Your search for "differential pressure transmitter" revealed the following:

Fluke 922 Airflow Meter/Micromanometer for HVAC airflow measurement
Fluke 922 HVAC airflow meter for differential pressure and air velocity testing
Fluke 726 Precision Multifunction Calibrator for industrial process calibration
Fluke 726 process calibrator for transmitter, valve and process instrument testing
Yokogawa YTA50 temperature transmitter
Yokogawa YTA50 head mount temperature transmitter
Endress+Hauser FlexView FMA90 control unit for level and flow measurement