procurement of spares for opacity meter (cems) installed at stack, continuous effluent quality monitoring system (ceqms) and connectivity system installed at atps mppgcl chachai , spares of dust analyzer (model : dcem 21xx) , fmdcem21xx,display interface pcb , spares of ceqms , tss sensor – fmtcs1000 with 10 meter cable. , ph sensor – polilyte pro 120 with 10 meters as7 cable & external rtd for temp output , rs-485 communication card (a4t rs485 card for aqua4trans transmitter) , ph input card(a4t ph card for aqua4trans transmitter , tss input card(a4t tss card for aqua4trans transmitter) , power supply card for aqua4trans transmitter , signal converter for electromagnetic flow meter, model: ifc 050 , output : 4-20 ma & modbus rs485 , spares of connectivity system , connectivity controller + power supply module + rs485 splitter + smps power supply module 230 v ac to 24 v ac (without software of cpcb & mppcb connectivity)