Direct Drive Pneumo Depth Gauge (Series 25) - 4.5", 6", 8.5" & 12" Diameters

Direct drive pneumo gauges can be manufactured in diameters 4.5", 6", 8.5" and 12". These precision instruments feature a  "Helical Movement"  and are  specifically designed for the commercial diving market. Under certain circumstances direct drive bourdon tube gauges can offer a number of safety & technical advantages over a conventional C-tube design as there are no gears, linkages or springs to wear, break or maintain. Click HERE for further details.

The instrument is manufactured with a 1/4" NPT male process connection so that it can be bench calibrated like a normal bourdon tube pressure gauge. Zeroing the pointer is quick and easy using the through dial adjustment mechanism on the face of the gauge. Each gauge is supplied from new with a Point to Point Calibration Certificate fully traceable to National Standards.

Please note this instrument will be calibrated to the manufacturers standard sea water specific gravity unless specifed otherwise.

This gauge conforms to the IMCA (International Marine Contractors Association) Diving Division Detailed Sheet Number 18 as per the IMCA Code of Practice on The Initial & Periodic Examination, Testing & Certification of Diving Plant & Equipment.

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"