I need high accuracy digital temprature and pressure sensor for the sensitive measurement of petroleum field.

help me find with high accuracy temprature and pressure sensor.

 

Did you see appropriate sensors sections at Sensors Web Portal ? There are many digital, high accuracy sensors from different manufacturers:

Temperature Sensors:
http://www.sensorsportal.com/HTML/SENSORS/TempSens_Manufacturers.htm

Pressure Sensors:
http://www.sensorsportal.com/HTML/SENSORS/PresSens_Manuf.htm

Wireless Sensors:
http://www.sensorsportal.com/HTML/SENSORS/Wireless_Sens_Manuf.htm

Good luck.

 

Take a look at this:
http://www.emersonprocess.com/smartwireless/

These wireless pressure and temperature transmitters have very high accuracy. Sensor, transmitter, power, and radio are a self-contained unit.

Jonas