supply of item no.1 :- differential pressure switches (dps) of pressure range from 0.08 - 1.20 (inches wc)item no.1 :- differential pressure switches (dps) of pressure range from 0.08 - 1.20 (inches wc),item no.1 :- differential pressure switches (dps) of pressure range from 0.08 - 1.20 (inches wc) shall be provided with more than 10,00,000 operations with automatic reset with ip-54 protection as p er iec-60529 with ul-94 v0 -qty 01 no. per set. item no.2:- ss304 tube with id 4.0mm and 6.6 of od and l ength : 1.173 mtrs to connect the differential pressure switch to heating element -qty 01 no. per set. set of item no. 1&2 is required for modification works as per rdso ms no.- rdso/pe/ms/ac/0089-2022 rev.0 a nd hq/jp l. no. el/245/2(mod.) dt.09-02-23. make :- ssk,sidwal,daulatram,prag,beck or substantially e quivalent [ warranty period: 30 months after the date of delivery ] ]