Gearless, Direct Drive Pressure Gauges


Industrial Pressure Gauges

The advantage of Perma-Cal Direct Drive pressure gauges over conventional C-tube gauges is simple; only one moving part.  Perma-Cal gauges have a unique helically-wound element that is attached directly to the pointer shaft.  This eliminates the need for any movement-amplifying gears or linkages – the parts of a C tube gauge that fail most frequently.  Perma-Cal gauges maintain their structural integrity and accurate calibration in the most demanding environments, even during prolonged and rugged use.

  • Field convertible from no flange configuration to front or rear flange (Metal & SS Cases only)
  • Ambient temperatures to 400ºF (205ºC) and 600ºF (315ºC) Media.
  • Internally dampened with a small application of heavy silicone grease on the one moving part, which eliminates pointer flutter
  • Accuracy available from ±0.25% of F.S. to ±1% of F.S.
  • Over-pressure without calibration shift, 150% of F.S. pressure
  • Burst pressure +500% of F.S.
  • Wetted parts, Inconel X-750 element, 316S.S. stem, 304S.S. capillary, silver sold

Quality materials provide years of trouble free service.  Perma-Cal gauges require no maintenance except for the periodic Calibration re-certification outlined within your quality assurance guidelines.  This type of trouble free service is a direct result of design simplicity coupled with the high quality materials used in gauge construction.

Process Gauges

Accuracy: ±.5% F.S.(Grade 2A) OR±.5% Mid-Scale/±1% F.S.*

Process gauges feature bold lettering and an easy read pointer.

Test Gauges

Accuracy: ±.25% F.S.(Grade 3A)*

Test gauges feature a knife-edged pointer for precision readings and include calibration certificates.




Request quote
Scroll to Top