bids are invited for soil moisture & temperature sensor - • measurement of soil electrical conductivity (ec), relative dielectric permittivity, volumetric water content, soil temperature• sensing volume: > 3000 cm3 • soil temperature measurement range: 0° to 70°c • soil temperature measurement accuracy: ±0.5°c (for typical soil temperatures [0 to 40°c] when probe is inserted into the soil) or better• soil temperature resolution: 0.1°c• volumetric water content measurement range: 0 -100%• volumetric water content resolution: 0.5% or better• volumetric water content measurement accuracy:± 3% or better electrical conductivity (ec)• range for bulk ec (bec): 0 to 8 ds/m or wider• accuracy: ± (6% + 0.06 ds/m) or better• resolution: 0.5% of bulk ec or better relative dielectric permittivity• range 1 to 80 or wider• accuracy:± (4% of ec +0.8), with a maximum value of ±2 better , rain fall sensor - ·         sensor type: tipping bucket/ magnetic reed switch ;temperature: 0 to 50°c or wider; rainfall per tip: <0.3mm , datalogger - should cater the requirement of connecting 4 soil temperature and soil moisture probes and a rain gauge; minimum sampling rate:1hz or better; inbuilt data storage: minimum 3 months with 1-minute sampling; operating temperature range: 0 to 50° c or wider; provision for data transfer to computer/usb , enclosure - ·      weather-resistant enclosure. suitable for mounting data logger and protecting from environment. white color for reflecting solar radiation, reducing temperature gradients inside the enclosure without using separate radiation shield. , power supply - ·      1-set of power supply for a set of measurement system (4-soil probes, 1 rain fall sensor and 1data logger); adequate solar panel and battery for operating the above , mounting stand - ·      1 meter mounting stand for fixing the enclosure outdoor, mounting kit/hardware/cables/accessories should be provided total quantity : 1