描述
仪表系统保护接地电阻值一般为4Ω,最高不宜超过10Ω。当设置有高灵敏度接地自动报警装置或接地自动切断装置等情况时,接地电阻值可大于10Ω,但应在100Ω以内,当设置有防雷系统时,接地电阻不应大于1Ω;
SENSOR OMRON Z4W-V25R – REFURBISHED
TURBOMOLECULAR PUMP ALCATEL ATP 150 – NEW
VACUUM MANOMETER MKS 122BA-00100EB ( 100 TORR )
VACUUM MANOMETER TYLAN CMLB-21 (100 Torr) – REFURBISHED
CONVECTRON PIRANI VAC GAUGE GRANV-PHILLIPS 275 SET OF 3
CONTROLLER MKS 652D-BB – REFURBISHED