PROBLEM TO BE SOLVED: To provide a stalk liquid flow measuring sensor, a stalk liquid flow measuring device, and a stalk liquid flow measurement method capable of measuring stalk liquid flow of plants with stalks of small diameter, with high sensitivity and at low cost.SOLUTION: The stalk liquid flow measuring sensor 1 comprises a substrate 2 comprising insulating synthetic-resin films or sheets, or insulating sheets or thin plates of inorganic material, such as insulating ceramic wafers, a pair of thin-film metal temperature sensing resistors 3 and 5 prepared on its surface, a thin-film metal heater 4 formed in parallel between a pair of temperature sensing resistors 3 and 5, also a pair of conductive materials 6 extracting electrical signal from the thin-film metal temperature sensing resistors 3 and 5, respectively, and a conductive material 7 supplying current to the thin-film metal heater 4. Surface of the substrate 2 is coated by insulating material 8, after arranging the thin-film metal temperature sensing resistors 3 and 5 as well as the thin-film metal heater 4.COPYRIGHT: (C)2009,JPO&INPIT【課題】感度が良く、安価で、茎の直径が小さな植物の茎液流を測定することができる茎液流測定用センサ、茎液流測定装置及び茎液流測定方法を提供する。【解決手段】茎液流測定用センサ1は、絶縁性の合成樹脂フィルム又はシート、或いは、絶縁性のセラミックウェハなどの無機材料のシート又薄い板からなる基材2と、その表面に配置された一対の薄膜金属測温抵抗体3、5と、その一対の抵抗体3、5の間に並列に形成された薄膜金属ヒータ4、さらに、薄膜金属測温抵抗体3、5の電気信号をそれぞれ取り出す一対の導電性材料6、及び薄膜金属ヒータ4へ電流を供給する導電性材料7からなる。基材2の表面は、薄膜金属測温抵抗体3、5及び薄膜金属ヒータ4を配置した後、絶縁材料8でコーティングされている。【選択図】図1
