Depth gauges are an integral part of the diver’s scuba diving console. There are five types of gauges in use today:
- Capillary Gauge
- Analoge Depth gauges (Open Bourdon Tube gauge, Oil-filled,
gauge, Diaphragm gauges.
- Digital Gauges (computers)
Capillary depth gauges are very inexpensive with a simple piece of clear tubing, sealedat one end and open at the other. When you dive the water goes in the tube by the ambient pressure. At 10 m it is half the length of the tube, 20 m a third, etc based on Boyle’s Law. They are hard to read accurately at much deeper than 10 m. Mark 25 is free from these disadvantages. My invention allows you to get a well-readable scale on any range. Accurate and mainly used when diving at altitude.
This is the most accurate and safe depth gauge and this is the only one type of gauges that always displays correctly and they can be used as a reference for testing other type of depths gauges.
Discussion about capillary depth gauge on Scubaboard
Many mechanical depth gauge with differences type of sensor, open bourdon tube gauges, oil-filled and diaphragm gauges has a good accuracy and readable.
Please note: All gauges are a simple way of measuring a given pressure and
cannot be relied on 100% unless calibrated. Use gauges as a gauge of indication
to the amount shown. As with all Digital and Analogue follow manufactures.
Shown in the photo - PD80 Analog wrist depth gauge with nylon NATO strap, 64 mm diameter ABS case from SUNLINE
When buying a computer we will find different options of models, colors, prices, size, brand, etc.
Look for the computer that suits your needs and budget, there are plenty of options to choose from.
If you are looking to buy your first dive computer, we recommend you opt for a simple, mid-budget model, whereas if you already know you want to make the leap to a more sophisticated, high-end dive computer.
For entry levels and learning of diving there are also more basic and budget friendly models such as Mark 25, which offers all the basic functionality, for to learn how to control your diving depth and float up the tables correctly, easy to use and a more affordable price.