Followings are the special features of differential pressure transmitter (891.34.2189) :differential pressure measuring ranges from 0 . 160 mbar high working pressure (static pressure) up to 25 bar overpressure safety either side up to 25 barsolid case construction for protection against external mechanical effects integrated pressure equalising valve (option)applications :suitable for all gaseous and liquid media that will not obstruct the pressure system heating, climatic, ventilating, dust removing technoclogy technical building equipment, filter plants, drinking and service water treatment monitoring and control of pumps in pressure boosting and fire exstinguishing plantsclick here for more information