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ATMOS 41 Tech Specs
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Technical Specifications

Measurement Specifications
Barometric Pressure
Range: 1.0000 – 120.0000 kPa
Resolution: 0.0100 kPa
Accuracy: ±0.05 kPa at 25 °C
Equilibration time (τ, 63%): <10 ms
Horizontal wind speed
Range: 0.0000 – 30.0000 m/s
Resolution: 0.0100 m/s
Accuracy: the greater of 0.3 m/s or 3% of measurement
Wind gust
Range: 0.0000 – 30.0000 m/s
Resolution: 0.0100 m/s
Accuracy: the greater of 0.3 m/s or 3% of measurement
Wind Direction
Range: 0 – 359 °
Resolution: 1 °
Accuracy: ±5 °
Tilt
Range: -90 – 90 °
Resolution: 0 °
Accuracy: ±1 °
Precipitation
Range: 0.0000 – 400.0000 mm/h
Resolution: 0.0170 mm
Accuracy: ± 5% of measurement from 0 to 50 mm/h
Solar radiation
Range: 0.0000 – 1750.0000 W/m2
Resolution: 1.0000 W/m2
Accuracy: ± 5% of measurement typical
Humidity sensor temperature
Range: -40 – 50 °C
Resolution: 0 °C
Accuracy: ± 1.0 °C
Lightning strike count
Range: 0 - 65,535 strikes
Resolution: 1 strike
Accuracy: variable with distance, >25% detection at <10km typical
Lightning average distance
Range: 0.0000 – 40.0000 km
Resolution: 3.0000 km
Accuracy: variable
Air Temperature
Range: -50 – 60 °C
Resolution: 0 °C
Accuracy: ±1 °C
Relative Humidity (RH)
Range: 0 – 100 % RH (0.00 - 1.00)
Resolution: 0 % RH
Accuracy: Varies with temperature and humidity, ±3% RH typical. See specification chart.
Vapor Pressure
Range: 0.0000 – 47.0000 kPa
Resolution: 0.0100 kPa
Accuracy: Varies with temperature and humidity, ±0.2 kPa typical below 40 °C. See specification chart.
Communication Specifications
Output
SDI-12 communication
Data Logger Compatibility
METER ZL6 and EM60 data loggers or any data aquisition systems capable of switched 3.6- to 15.0-VDC excitation and SDI-12 communication
Physical Specifications
Dimensions
Height: 28 cm (11.0 in), includes rain gauge filter
Diameter: 10.0000 cm (3.9 in)
Operating Temperature Range
Minimum: -50 °C
Maximum: 60 °C
NOTE: Barometric pressure and relative humidity sensors operate accurately at a minimum of –40 °C
Cable Length
5 m (standard)
75 m (maximum custom cable length for additional cost)

NOTE: Contact Customer Support if a nonstandard cable length is needed.
Connector Types
3.5-mm stereo plug connector or stripped and tinned wires
Electrical and Timing Characteristics
Supply Voltage (VCC to GND)
Minimum: 3.6000 VDC continuous
Maximum: 15.0000 VDC continuous
NOTE: The ATMOS 41 weather station must be continuously powered in order to work properly

NOTE: For the ATMOS 41 weather station to meet digital logic levels specified by SDI-12, it must be excited at 3.9 VDC or greater.
Digital Input Voltage (logic high)
Minimum: 2.8000 V
Typical: 3.0000 V
Maximum: 5.5000 V
Digital Input Voltage (logic low)
Minimum: -0.3000 V
Typical: 0.0000 V
Maximum: 0.8000 V
Digital Output Voltage (logic high)
Typical: 3.6000 V
NOTE: For the ATMOS 41 weather station to meet digital logic levels specified by SDI-12, it must be excited at 3.9 VDC or greater.
Power Line Slew Rate
Minimum: 1.0000 V/ms
Current Drain (during measurement)
Minimum: 0.2000 mA
Typical: 8.0000 mA
Maximum: 33.0000 mA
Current Drain (while asleep)
Minimum: 0.2000 mA
Typical: 0.3000 mA
Maximum: 0.4000 mA
Power Up Time (SDI Ready)—other commands
Typical: 800 ms
Power Up Time (SDI Ready)—aRx! commands
Typical: 10 s
Measurement Duration
Typical: 110 ms
Maximum: 3000.0000 ms
Other
Pyranometer spectral response
Compliance
Manufactured under ISO 9001:2015
EM ISO/IEC 17050:2010 (CE Mark)
GSA