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Forum Post: LMP91200 pH sensor

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Dear team, My customer is very interesting in the LMP91200 . The pH sensor connect to the LMP91200 and the INA116 , and they look some difference in below figures(left: LMP91200 ; right: INA116 ). By using the same pH sensor… Is the INP connection the same as IN+ in the INA116 ? Is the VCM connection the same as IN- in the INA116 ? What’s the GUARD potential should be connect to(INP or Ground or …)? Is it the same as solution ground in the INA116 ? Thanks~~~

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