Ngk Insulators, Inc.

Rui Sakaguchi

Yusuke Watanabe

Takao Murase

Masashi Yasui

The heaterof the heater portion includes the linear portionsand the bend portions. A resistance value per unit length of the bend portionsat least at a temperature within a temperature range of no less than 700&#xb0; C. and no more than 900&#xb0; C. is lower than a resistance value per unit length of the linear portions

Ceramic heater, sensor element, and gas sensor

A heater unit includes a heaterhaving first bend portions(to) and second bend portions(to). The first bend portionsare turns present in a maximum-temperature area (first area) where the maximum temperature is reached during heating among areaswhere the turns have a narrower pitch and having apexes facing each other in the short-length direction (left-right direction) of a ceramic substrate. The second bend portionsare turns present in areaswhere the turns have a wider pitch and having apexes facing each other in the short-length direction. The distance X[mm] between the first bend portionsfacing each other is larger than the distance X[mm] between the second bend portionsfacing each other.

A heaterof a heater portion includes linear portionsand bend portions. A resistance value per unit length of the bend portionsat least at a temperature within a temperature range of no less than 700&#xb0; C. and no more than 900&#xb0; C. is lower than a resistance value per unit length of the linear portions

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Nagoya, Japan

Rui Sakaguchi