美國Stonel公司閥位回訊器,限位開關(guān),閥位信號反饋裝置
STONEL 閥位回訊器分為6個系列
分別為Eclipsc,Visual Indicator,Quartz,SolaR,Onxy,Hawkeye

QX2HR02SRA-PTWS1,
QX2VR06SRA-PTNJ6,(QZE2VP5DSS),
QX2VR02SRA,
QN2NC02SRA-PTBL1(QZP2NE2R),
QZM2VE2R,
QZM2VE3RCPLH1,
AMI331HA02SRA-PTQL1,
QZP44E1R,
QZP4NE2R,
QZM2VE2R-PTLH2,
QG14C02SRA-PTZX1
QZP4HB2DSS-K,
ECG3313R,
ECG3313DS,
QZP2NE2R,
ECN4405R,
SEH90,
HK3077SG,
HK3077SR,
QUARTZSEH90,
ECN3302R EN33C02RA
ECN9602R EN96C02RA
ECG3323R EG33C23RA
ECG9623R EG96C23RA
ECN3302F EN33C02FA
ECN9602F EN96C02FA
ECG3323F EG33C23FA
ECG9623F EG96C23FA

QZE33C5R QN33D05SRA
QZE33E5R QX33R05SRA
QZE96C5R QN96D05SRA
QZE96E5R QX96R05SRA
QZI2JC2R QN2JC02SRA
QZM2VC2R QG2VC02SRA
QZM2VE2R QX2VE02SRA
QZM14C2R QG14C02SRA
QZM14E2R QX14E02SRA
QZP33C2R QN33C02SRA
QZP33E2R QX33E02SRA
QZP5OC2R QN5OC02SRA
QZP5OE2R QX5OE02SRA