We HARI OM REFRIGERATION CO deal into HVAC spare parts. HVAC spare parts suppliers in mumbai. HVAC spare parts suppliers in India. We are authorized channel partner of Honeywell, Siemens, Danfoss, JCI, Swep, Greystone and subzero. Mentioned product is siemens differential pressure switch. Siemens differential pressure switch QBM81-5. Siemens differential pressure switch QBM81. Siemens air differential pressure switch. Siemens water differential pressure switch. Siemens distributor in pune. Siemens distributor in mumbai. Siemens distributor in India. Siemens distributor in Chennai. Siemens distributor in Delhi. Siemens distributor in Bangalore. Siemens distributor in gujrat.