| Picture | Model | Name | Feature |
 |
XWCJ series | automatic balanced recorder | SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD |
 |
XQBJ series | automatic balanced recorder | SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD |
 |
EL series | automatic balanced recorder | SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD |
 |
EH series | automatic balanced recorder | SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD |
