PROBLEM TO BE SOLVED: To provide a circuit internal pressure sensor unit connectable independent of the type of the console.SOLUTION: A circuit internal pressure sensor unit 100 which measures the internal pressure of a liquid circuit 200 and which is connected to one selected from among three or more types of consoles 300 with a different supply voltage V1 and transmits the measurement result, the circuit internal pressure sensor unit 100 comprising: a sensor 111 for converting the internal pressure of the liquid circuit 200 into a measurement signal S1 a reference voltage generation circuit 121 for generating a reference voltage V2 on the basis of the supply voltage V1 supplied from the console 300 a determination circuit 122 which compares the reference voltage V2 with the supply voltage V1 supplied from the console 300 to determine that the supply voltage V1 is any of the voltages and an amplifier circuit 123 which has three or more amplification modes selectable according to the determination result and amplifies the measurement signal S1 to an output signal S2.COPYRIGHT: (C)2016,JPO&INPIT【課題】コンソールの種類を選ばずに接続することができる回路内圧センサユニットの提供。【解決手段】液体回路200内の圧力を測定し、供給電圧V1の異なる3以上の種類のコンソール300から選ばれた一つに接続されて測定結果を送信する回路内圧センサユニット100であって、液体回路200内の圧力を測定信号S1に変換するセンサ111と、コンソール300から供給される供給電圧V1に基づき基準電圧V2を発生させる基準電圧発生回路121と、基準電圧V2とコンソール300からの供給電圧V1とを比較することにより供給電圧V1がいずれの電圧であるかを判別する判別回路122と、判別結果に応じて切り替えて選択される3以上の増幅モードを有し、測定信号S1を出力信号S2に増幅する増幅回路123とを備える。【選択図】図3
