When the oil temperature is higher, the resistance value is lower. The lower the oil temperature, the greater the resistance value. Working range: 0-120 degrees. Alarm temperature: 97 ± 2 degrees. When the oil temperature reaches the alarm temperature and the alarm switch is closed, the alarm light will turn on. When the oil temperature decreases and the alarm switch is turned off, the alarm light will be turned off. When the alarm temperature is reached, the response time is approximately 1 second. The oil temperature sensor has 2 wires, one is connected to the oil temperature meter, and the oil temperature parameter is displayed. The other one is connected alarm switch. Application: crude oil engine. Colour: as shown in the picture. Material: metal. Size: 21mm. Package Contents: 1 x oil temperature sensor. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.