Features: 1.Sensor:Patent K-type sensor, 2.Temperature control precision:1 3.Can be added in inert gas ... precision: ±1RPM7.Choose the patent K-type sensor,8.Can be added in inert gas,protect the ... reaction from air.9.Can be added in temperature,pressure,PH value,electric sensor,to ensure precise ... experiment simplistic,the counter in the same operation can be realized in different environment or with ...