supply of differential pressure switches (dps) , set of item no. 1 & 2 as per rdso modification sheet rdso/pe/ms/ac/0089-2022 (rev.0) & rdso specification no. rdso/pe/spec/ac/0061-200 5 (rev.2) or latest item no. 1 : differential pressure switches (dps) of pressure range from 0.08 - 1.20 (inches wc) , operations greater than 10,00,000 with a utomatic reset and ip-54 protection as per iec-60529 & ul-94 v0 - qty 01 no. per set item no. 2: ss304 tube with id 4.0 mm and 6.6 mm of o.d and length: 1.173 meters or suitable to connect the differential pressure switch to heating element. - qty 01 no. per set. [ warranty period: 30 months after the date of delivery ] ]