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Enabling better global research outcomes in soil, plant & environmental monitoring.

LoRaWAN Microclimate Monitoring Station

The Microclimate Monitoring Station is comprised of a S-Node with 6.5Ah internal lithium-ion battery, 7W solar panel with mounting, and an ATMOS 14 relative humidity, barometric pressure, air temperature, and vapour pressure sensor.

Optional sensors include:

Weatherproof

Thanks to its unique Teflon screen, the relative humidity sensor can survive a deluge. Naturally, it won’t be transmitting accurately while waterlogged; but as soon as it has dried out, it’s back in the game.

Fast Response

The Teflon screen protects the sensor from liquid water and dust without limiting diffusion of water vapour. The protected sensor is still able to quickly respond to changes in humidity.

Integrated Temperature for Accuracy

Accurate relative humidity readings require accurate air temperature readings taken at the same place and time. This sensor takes both measurements simultaneously for the best possible accuracy.

Radiation Shield Included

The included radiation shield is designed to improve air temperature readings by minimising radiation and maximising airflow over the surface of the sensor. Specially designed to preserve the correlation between actual air temperature and sensor air temperature while keeping the shield size small.

ATMOS 14 Specifications

RELATIVE HUMIDITY
RANGE 0 to 100% RH
ACCURACY Sensor measurement accuracy is variable across a range of temperatures.
Refer to the chart in Figure 1 to determine the accuracy specification for the ATMOS 14 sensor.
EQUILIBRATION TIME
(τ, 63%):
< 40 s (response time in 1 m/s air stream)
HYSTERESIS < 1% RH typical
LONG TERM DRIFT < 0.5% RH/year typical
TEMPERATURE
RANGE -40°C to 80°C
RESOLUTION 0.1°C
ACCURACY Sensor measurement accuracy is variable across a range of temperatures. Refer to the chart in Figure 2 to determine the accuracy specification for the ATMOS 14 sensor
EQUILIBRATION TIME
(Τ, 63%)
< 400 s (response time in 1 m/s air stream)
LONG TERM DRIFT < 0.04°C / year typical
VAPOUR PRESSURE
RANGE 0 to 47 kPa
RESOLUTION 0.01 kPa
ACCURACY Sensor measurement accuracy is variable across a range of temperatures and RH. Refer to the chart in Figure 3 to determine the accuracy specification for the ATMOS 14 sensor.
BAROMETRIC PRESSURE
RANGE 49 to 109 kPa
RESOLUTION 0.01 kPa
ACCURACY 0.4 kPa
GENERAL
DIMENSIONS 1.96 cm (dia) x 5.4 cm (h)
POWER REQUIREMENTS 3.6 to 15 VDC, 0.03 mA quiescent, 4 mA during 300 ms measurement
RESPONSE (MEASUREMENT) TIME 300 ms
OUTPUT Decagon Digital or SDI-12
OPERATING TEMPERATURE -40°C to 80°C
CONNECTOR TYPES 3.5 mm (stereo) plug or stripped and tinned lead wires (pigtail)
CABLE LENGTH 5 m standard; custom cable length available upon request

 

VP4 VP Acc

Temperature Acc VP4