< Topic >This invention supply for the volatile substance or regards the non electric supply indicator which consists of the thermal color change characteristic material which is applied to the thermal feeder (1). The supply vessel being heated in order to evaporate the volatile substance which is accommodated in the device which is connected to the device (1), when it reaches to the temperature which is decided beforehand, the fact that it is the temperature where the resin make insertion which includes the thermal color change characteristic pigment (4) color of the indicator of form changes, is suited for supply is shown. The product where color changes may include thermal color change characteristic and the usual paint which are applied to the outer part surface of the device. In case of this system, when it reaches to the temperature which is decided beforehand, the fact that it is the temperature where color of the thermal color change characteristic paint changes, is suited for supply is shown.【課題】この発明は、揮発性物質用の供給ないしは熱供給装置(1)に適用される熱変色性材料からなる非電気的な供給インジケータに関する。装置(1)に接続されたデバイスに収容された揮発性物質を蒸発させるために供給器が加熱されて予め定められた温度に達すると、熱変色性の顔料を含む樹脂製インサート(4)の形態のインジケータの色が変化し、供給に適した温度であることを示す。色の変化する製品は、装置の外側表面に塗布される熱変色性及び通常の塗料を含んでもよい。この方式の場合、予め定められた温度に達すると、熱変色性の塗料の色が変化し、供給に適した温度であることを示す。
