200 dp indicator
All showing scales can be evenly graduated to measure shear stress, fluid concentration, or square root for immediate stream speed reading. Special scales can be provided in flat or non-uniform containers to indicate the liquid concentration. Scales are accessible in black with white font (normal) and white with black font (supplementary). A rupture-proof bellows DPU with essential temperature adjustment actuates the sensor. The moving wheel transmits the movement through the connecting link to the identifying pointer as the torque tube rotates.
The M199 (used with M200) DPU features dual, liquid-filled bellows designed to withstand repeated overranges equal to the safe working pressure of the housings without altering the calibration. In response to changes in the differential pressure monitored at the high and low pressure sides of the primary device installed in the process run, the bellows within the DPU move. The motion of the DPU bellows is mechanically transmitted to the alarm system through a revolving torque tube loop.
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