The LSI pyranometer is mounted on Rwenzori station. It is an instrument to measure the global sun radiation (direct and diffuse) which reaches the terrestrial surface. With this instrument it is possible to measure not only the global radiation, but also the reflected sun radiation (albedometer) and the diffuse radiation by means of the occultation band. The solarimeter measures radiation values within 300 and 3000 nm. The element used to for the measurement is a thermopile whose external surface has been darkened with matte black paint C10 Nextel bearing a reflecting power < than 2% (e>0.98) in the spectral area of the sensor. Technical caractheristics: Spectral response (nm):300-3000 Impedance (ohm): 1000-1300 Operative temperature (°C): -40 +80 Bubble sensitivity (degree): 0.5 Radiometer sensitivity (µV/w/m2): 30-45 Max. irradiance W/m2: 2000 Weight: 1.0 kg

At the AWS Rwenzori station the DQA030 rain gauge is manufactured by LSI-Lastem equipped with a siphon placed on the cone's nozzle; it has two functions: 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. LSI-LASTEM rain gauges have stainless steel housing whereas the cone has been designed to avoid the drops splash phenomena and to allow water droplets to dribble down inside even in case of very light rain. The rain gauge can be placed either directly on the ground by means of the DYA042 base plate or mounted on the top or the side of 50 mm diameter. For sites with sub-zero temperatures, the thermostatic heated models ensure the complete melting of snow, even at extreme temperature, whereas minimizing losse of evaporation; these models are insulated to reduce heat dispersion. Technical characteristic: Collettor surface area: 324 cmq Collector area diameter: 203 mm Measurement range: Max 10 mm/min Resolution: 0.2 mm/imp. (opt. 0.1, 0.5 mm/imp) Accuracy: 0-1 mm/min: +- 1 basculata/tip 1-10 mm/min:1% Contact: 1 reed (opt. N.2 REED) 0.5 a/24v non inductive Pulse duration: 100 msec+-50 Collector cone material: Aluminium External housing material: Aluminium Tipping bucket material: Aluminium

At the Rwenzori station the CX115P Lsi-Lastem barometer is connected with measurement system (recorder, data logger) that accepts analog signals. The barometer functions according to the piezometric principle: a resistive film is deposited on a slice of silica with a bridge form; as the pressure changes, the slice will deform and consequently changes the system's resistance. The CX115P model mounts a special thermal compensation system that significantly reduces drift. Specific characteristic: Range: 800 ž 1100 hPa (1 hPa=1 mBar) Sea level correction range: -300...+2000 mt. Thermal drift: 0,01 hPa/°C (-10..+60°C) Linearity&Hysteresis: < 0,3% of the range Overload: max. 2 Pa Load resi stance: Current output types: <500W. Power consumption: 3 W Response time (T90): 1 ms Environmental limits: -25 .. +60°C Output connections: terminals Weight: 650 gr. Housing case material: Plastic Protection: IP40 Downward cable outlet

The DNA022 Lsi-Lastem combined wind speed-direction sensor is mounted on a 5m pole on Rwenzori station in 2006. The CombiSD sensor includes, in a single apparatus, the both transducers for measuring wind speed and wind direction. Its use simplifies the installation and the plant design in respect of the sensors with separate measurements plus giving some other advantages being smaller, lighter and cheaper. The CombiSD DNA022: sensor has a direct signal output. Frequency (Hz) for wind speed and resistance (Ohm) for wind direction. The CombiSD has low power consumption, it can be used in systems with small energy availability. The technical characteristics are: - Principle of operation: 3 cups and vane anemometer - Speed sensor: Optoelectronic disk - Direction sensor: 2000 Ohm wire potentiometer / Positioning Hall effect sensor - Housing: Heavy gauge anodised aluminium - Shaft carriers: Low-torque stainless steel bearings - Protection (vertical position): IP65 - Mechanical mounting: On 48 50 mm diameter mast - Electrical outlet terminators: IP65 watertight connector - Weight (instrument with rotors): 950 gr. The Physical and operational specification are: - damage threshold > 75 m/s - operating temperature: -30°+70°C The speed measures are specified by: - Measurement range: 0-60 m/s (using transfer function) - Threshold: 0,21 m/s - Response time (63% at 5 m/s): 0.8 s - Distance constant (delay distance) at 5 m/s: 4 m - Resolution (integration time=1s): 0.05 m/s - Accuracy & Linearity: 0,1 m/s+1%VL (readout), if connected to LASTEM data loggers. The direction measures are specified by: - Measurement range: 0 ÷ 360 - Threshold: 0,15 m/s - Response time (at 5 m/s): 0,26 s - Delay distance (at 5 m/s): 1,32 m - Damping coefficient (VDI3786): 0,21 - Transfer function: Dir(°)= 355 x R(Ohm)/2000 - Resolution: 0,1 - Accuracy: 1% FS (Full scale) - Integral linearity: 0,5%