Tender For Automatic Weather Station In The Department Of Environmental Sciences, University Of Kerala, Kariavattom Campus. Thiruvananthapuram

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Tender For Automatic Weather Station In The Department Of Environmental Sciences, University Of Kerala, Kariavattom Campus. Thiruvananthapuram AUTOMATIC WEATHER STATION 1. DATALOGGER  Minimum Scan Rate of 10Hz  Analog Inputs : 6 , Pulse Inputs : 2 , SDI Inputs : 2  Switched Excitation Voltage Channels : 2  Communication Ports : RS232 , USB  Input Voltage Range : -100 mV to +2500 mV  Analog / Digital Bits : 24 Bit  Analog Resolution : 0.23 Micro Voltage  Idle Current Drain, Average 1.5 mA (@ 12 Vdc)  Active Current Drain, Average 5 mA (@ 12 Vdc for 1 Hz )  Inbuilt Data storage for Two years with 1 Minute duration  Temperature Range : -40 to 70oC  Power Requirements : 10 to 18 Vdc  Real-Time Clock Accuracy : ±1 min. per month  Inbuilt Charge Regulator For Charging the battery from Solar Panel 2. AIR TEMPERATURE & RELATIVE HUMIDITY SENSOR Air Temperature Sensor  Range: -40oC to + 70oC  Accuracy: +/- 0.4oC or better  Resolution : 0.001°C  Housing Classification IP67  Output: Compatible with data logger Relative Humidity Sensor  Range: 0 to 100% RH  Output Compatible with data logger  Accuracy: +/- 3% or better  Housing Classification IP67  Operating Temp Range: -40oC to +60oC A naturally aspirated radiation shield should be provided with the sensor. 3. RAINFALL SENSOR  Sensor type : Tipping bucket/ magnetic reed switch  Material : Anodized aluminium  Temperature: 0° to +50°C  Rainfall per tip: 0.254 mm  Volume per Tip : 4.73 ml/tip 4. WIND SPEED & DIRECTION SENSOR Wind Speed Sensor  Type: Cup Anemometer  Range: 0 to 50 m/s  Accuracy: ±0.5 m/s  Threshold: 0.5 m/s  Output: Compatible with data logger Wind Direction Sensor  Type: Potentiometer Balanced vane  Range Mechanical: 360° Electrical: 352° (8° open)  Accuracy: ±5°  Output: Compatible with data logger 5. ENCLOSURE  Weather-Resistant 10 x 12 inch Enclosure. Includes suitable for data logger with a power supply and one or more peripherals.  Color White (reflects solar radiation, reducing temperature gradients inside the enclosure without using a separate radiation shield) 6. POWERSUPPLY  SMF Battery 12V, 7 AH and Solar Panel of 20 Watts 7. MOUNTING STAND  1.5 Meter Mounting Stand for fixing all the above instruments in outdoo