... to usersrequirements. Working condition1.Ambient temperature:-15-+402.Altitude:<1000m3.Relative humidity:<90%4.Environnment exists with out gas,steam,chemical deposition ... .Ambient temperature: -15°C~+40°C 2.Altitude: <1000m 3.Relative humidity: <90% 4.Environment exists without gas, steam, chemical deposition, dust ...