The TDI Series pressure transmitter uses, as its measuring principle, the well known and field proven technique of capacitance sensing, enhanced by microprocessor based electronics.Designed for process measurement and control applications, these 2-wire transmitters generate a 4-20mA signal which is either characterised or directly proportional to the pressure applied. The HART communications protocol is standard for all versions.The 4301 offers simple local zero and span adjustment. Full local configuration can also be made if required without the need of a separate hand held configurator.Manufactured to ISO9001 quality standards, every 4301 is cartified EExia and EExd (CENELEC) and offers full process wetted material traceability to 3.lb requirements.