Tender For supply of set of item no. 1&2 for modification works as per rdso specn. no.rdso / pe/ms/ac/0089-2002 rev.0 and hq lr. no. el/ 245/2 (mod.) dt.09-02-23. 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 per iec-60529 with ul-94 v0 -qty 01 no. per set. item no.2: suitable length ss304 tube with id 4.0mm and 6.6 of od and length: 1.173 mtrs to connect the differential pressure switch to heating element - qty 01 no.per set.