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Product Details


This specialist watch case pressure tester is used for testing the water resistance of a watches seals and casing, although many watches are rated higher than 6atm pressure testers exceeding this rating are generally at least 4 or 5 times the price of this model. In our experience this tester is fine for determining if the vast majority of watches are water tight. One application which our dealers use them for is when a person claims that a watch with a screw down crown has leaked is to determine either whether it leaked because they failed to screw down the crown or if its a genuine failure of the watch itself, for this application a pressure tester is indispensable. They are also ideal for collectors of older dive watches or water resistant models who wish to test them prior using them for snorkelling or swimming.

The cylinder of the pressure tester is transparent, this enables you to observe which part of the watch is not waterproof because small bubbles will be apparent and in the test of the crown many dealers often find there are no bubbles from there or anywhere else indicating that the crown was not screwed down and saving them lots of hassles when the problem has simply arisen through customer error.  For routine seal failures it is also ideal because so you can see exactly where the problem is an determine what needs to be done.


  • Capacity: 1 or 2 watches can be tested at the same time
  • Material: Aluminium
  • Maximum test height: 72 mm
  • Maximum test width: 65 mm
  • External Pressure interface: 6 N
  • Pressure test range: 0.3 - 6 bar
  • Cylinder maximum pressure: 10 bar
  • Cylinder external diameter: 80 mm
  • Cylinder inside diameter: 65 mm
  • Cylinder height: 140 mm
  • Weight: 3.4 kg
  • Dimensions: 240 mm x 145 mm x 275 mm

How to Use the Pressure Tester

1. Firstly fill the cylinder with water up to the indicated level. It is preferable to use distilled water in order to avoid lime deposits.
2.Put the the watch(s) on the internal hook.
3.Replace the lid and screw it down tight by means of the 2 tensioning nuts on the top.
4.Using the lever raise the pressure to 3 atmospheres (requirement according to the official standard of the Swiss watch industry), and then wait for 3 minutes to allow air to enter the watch. You can increase pressure by cranking the handle a few more times.
5.Now immerse the watch into the water and immediately allow the air to escape by pressing the knob. While the pressure is falling, observe the watch(s) if small air bubbles are escaping from the case, this confirms there is a seal failure at the point of escape. In this case, lift the watch out of the water and replace the seal or return it to the dealer for testing.

Before testing the watch there is a bit of preparation as below.

  • Look for obvious reasons why the watch might not be waterproof like a chipped crystal faulty crown, cracked case or a loose back.
  • Look for signs of previous water damage. If water has entered the watch before it needs very thorough testing and there will obviously be a problem somewhere.
  • Change the battery prior to the test, This is common sense because if its a battery watch it always needs testing after a battery swap and there is no sense in having to test twice!

Watch Pressure Tester - Can Test 1 or 2 Watches up to 6atm / Approx 200ft or 60m

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