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Kestrel Weather Australia - Ph: 03 9005 1708

 
 

Kestrel 3500DT Pocket Weather Meter

Price: $455.00

Price: $455.00

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To ensure safety and effectiveness when spraying, it is critical to measure relative humidity, wind speed and wind direction. Many locales regulate the maximum permitted wind speed during spraying to minimize spray drift. In hot, dry conditions, expensive chemicals may evaporate into the air rather than onto your crops. However, you can minimize costly evaporation by selecting an appropriate nozzle and increasing the spray droplet size.

Quickly & Accurately Calculates Delta T For You

The Kestrel 3500 DT incorporates a Delta T calculation, the spread between the wet bulb temperature and the dry bulb temperature (in degrees C). Delta T offers a quick guide to determining acceptable spraying conditions. For example, it is not recommended to apply pesticides when Delta T is above 10 — a range of 2 to 8 is ideal. With the Kestrel 3500 Delta T, the calculation is done for you accurately and simply.

The Kestrel 3500 Delta T incorporates barometric pressure correction in its wet bulb temperature calculation, ensuring accuracy even on low pressure days, at high altitudes, and in very dry weather when Delta T monitoring is important. 

Kestrel Pocket Weather Meter Accessories - Click Here

 Kestrel 3500 Delta T Features

  • Real-time clock
  • Protective cover with sure-grip overmolding
  • Data hold function
  • Large easy-to-read display with backlight
  • Waterproof and floats
  • Measure environmental conditions quickly and accurately
  • Forecast weather with pressure trend indicator
  • Reliable, portable and easy to use
  • Innovative humidity sensor designed for stability and accuracy in abrupt condition changes
  • Thermally adjusted humidity sensor
  • Patented user-replaceable impeller
  • Quick response, external thermistor
  • High precision pressure sensor
  • Humidity sensor can be recalibrated in the field with our Relative Humidity Calibration Kit.
  • All instruments and accessories are completely assembled in the USA
  • 5-year warranty

Kestrel 3500 Delta T Includes

  • A slip-on protective cover
  • Neck lanyard
  • CR2032 coin cell battery (Average life 300 hours)
  • Kestrel Certificate of Conformity

