Hélène is currently conducting an ethnographic study in a Californian facility that is at the origin of a new cutting edge “technology” to manage Type 1 diabetes: Diabetic Alert Dogs. In her presentation, she will investigate how dogs' noses are transformed into “reliable sensors” capable of alerting and giving feedback to human beings about the state of their bodies 20 minutes faster than any machine on the planet. She will explore how this facility is a space where not only new accurate instruments are produced, but also new definitions of what “accuracy,” “objectivity,” “proof,” and “responsibility” mean that considerably enrich our scientific repertoire and how we engage with machines.