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MIL-STD-810 Method 512 Immersion Testing

This test method is used to evaluate the equipment's resistance and performance when submerged in water or other liquids and assesses the equipment's ability to withstand and operate in submerged conditions, such as underwater or wet environments. 

Clark Testing conducts MIL-STD-810, Method 512 immersion testing to evaluate the equipment's resistance to water ingress, material degradation, electrical conductivity, and functional performance in submerged conditions. During the MIL 810G immersion, Clark’s test engineering team will identify potential issues related to waterproofing, sealing effectiveness, corrosion resistance, and other performance-related factors. 

The intention of this test method is for material that may be exposed to partial or complete immersion, with or without operation. This test may be used to verify watertightness in lieu of a rain test, provided the materiel configuration would be the same for both situations, and the method of water ingress is well understood.  


We help Clark’s customers select the appropriate procedures for conducting immersion testing which typically involves fully or partially submerging the equipment in a controlled liquid environment, such as water, for a specified duration. The Clark test engineers will develop a test plan that includes immersion depth, temperature, and duration based on the equipment's intended use and the expected environmental conditions. 

The immersion test criteria include allowable water ingress, functionality during and after immersion, corrosion resistance, and other performance parameters. Clark will assess the equipment based on its ability to withstand the specified immersion conditions without sustaining damage or exhibiting performance degradation beyond acceptable limits. 

MIL-STD-810, Method 512 includes two test procedures, Procedure I (Immersion) and Procedure II (Fording).  

To determine the appropriate procedure to use Clark’s test engineers work with our customer to consider: 

  1. The operational purpose of the materiel determining the functions to be performed by the material when partially or completely immersed in water.
  2. The natural exposure circumstances.
  3. The test data required to determine whether the operational purpose of the material has been met.

 The difference between procedures involves some degree of immersion.  Procedure I, immersion primarily addresses leakage during immersion of encased material, while Procedure II (Fording) focuses on vehicles traversing a body of water or material secured to such vehicles. 

 After determining the procedure, the following parameters must be selected: 

  • test levels and conditions must be selected 
  • Identify climatic conditions 
  • Determine exposure conditions 
  • Test item configuration 
    • Enclosed in a shipping/storage container or transit case 
    • Protected or unprotected 
  • Deployed realistically or with restraints, such as with openings that are normally covered 
  • Conditioning temperature 
  • Depth of immersion 
  • Depth of fording 
  • Material fording 
  • Duration of immersion or exposure. 

 The test engineering team at Clark Testing can help assess the exposure of the equipment and select the appropriate test method in order to qualify your equipment for MIL-STD-810 Method 512. 

Call or email the test engineering team at Clark Testing. We can help assess the exposure of the equipment and select the appropriate test method to qualify your equipment for MIL-STD-810 Method 512 

Test Set Up

In house custom design and fabrication capabilities (machining and welding) to ensure test fixtures accurately simulation environmental conditions.  FEA capabilities to support fixture design along with welding, fabrication & machining services.  Multiple vibration adapter plates and prefabricated test fixtures help to streamline the testing process.

Instrumentation capabilities including accelerometers and strain gages with multi-channel control and data acquisition equipment ensuring accurate test data is being recorded.  All instrumentation and equipment is provided with measurement uncertainty and compliant   with Clark’s ISO 17025-2017 Quality Program.

Lab technicians and engineers record daily test activities to register all activities, events, and responses during the test.  The daily test logs along with test data, pictures and test procedures are included in comprehensive test report that is the industry standard.

 We work closely with you to validate engineering, ensure quality, analyze test spectrums, and execute accurate testing programs for successful qualification and marketing of your product.

We work closely with you to validate engineering, ensure quality, analyze products and qualify equipment while supporting the time constraints and product cycles that are vital to your success.

Paul Heffernan, CEO of Clark Testing