Kestrel 3500-IS Intrinsically Safe Air Weather Meter
The Kestrel 3500-IS Intrinsically Safe Weather Meter is a critical piece of equipment in underground mine ventilation operations. The 3500-IS is a lightweight, reliable and suitably certified tool for monitoring air velocity and weather in underground environments for managing and monitoring a safe environment and heat stress for underground workers.
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Description
The Kestrel 3500-IS Intrinsically Safe Pocket Weather Meter is a critical instrument for use in underground mine ventilation operations. Split-second decisions in the field leave no time for guesswork. Get every environmental condition in seconds with the reliable Kestrel 3500-IS. A rugged, multi-function wind and weather meter that measures all the environmental variables,
including air velocity (wind speed), wet/dry bulb temperature, relative humidity, heat stress index, barometric pressure, dew point and more. Every unit is fully tested for measurement accuracy and waterproof integrity and is calibrated to NIST traceable standards.
Intrinsic Safety
The Kestrel Model 3500-IS Intrinsically Safe Pocket Weather Meter holds a Certificate of Conformity for Explosion-Protected Electrical Equipment
(to Ex ia I IP55) issued by SIMTARS.
Features
- 3-Button Control
- Real-time Clock
- Drop-Tested, MIL-STD-810G
- Waterproof and Floats
- Easy-to-read display with backlight
- Data hold function
- CR2032 Coin Cell Battery (Average Life 300 Hours)
- Neck Lanyard
- Forecast weather with pressure trend indicator
- Patented Impeller and Sensor Technology
- Reliable, portable and easy to use
- Slip-On Protective Cover
Measures
- Current/Average Wind Speed
- Maximum Wind Gust
- Wet/Dry Bulb Temperature
- Relative Humidity
- Heat Stress Index
- Wind Chill
- Dew Point
- Barometric Pressure
- Pressure Trend
- Altitude
Kestrel 3500-IS Specifications
Sensors
| Sensor | Accuracy | Resolution | Spec. Range |
| Wind Speed / Air Speed | Larger of 3% of reading, least significant digit or 20 ft/min | 0.1 m/s
1 ft/min 0.1 km/h 0.1 mph 0.1 knots 1 B |
0.6 to 40.0 m/s
118 to 7,874 ft/min 2.2 to 144.0 km/h 1.3 to 89.5 mph 1.2 to 77.8 knots 0 to 12 B |
| Ambient Temperature | 0.5 °C | 0.1 °C | -29.0 to 70.0 °C |
| Relative Humidity | 3% RH | 0.1% RH | 5 to 95% 25°C non-condensing |
| Pressure | 1.5 hPa|mbar
0.044 inHg 0.022 PSI |
0.1 hPa|mbar
0.01 inHg 0.01 PSI |
750-1100 hPa|mbar 22.15-32.48 inHg 10.88-15.95 PSI |
Calculated Measurements
| Measurement | Accuracy | Resolution | Sensors Employed |
| Altitude | typical: 23.6ft/7.2 m from 750 to 1100 mBar
max: 48.2 ft/14.7 m from 300 to 750 mBar |
1ft
1M |
Pressure, User Input (Reference Pressure) |
| Barometric Pressure | 0.07 inHg
2.4 hPa|mbar 0.03 PSI |
0.01 inHg
0.1 hPa|mbar 0.01 psi pressure |
Pressure, User Input (Reference Altitude) |
| Delta-T | 3.2 °F
1.8 °C |
0.1 °C | Temp, RH, Pressure |
| Dew Point | 3.4 °F
1.9 °C 15-95% RH Refer to Range for Temperature Sensor |
0.1 °C | Temp, RH |
| Heat Index | 4.0°C | 0.1 °C | Temp, RH |
| Wet Bulb Temp.
Psychrometric |
1.8 °C | 0.1 °C | Temp, RH, Pressure |
| Wind Chill | 0.9 °C | 0.1 °C | Wind Speed, Temperature |
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