Technical Specifications

Measurement Specifications

Solar Radiation

Range: 0 – 1750 W/m²

Resolution: 1 W/m²

Accuracy: ± 5% of measurement typical

Precipitation

Range: 0 – 400 mm/h

Resolution: 0.017 mm

Accuracy: ± 5% of measurement from 0 to 50 mm/h

Relative Humidity (RH)

Range: 0 – 100 % RH (0.00 - 1.00)

Resolution: 0.1% RH

Accuracy: Varies with temperature and humidity, ±1.5% RH typical. See specification chart.

Hysteresis: ±0.80% RH, typical RH

Long-term Drift: ±0.25% RH/year, typical

Air Temperature

Range: –50 to 60 °C

Resolution: 0.10 °C

Accuracy: ±0.60 °C

Humidity Sensor Temperature

Range: –40 to 50 °C

Resolution: 0.10 °C

Accuracy: ± 1.0 °C

Vapor Pressure

Range: 0 – 47 kPa

Resolution: 0.01 kPa

Accuracy: Varies with temperature and humidity, ±0.2 kPa typical below 40 °C. See specification chart.

Barometric Pressure

Range: 1 – 120 kPa

Resolution: 0.01 kPa

Accuracy: ±0.05 kPa at 25 °C

Equilibration: <10 ms

Long-term Drift: < 0.1 kPa/year, typical

Horizontal Wind Speed

Range: 0–30 m/s

Resolution: 0.01 m/s

Accuracy: The greater of 0.3 m/s or 3% of measurement

Wind Gust

Range: 0–30 m/s

Resolution: 0.01 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° to 90°

Resolution: 0.1°

Accuracy: ±1 °

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 – 40 km

Resolution: 3 km

Accuracy: Variable

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

Diameter: 10.0 cm (3.9 in)

Height: 28 cm (11.0 in), includes rain gauge filter

Operating Temperature Range

Minimum: –50 °C

Typical: NA

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.

Cable Diameter

0.165 ±0.004 in (4.20 ±0.10 mm), with minimum jacket of 0.030 in (0.76 mm)

Connector Types

Stereo plug connector or stripped and tinned wires

Stereo Plug Connector Diameter

3.5-mm

Conductor Gauge

22-AWG / 24-AWG drain wire

Electrical and Timing Characteristics

Supply Voltage (VCC to GND)

Minimum: 3.6 VDC continuous

Typical: NA

Maximum: 15.0 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: 2.8 V

Typical: 3.0 V

Maximum: 5.5 V

Digital Input Voltage (Logic Low)

Minimum: -0.3 V

Typical: 0.0 V

Maximum: 0.8 V

Digital Output Voltage (Logic High)

Minimum: NA

Typical: 3.6 V

Maximum: NA

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: 1.0 V/ms

Current Drain (During Measurement)

Minimum: 0.2 mA

Typical: 8.0 mA

Maximum: 33.0 mA

Current Drain (While Asleep)

Minimum: 0.2 mA

Typical: 0.3 mA

Maximum: 0.4 mA

Power Up Time (SDI Ready)—other commands

Minimum: NA

Typical: 800 ms

Maximum: NA

Power Up Time (SDI Ready)—aRx! commands

Minimum: NA

Typical: 10 s

Maximum: NA

Measurement Duration

Minimum: NA

Typical: 110 ms

Maximum: 3000 ms

Other

Pyranometer Spectral Response

See graph in specification chart

Compliance

EM ISO/IEC 17050:2010 (CE Mark)

GSA

View GSA details