supply of power(battery) operated knapsack sprayer in different growth centres under area of activity of sundarban development board in south 24-parganas and north 24-parganas districts , a ) power ( battery ) operated knapsack sprayer specifications: 1 ) 16 litre capacity injections moulded hdpe tank . tank weight more than 950 gram and thickness more than 2 . 25 mm . 2 ) pump will have minimum discharge capacity of 4 litre of more per minute . 3 ) maximum pressure 100 psi and working pressure 40 psi . 4 ) ss telescopic lance with brass connector & brass or plastic housing . 5 ) sealed lead acid battery-12 amp x 12 volt . minimum weight of battery-3 . 5 kg . battery should be manufactured in india by any reputed indian iso certified company . minimum six months replacement warranty is needed for battery . 6 ) battery , motor and pump shall be mounted beneath the chemical tank . 7 ) led light . 8 ) packed in 2x1 master cartoon . 9 ) safety kit-goggle , hand gloves and mask shall accompany with each unit . the sprayer shall be made in india and the product should be certified by fmtti or any govt . of india approved testing centre .