You are here: Home Products Anaesthesia Vaporizers Sigma Delta Sigma Delta The Sigma Delta vaporizer delivers accurate concentrations under varying conditions of flow rate and temperature, particularly at low flow. Sevoflurane, Isoflurane, Halothane Key Fill, Quik Fil®, or Pour fill Selectatec®, Dräger Plug-In®, North American Dräger, Dräger Auto-Exclusion®¹, Cagemount compatible Superb performance, particularly at low flow Service Free* Low body weight Internationally recognised, award-winning design *Presumes ten year product life requiring no preventive maintenance service. It is recommended that a service is carried out at ten years. Halothane vaporizers require a five year service. ¹Auto-Exclusion not available in the US. Downloads Sales Literature (EN) PDF 474 KB Sales Literature (US) PDF 480 KB Sales Literature (EZ) PDF 533 KB Declaration of Conformity PDF 131 KB CE Certificate PDF 170 KB