Which brand is the best waterproof industrail handset?

It is often confusing for an engineer to know what type of IP Rating they need to look for when they desire to have a “waterproof” enclosure.   

What is an IP Rating?

An IP Rating (Ingress Protection Rating) is the rating used to classify the different levels of sealing effectiveness provided by an electrical enclosure against foreign bodies such as objects, water, dirt, etc.

IP Rating Chart

For telephone handset, the typical waterproof IP ratings are IP67, IP66, and IP65 enclosures.  The chart below gives the specifics of what these ratings mean and how they are measured.
IP Rating Protection Description Test Method
IP65 Enclosures Able to protect against water jets Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects. Test duration: at least 15 minutes
Water volume: 12.5 litres per minute
Pressure: 30 kPa at distance of 3 m
IP66 Enclosures Able to protect against powerful water jets Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects. Test duration: at least 3 minutes
Water volume: 100 litres per minute
Pressure: 100 kPa at distance of 3 m
IP67 Enclosures Able to protect against Immersion up to 1 m Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion). Test duration: 30 minutes
Immersion at depth of at least 1 m measured at bottom of device, and at least 15 cm measured at top of device
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Yuyao Xianglong Communication Industrial Co., Ltd.
SINIWO products are of international quality system certification authority, safety system certification, so that customers get a greater quality and safety in use.
A leading manufacturer of Industrial telephone equipment for 17 years in China
Founded in 2005,is a production and sales of outdoor phone accessories and machine-based manufacturing company.
Advanced equipment,modern production line,make the accessories products reached 3,000pcs.
More than 90% component of products made by the company own production.
ISO9001 quality system certification, CE certification, all kinds of test report.
More than 95% of products are exported to North America, Western Europe, Southeast Asia and other regions.