supply of supply of and installation of ohe power presence/absence indicator , supply of and installation of ohe power presence/absence indicator for inspection sunken pit as per model no.ss402 of m/s .samadhan or equivalent. each set consists of items as follows: (i) sensor m ount with guard, qty-01 no. (ii) sealed sensor, qty -01 no. (iii) connecting cable of length 5meters, qty-01 no. (iv) display cum power supply unit with working input voltage 180v to 250v acqty-1no. and display un it should be able to indicate power on/off and sensor failure, qty-01no. (v) connecting cable 2 of length 5 meters. qty-01 no. make - m/s samadhan or equivalent. [ warranty period: 30 months after the date of d elivery ] ]