Which instruments mostly used for calibration in oil and gas field?

HART COMMUNICATOR is the most commomly used instrument in caliberation for oil and gas field

HART Communicator is the most popular one and it is due to the popularity of4-mA Systems. Fluke has portable calibrators for the calibration of pressure transmitters, pressure switches, pressure gauges and thermocouples. For flow meter calibration you need a calibration lab facility.

HART Communicator, but AMS is also considered for preventive maintenance and auto calibration 

HART COMMUNICATOR/ IS A MOST COMMON CALIBRATION INSTRUMENT

Most of the all kind of Measuring (Leanear Instruments) & Pressure Gauge & Chart Recorder

HART communicators provide the tool for communicating with process instruments. Relying on an open communications protocol, HART communicators interface with HART-enabled “master” and “field” devices making it much easier to configure and calibrate instruments as well as diagnose issues before they become serious

HART communicator is Mostly used to check the Calibration of instruments in Oil and Gas Field

oil and gass presure gauges 

HART comunicator and BEAMEX

HART Communicator used to calibrate and configuration then Instrument Tag, Unit, Range is changing then also wireless transmitter used to the configuration in this HART Communicator then Loop checking used to this one.

The HART Protocol is the most widely available digital communications standard in the field of process control. More than 70% of all “smart” process instruments support HART Communication. This availability adds-up to a global installed base of more than 28 million devices.