Measurement
Response Time
UnitsOperational RangeResolutionAccuracy
(+/-)
Specification Range
Wind Speed
1 second  
m/s0.4 to 60.0 m/s0.1Larger of 3% of reading or least significant digit0.4 to 40.0 m/s
ft/min59 to 11,948 ft/min159 to 7877 ft/min
km/h1.0 to 218.0 km/h0.11.0 to 144.0 km/h
mph0.8 to 135.0 mph10.8 to 89.0 mph
knots0.6 to 118.3 kt0.10.6 to 78.0 kt
Beaufort0 to 12 B0.10 to 12 B
1 inch diameter impeller with precision axle and sapphire bearings. Off-axis accuracy -1% @ 5º off-axis; -2% @ 10º; -3% @ 15º.  Calibration drift < 1% after 100 hours use at 16 MPH / 7 m/s. Sustained operation above 60 MPH / 27 m/s will wear impeller rapidly and may cause destruction of impeller.  Replacement impeller (NK PN-0801) may be field-installed without tools (US Patent 5,783,753).
Temperature
1 second
°F-49.0 to 257.0 °F0.11.8 °F-20.0 to 158.0 °F
°C-45.0 to 125.0 °C0.11.0 °C-29.0 to 70.0 °C
Measures air, water and snow temperature.  Thermally isolated, hermetically sealed, precision thermistor mounted externally (US Patent 5,939,645).  Calibration drift negligible.
Relative Humidity
1 minute 
%RH0.0 to 100.0 %0.13.0 %RH 5.0 to 95.0 % non-condensing
Polymer capacitive humidity sensor mounted in thin-walled chamber external to case for rapid, accurate response (US Patent 6,257,074).  (To achieve stated relative humidity accuracy, unit must be permitted to equilibrate to external temperature when exposed to large, rapid temperature changes and must be kept out of direct sunlight.)  Calibration drift +/- 2% over 24 months. Relative humidity may be recalibrated at factory or in field using Kestrel Humidity Calibration Kit (NK PN-0802).
Pressure  
1 second  
(mb & PSI 4000 model only)
inHg0.3 to 32.5 inHg0.010.05 inHgAt 77.0 °F, 22.1 to 32.5 inHg
hPa / mb10.0 to 1100.0 hPa / mb0.11.5 hPa / mbAt 25.0 °C, 750 to 1100 hPa / mb
PSI0.15 to 16.0 PSI0.010.02 PSIAt 77.0 °F, 10.9 to 16.0 PSI
Monolithic silicon piezoresistive pressure sensor with second-order temperature correction. Maximum error over temperature range 32 to 158 °F (0 to 70°C) , +/- 0.06 inHg / +/-2.0 hPa. Calibration drift typically -0.03 inHg / -1.0 hPa per year. Pressure sensor may be recalibrated at factory or in field.
Altitude  
1 second  
ft-6000 to 30000 ft150 ftAt 77.0 °F, <19,700 ft. Max error +/- 98 ft
m-2000 to 9000 m115 mAt 25.0 °C, <6,000 m.  Max error +/- 30 m
Temperature compensated pressure (barometric) altimeter. 
Dewpoint 
1 minute  
°F0.0 to 100.0 %RH, -49.0 to 257.0 °F0.13.6 °F-20.0 to 158.0 °F, 20.0 to 95.0% RH
°C0.0 to 100.0 %RH, -45.0 to 125.0 °C0.12.0 °C-29.0 to 70.0 °C, 20.0 to 95.0 %RH
Calculated from the primary measurements of temperature and relative humidity. Temperature to which the air would need to be cooled at a constant pressure to become saturated.
Wet Bulb Temperature 1 minute  °F-49.0 to 257.0 °F, 0.0 to 100.0 %RH, 8.86 to 32.48 inHg0.13.6 °F32.0 to 100.0 °F, 5.0 to 95.0% RH, 8.86 to 32.48 inHg, <19700 ft
°C-45.0 to 125.0 °C, 0.0 to 100.0 %RH, 300.0 to 1100.0 hPa0.12.0 °C0.0 to 37.8 °C, 5.0 to 95.0 %RH, -2000.0 to 9000.0 hPa, <6000 m
Calculated from the primary measurements of temperature, relative humidity and pressure. Temperature indicated by a wet bulb psychrometer.
Max/Avg
Wind Speed
One-button clear and restart of Max Wind Gust and Average Wind measurement.
Pressure TrendContinuously updating three-hour barometric pressure trend indicator:  rising rapidly, rising, steady, falling, falling rapidly.
DisplayReflective 4 digit LCD.  Digit height 0.36 in / 9 mm.
Display Update1 second.
Display BacklightAviation green electroluminescent backlight.
Clock / CalendarReal-time hours:minutes clock.
Operational Temperature Range
(LCD and Batteries)
The operational temperature range of the liquid crystal display and batteries is 14° F to 131° F / -10 °C to 55 °C. Beyond the limits of the operational temperature range, the unit must be maintained within range and exposed for minimum time necessary to take reading.
Storage Temperature-22 °F to 140 °F / -30 °C to 60 °C.

Auto Shutdown

After 45 minutes of no key presses.
CertificationsCE certified. Individually tested to NIST-traceable standards (written certificate of tests available at additional charge).  
BatteriesCR2032, one, included. Average life, 300 hours of use, +/-depending on backlight use.
EnvironmentalWaterproof (IP67 standard). Drop-tested (MIL.STD.810F; unit only. Substantial impact may damage replaceable impeller.).
DimensionsUnit 4.8 x 1.7 x 0.7 in / 122 x 42 x 18 mm.  Case 4.8 x 1.9 x 1.1 in / 122 x 48 x 28 mm.
WeightUnit 2.3 oz / 65 g.  Case 1.3 oz / 37 g.

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Spare Impeller (Easy User Install)

Spare Impeller (Easy User Install)

Replacement impeller for all Kestrel models. Simply presses out, no tools required to change.
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New for Spring 2008! A tripod fitted with the same Kestrel friendly clamp as on our mini tripod. Will accommodate any Kestrel model. Or remove the...
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Relative Humudity Calibration Kit

Relative Humudity Calibration Kit

The RH calibration kit includes the following items: three clear, sealable containers one container with magnesium chloride solution one container...

  • Model: k3500DT
  • Shipping Weight: 0.5kgs



This product was added to our catalog on Thursday 16 July, 2009.

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