wind speed)
Maximum 3-second gust since power on (MAX)
Average since power on (AVG)
Kestrel 4000:
Current
Min/Max/Avg (from stored data)
Chart (up to 250 stored data points)
3 user screens (simultaneously shows 3 current measurements)
Date&Time screen

Units:
Knots (KT)
Meters per second (M/S)
Kilometers per hour (KM/H)
Miles per hour (MPH)
Feet per minute (FPM)
Beaufort force (".F")

On-Axis Accuracy:
Greater of +/- 3% of reading or +/- least significant digit.

Off-Axis Response:
-1% @ 5o, -2% @ 10o, -3 @ 15o

Calibration Drift:
<2% after 100 hours use at 7 M/S [~14 KT, 25 KM/H, 16 MPH or 1400 FPM].

Minimum Speed:
0.3 M/S [~0.6 KT, 1.0 KM/H, 0.7 MPH or 59.0 FPM].

Maximum Speed:
40 M/S [~78 KT, 7,877 FPM, 144 KM/H, 89 MPH ].

Temperature and Wind Chill Functions

Kestrel 2000, Kestrel 3000, Kestrel 2500, Kestrel 3500, Kestrel 4000

Modes:
Temperature
Wind chill

Units:
Degrees centigrade (oC)
Degrees fahrenheit (oF)

Temperature Range:
Min: -29oC [-20oF].
Max: 70oC [158oF].

Humidity Functions

Kestrel 3000, Kestrel 3500, Kestrel 4000

Modes:
Relative humidity
Heat index
Dew point temperature

Units:
Percent (%)
Degrees centigrade (oC)
Degrees fahrenheit (oF)

Accuracy:
Relative Humidity: +/- 3.0%
Heat index: +/- 3.0oC
Dew point: +/- 2.0oC

Humidity Sensor Response Time:
1 minute for most conditions

Humidity Sensor Calibration:
May be field or factory calibrated

Barometric Pressure Functions

Kestrel 2500, Kestrel 3500, Kestrel 4000

Modes:
Barometric Pressure

Units:
hectoPascal (hPa)
inches mercury (inHg)
millibar (mb)

Accuracy:
+/- 3 hPa (between -10oC and 60oC)

Calibration Drift:
+/- 1 hPa over 12 months (can be field calibrated)

Pressure Range:
Min: 870.0 hPa [25.70 inHg]
Max: 1080.0 hPa [31.90 inHg]

Altitude Functions

Kestrel 2500, Kestrel 3500, Kestrel 4000

Modes:
Altitude
Kestrel 4000 : Density altitude

Accuracy:
+/-
30 meters (at standard atmospheric conditions)

Units:
Meters (M)
Feet (Ft)

Altitude Range:
Min: -500 M [-1500 Ft]
Max: 9000 M [30,000 Ft]

Memory Capabilities

Kestrel 4000

Memory:
Can store up to 480 or 2000 memory points (depending on model). Data can also be uploaded to a computer (with optional interface).

Store Rate (data can be stored at any of the following intervals):

2 sec
5 sec
10 sec
20 sec
30 sec
1 min
2 min
5 min
10 min
20 min
30 min
1 hr
2 hr
5 hr
12hr

Display

Kestrel 1000, Kestrel 2000, Kestrel 3000, Kestrel 2500, Kestrel 3500, Kestrel 4000

Type:
Kestrel 1000: reflective 31/2 digit LCD with 9mm (0.36 in) digit height
Kestrel 2000, 3000, 2500, 3500 : (Backlight) reflective 31/2 digit LCD with 9mm (0.36 in) digit height
Kestrel 4000: Dot matrix screen with variable digit size

Update:
1 second

Range and Resolution:

Units Range Resolution

Knots

0.1 0.6 to 78
Meters per Second 0.1 0.3 to 40
Kilometers per Hour 0.1 1.0 to 144
Miles per Hour 0.1 0.7 to 89
Feet per Minute 1 59 to 7877
Beaufort Force 1 1 to 130
Celsius 0.1 -29 to 70
Fahrenheit 0.1 -20 to 158
Percent Humidity 1 5 to 95
Meters 1 -500 to 9000
Feet 3 -1500 to 30000
Hectopascal (mb) 0.1 870.0 to 1080.0
Inches Mercury 0.01 25.70 to 31.90

