equipment purchase for scientific research , chlorophyll meter : spad-502 plus, measurement subject: crop leaves, measurement methods: optical density difference at two wave length, 2 mm × 3 mm measurement area, subject thickness: 1.2 mm maximum, subject insertion depth: 12 mm ( with stopper having position adjustable from 0 to 6 mm, light source: 2 led elements, receptor: 1 spd, display: lcd panel with 4 digit measurement value, display range: 9.9 to 199.9 spad units, memory capacity for upto 30 value, 2 aa size alkaline battery having capacity of taking > 20, 000 measurements, accuracy: within ± 1.0 spad unit, repeatability:within ± 0.3 spad unit, reproducibility: within ± 0.5 spad unit, size ( w × h × d ) : 78 ×164×49 mm, with 200 g weight excluding battery, standard accessories: depth stop, strap, 2 aa size alkaline batteries, soft case, reading checker the manufacturer should have a service set-up in eastern india or nearest location within india & those document needs to be enclosed along with your bid. manufacturer should submit their factory license certificate along with their bid. ce & iso ( 9001 : 2015 & 13485 : 2016 ) approved on-site warranty: minimum 1 year