outdoor

Out Door Weather Station

A range of meteorological sensors to be connected to LSI-LASTEM data acquisition systems or by means of analogue outputs 0/4-20 mA, 0/1-5 Vdc, or digital RS232, to user’s data acquisition systems.

SENSORS.

Select your choice ……

Temperature and relative humidity sensors
Cups wind speed sensors
Vane wind direction sensors
Combined wind speed&direction sensor
2 and 3 axis ultra-sonic wind sensor
Rain gauges
Wet presence and rain presence sensors
Atmospheric pressure sensor
Global radiometers
Sunshine duration sensor
Net radiometer
UVA, UVB, VIR, PAR, LUX sensors
Heat flow meters
Evaporimeter
Piezometric and ultra-sonic water level sensors
Ground temperature and soil moisture sensors

Thermohygrometers *Models with natural or forced ventilation by means of an aspiration fan
2% accuracy on the humidity value on the whole range by means linearization against temperature value. Local selection of the hygrometric value as relative humidity or dew point Local selection of the temperature range. On-field calibration by means of PC program *Local selection of the signal output: 0/4-20 mA, 0/1-5 Vdc, 0-1 Vdc, 60-300 mV
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Cups wind speed sensors Aluminum made, protected by polyurethane paint 1% accuracy Every wind speed sensor has, on the basis of its geometry, different responses on each point of its measurement range; the internal microprocessor adjusts the signal linearity at any wind speed value, obtaining a precise measurement Very low threshold: 0,25 m/s
Models with analogue output 0/4-20 mA, 0-5 Vdc, or direct output in Hz to be connected to LSI-LASTEM data acquisition systems Heated versions, keeps the rotor moving effectively in case of freezing.
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Vane wind direction sensor Models with wirewound low-torque (2000 Ohm) potentiometer (0-355°) or Encoder 10 bit Programmable output as instantaneous value or trogonometric average over a “n” number of samples (only on Encoder models).
Aluminum made, protected by polyurethane paint Heated versions, keeps the rotor moving effectively in case of freezing.
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Combined wind speed&direction sensor Aluminum made, protected by polyurethane paint. 1% accuracy on the wind speed. *Every wind speed sensor has, on the basis of its geometry, different responses on each point of its measurement range; the internal microprocessor adjusts the signal linearity at any wind speed value, obtaining a precise measurement.
*Models with analogue output 0/4-20 mA, 0-5 Vdc, or direct output in Hz to be connected to LSI-LASTEM data acquisition systems.
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2 or 3 axis ultra-sonic wind sensor High intrinsic strength. Possibility to measure vertical wind. Dinamic range of measurement which covers for o to 60 m/s with 0,01 resolution. Low sensibility to uncleanliness factors, snow and frost.
*The solution of the moving parts problem as seen with the traditional sensors.
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Rain gauge 333 o 1000 cmq in let area. 0,2 mm/tip (opz. 0,1-0,3, 0,4, 0,5 mm/tip) resolution. thermostatic heated models ensure complete melting of snow, even at extreme temperature. stainless steel housing, whilst the cone in teflonate brass.
*Models equipped with a siphon placed on the cone’s nozzle, in order to avoid the following: during light rain the drizzle falls on the bascule without moving it and therefore evaporates without being measured; during heavy rain, it regulates the flow into the bascule permitting all the water to fall inside.
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Presence of rain, presence of wetness sensors The rain presence sensor discriminate between pluviometric rainfall and condensation. The wet presence sensor, detect the presence of water irrespective of the source.
*N.2 outputs available: Output N.1: 100 mV ± 0,02: present - 200 mV ± 0,02: absent Output N.2 Open collector 100 mA 40 Vmax.
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Barometers Models for connecting to LSI-LASTEM data acquisitions systems Models with analogue output 0/4-20 mA, 0-5 Vdc.
*Models with thermal compensation system in order to reduce drift due to deep air temperature changes.
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Global radiometers Sensors to measure wide spectral band (305-2800 nm) called as “global radiation”. Models with thermopile or photovoltaic measurement system. *Thermopile to ISO secondary standard.
Models with direct output (microVolt) or analogue output 0/4-20 mA, 0-5 Vdc. Possibility to mount “shadow band” for diffuse radiation measurement, (not coming from the sun disk).
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Sunshine duration and direct radiation sensor *Sensor measures direct radiation from the sun and the sunshine status, defined as present when direct radiation is above 120 Wm².
*A sensors detect the illumination from a 90º section of the sky which has the location’s equinoctial line as its equator. A rotating band periodically intercepts the sunbeam. For each rotation, the instrument determines the two radiation levels: with and without the direct action of the sun disc, and calculates the difference, which gives a good approximation to the direct radiation level.
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Net radiometer Are sensors for measuring net radiation, i.e. the difference between that arriving directly from the sky and reflected short wave and re-emitted long wave radiation from the ground. Models with direct output (microVolt) or analogue output 0/4-20 mA, 0-5 Vdc.

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UVA, UVB, VIR, PAR, LUX radiometer Sensor to measure UVA radiation with wave lenght 315-400 nm. Sensor to measure UVB radiation with wave lenght 280-315 nm. Sensor to measure VIR radiation with wave lenght 745-815 nm. Sensor to measure PAR (phytologically active radiation) with wave lenght 745-815 nm
*Models with outputs: 0/4-20 mA, 0-5 Vdc, 60-300 mV.
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Heat flow sensors Heat flux sensors are used for measuring thermal flux, i.e. the quantity of enrgy that passes throught the sensor itself. Sensor for measuring ground heat flux.
Sensor for measuring wall surface heat flux. These sensors have direct outputs and are supplied with calibration certificates reporting sensitivity.
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Evaporimeter Evaporimeter pan and wooden platform built to WMO standards for class "A" evaporimeters. The pan is in stainless steel. The wooden platform is made of larchwood coated with protective white paint for exteriors.The stainless steel still well is housed in the pan and contains the evaporimeter piezometric level sensor.
*On the LASTEM data logger it is possible to program the “switch-on”of an electric valve for the automatic filling of water.
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Piezometric and ultra-sonic water&snow level sensors *Models with piezometric measurement element with different ranges: 0-10 m, 0-20 m, 0-30 m
Models with ultra-sonic measurement system to be mounted on the water or snow surface. It measures the distance between the sensor and the surface.
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Ground temperature and soil moisture

Ground temperature sensors for penetration or immersion use inside the ground. Possibility to measure ground temperature in several points of the field and to send the measurement value by radio to the data acquisition system (model BabucABC). *Sensors to measure soil moisture.
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