Temperature Limitations:
Kestrel 1000, 2000, 3000, 2500, 3500 : Operation from -15oC to 50oC [5oF to 122oF].
Below -15oC [5oF] the display fluid will freeze. Above 50oC, the display will turn black.
This is temporary and the display will function properly when unit is returned to normal temperature
Accurate readings may be taken by keeping the unit warmer than -15oC [5oF], or cooler than 50oC [122oF],
and exposing it for the minimum time necessary to take a reading (less than one minute).
Kestrel 4000: Operation from -20oC to 60oC [-4oF to 140oF].
Below -20oC [-4oF], accurate readings may be taken by keeping the unit warmer than -20oC [-4oF] and exposing it for
the minimum time necessary to take a reading (less than one minute).

Auto Shutdown:
Kestrel 1000, 2000, 3000, 2500, 3500 : 45 minutes after last key press.
Kestrel 4000: 15 mins after last key  press (can be disabled)

Environmental

Kestrel 1000, Kestrel 2000, Kestrel 3000, Kestrel 2500, Kestrel 3500, Kestrel 4000


Sealing:
E
lectronics enclosure IP67 - water resistant to 1 m. [3 ft.].

Shock:
Drop tested to 2 m. [6 ft.].


Storage Temperature:
Kestrel
1000, 2000, 2500, 3500 : Prolonged exposure to temperatures below -20oC [-4F] or
above 80oC [176oF] may cause permanent damage.
Kestrel
3000: -40oC to 60oC [-40oF to 140oF].
Kestrel 4000: -30oC to 60oC [-22oF to 140oF].

Floats:
Kestrel 1000, 2000, 3000, 2500, 3500

Physical

Kestrel 1000, Kestrel 2000, Kestrel 3000, Kestrel 2500, Kestrel 3500, Kestrel 4000

Buttons:
Kestrel 1000, 2000, 3000, 2500, 3500
Three sealed tactile rubber buttons control all functions.
Kestrel 4000:
8 buttons
Dimensions:

Kestrel 1000, 2000, 3000, 2500, 3500
unit: 122 x 42 x 20 mm (4.8 x 1.7 x 0.8 in.)
case: 122 x 46 x 26 mm (4.6 x 1.8 x 1.1 in.)
lanyard: 68 cm. [27 in.].

Kestrel 4000:
unit: 127 x 45 x 28 mm. [5 x 1.8 x 1.1 in.]
pouch: 160 x 76 mm. [6.3 x 3 in]
lanyard x 2: 58 cm. [23 in.], 23 cm [9 in]

Weight:

Kestrel 1000, 2000, 3000, 2500, 3500
unit: 65 g. [2.3 oz.]
slip-on case: 37 g. [1.3 oz.].

Kestrel 4000:
unit: 102 g. [3.6 oz.]
soft carry pouch: 7 g. [0.2 oz.].

Impeller: 25 mm [1 in.] diameter, sapphire bearings, light weight, user-replaceable impeller/housing
assembly.
Temperature sensor:
Kestrel 2000, 3000, 2500, 3500, 4000: Hermetically sealed precision thermistor.
Humidity sensor:
Kestrel 3000, 3500, 4000: Solid state silicone capacitance sensor.
Pressure sensor:
Kestrel 2500, 3500, 4000: Monolithic Silicon Piezoresistive sensor.
Case:
Kestrel 1000, 2000, 3000, 2500, 3500
Rigid plastic slip-on case prevents damage to display and moving parts
Kestrel 4000:
Soft carry pouch
Battery:
Kestrel 1000, 2000, 3000, 2500, 3500
User-replaceable CR2032 coin cell
Kestrel 4000:
User-replaceable two AAA
Battery Life:
Kestrel 1000
: 400 hrs  (40,000+ readings)
Kestrel 2000
: 800 hrs  (80,000+ readings)
Kestrel 3000
: 250 hrs (25,000+ readings)
Kestrel 2500: 400 hrs  (40,000+ readings)
Kestrel 3500: 400 hrs  (40,000+ readings)
Kestrel 4000: 400 hrs  (40,000+ readings)
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