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100mm Pneumo 3-Hole Front Flange GA Drawing
100mm Pneumo Clamp Fixing GA Drawing
100mm Pneumo Gauge Surface Mount

100mm Diameter Pneumo Depth Gauge - "Mini" Design

The Ashford Instrumentation Ltd 4" (100mm) diameter stainless steel case mini pneumo gauge is typically used for diver depth monitoring or for measuring the pressure within a hyperbaric chamber. 

This premium design pneumo gauge is ideal for commercial diving applications where space on the panel is limited and an accuracy of 0.25% full scale is required. With an easy to read mirror band dial and knife edge pointer, this premium pneumo gauge is built to the highest engineering standards and is fully degreased with the dial marked with the crossed oil can symbol in red. 

Optionally the word OXYGEN can also be printed on the dial. In this instance we have the option of manufacturing the gauge with an internal solid baffle wall and large blow out back to meet the safety requirements as defined by the European Standard for Pressure Gauges EN837 S3  Safety. 

Technical Note: OXYGEN. IMCA D 022 Rev 1 (May 2014) Chapter 9 Gas Handling Section 9.6 notes that "Any gas mixture containing more than 25% oxygen by volume should be handled like pure oxygen". The 2023 IMO Diving Code lowers this threshold concentration for oxygen enriched environments from 25% oxygen (1995 code) to 22% oxygen (2023 code). Based on this information we recommend any application where the concentration of oxygen is enriched above 22% should be treated as a pure oxygen application. 

Please note that as sea water scales do not have an Internationally recognized value all of our instruments are manufactured with a sea water specific gravity value of  1.025 which is marked on the dial.

As standard this instrument is supplied as 3-hole front flange with lower back entry although a bottom entry version is available from the factory. Surface mounting with 3-hole back flange mount is also available.  Bezels can be manufactured in a range colours including red, green, and yellow.