보호등급 – (주)삼사원 Samsawon Inc

첫째자리

First characteristic numeral	Protection against contact and foreign bodies	Personal protection against access to dangerous parts with
0 1 2	Not usual for pressure gauges and temperature measuring instruments	—
3	Protection against ingress of solid bodies over 2.5mm in diameter (small particles).	Tool
4	Protection against ingress of solid bodies over 1mm in diameter (grain-sizedl particles).	Wire \| 1mm dia.
5	Protection against harmful deposits of dust. The ingress of dust is not totally prevented, but the dust cannot enter in an amount sufficient to interfere with the satisfactory operation of the equipment enclosed.	Wire \| 1mm dia.
6	Protection against ingress of dust (dustproof).	Wire \| 1mm dia.

Second characteristic numeral	Degree of protection
Second characteristic numeral	Brief description	Definition
0	No protection	Not usual for pressure gauges and temperature measuring instruments
1	Protection against drops water	Vertically falling drops of water shall have no damaging effect.
2	Protection against drops water when case in titled up to 15˚	Vertically falling drops shall have no damaging effect when the case in titled up to 15˚ from the vertical to either side.
3	Protection against spraying water	Water spraying at an angle up to 60˚ to either side from the vertical shall have no damaging effect.
4	Protection against spraying water	Water spraying against the case from all direction shall have no damaging effect.
5	Protection against water jets	Water spraying as jet against the case from all directions shall have no damaging effect.
6	Protection against strong water jets	Water as strong jet directed against the case from all directions shall have no damaging effect.
7	Protection against immersion in water for a limited period of time	Water must not enter in a quantity which cause a damaging effect when the case is immersed in water under conditions of agreed pressure and time.
8	Protection against continuous submersion in water	Water must not enter in quantities which can cause damage when the case is continuously immersed in water under conditions agreed between manufacturer and user. The conditions must be more stringent than those stipulated under Code digit 7.