supply of set of item no 1 & 2 for modification worksset of item no 1 & 2 for modification works,set of item no 1 & 2 for modification works as per rdso spec.no. rdso/pe/ms/ac/0089-2022 rev.0 item no.1: differential pressure switches (dps) of pressure range from 0.08 - 1.20 (inches wc) shall be provided with more t han 10,00,000 operations with automatic reset with ip-54 protection as per iec-60529 with ul-94 v0. - qty 01 no. per s et item no.2: suitable length ss304 tube with id 4.0 mm and 6.6 of o.d and length: 1.173 mtrs to connect the different ial pressure switch to heating element. - qty 01 no. per set [ warranty period: 30 months after the date of delivery ] ]