With more than one million BARTON® DPU-based instruments in service around the world today, Cameron’s Measurement Systems division is a premier supplier of reliable and accurate chart recorders, indicators, switches and pneumatic controllers. Originally developed in the early 1920s, our differential pressure technology features a welded bellows assembly that increases accuracy while dramatically reducing the effects of wear. To facilitate quick and easy repairs all DPU based instruments are supported with pre-calibrated exchange or repaired sub-module bellows assemblies.


Perfected Construction techniques ensure linearity, low hysteresis and a long life
Die Cast Aluminum Cases with Stainless steel linkage
Standard 12″ (300mm) nominal diameter circular charts
Disposable felt tip inking system
Battery or spring wound clock


199 DPU Actuated

Model 202E Flow Recorder
Models 274A Pneumatic Transmitters

NON DPU Actuated

Model 242E Pressure Temperature Recorder
Model J8A 8″ Pressure-Temperature Recorder

Extra product images

Barton 202 Recorder Barton 274A Transmitter


Controls Flow Valves Gas Oil Repair Maintenance Combustion Actuators Burner Overhaul Contact