Greisinger ges 130 insertion temperature sensor for soft media greisinger ges 500 the greisinger ges 500 is an insertion temperature sensor for soft media the probe is fitted with a with a k type thermocouple input and would suit the temperature gauge greisinger gth 1150 this sensor is thin just 3mm in diameter this makes the sensor especially fast because its small mass is quickly heated or cooled the probe can be used with any temperature measuring instrument that is designed to accep