Instruments Specifications1. Single Stevenson’s Screenconsist of Wooden rectangular box withits sides and door double louvered55x31x42cma) Dry and Wet bulb thermometerThe mercury in the glass thermometer Range: -35 to 55°C (resolution 0.1°C)b) Maximum thermometer The mercury in the glass thermometer Range: -35 to 55°C (resolution 0.1°C)c) Minimum thermometer Liquid: Alcohol with dumbbell-shaped index immersed in itRange: -40 to 50°C (resolution 0.1°C)2. Rain gauge- Non-recordingFiberglass(1) a collector with a gun metal rim of trulycircular shape 100 or 200 sq. cm. area (11.6cm diameter)(2) a base (3) a polythene bottle (4) a measure glass (20mm with resolution 0.5mm) Both the collector and the base are made of fibre glass reinforced polyester. 3. Soil thermometer Range: -20 to 65°C Following points to be measured5cm10cm15cm20cm30cm4. Open pan evaporimeter Pan size: 122 cm diameter and 25.4 cm deep pan made of 20 gauge galvanized iron sheet with a stilling well. Base wooden frameMeasuring Jar: 2mm5. Wind vaneRooftop mounting with direction arrows Ball Bearing rotation for wind direction6. Cup counter anemometer 3 cups rotation: Mechanical digit counter Made up of gun metal body7. Sunshine recorder It should consist of a Glass Sphere Mounted Concentrically in a Section of a Spherical Bowl. 3 Over Lapping Grooves should be provided in the Bowl to take Cards Suitable for Different Seasons of the Year. The Instrument must be mounted on a Heavy Base, which is of a Good Quality Marble Stone. The Scale of Degree of Latitude should be from -5 to 45 Degree. The Glass Sphere should have a Focal Length of 74.9mm & Having Deviation of +/- 0.25mm. One year Chart should also be provided with the sunshine recorderNote:1. A minimum warranty of three years should be provided for the instruments with onsite maintenance2. All the supplied instruments/ parts should be as per IMD standards3. The vendor should install the weather stations in specified sites (as per the standard norms of IMD) and they should also provide training on data collection. 4. One station should be installed at KFRI Peechi, Thrissur, Kerala and the second one should be installed at KFRI Sub Centre, Nilambur, Malappuram, Dt Kerala. 5. The vendor should also provide minimum 2 reference details with contact number where the vendor have already installed weather stations
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