These instruments are certified for use in hazardous atmospheres and hostile working environments. The 3208 IS Digital Thermometer represents the best in temperature measurement technology for use in dangerous environments. Certified by BASEEFA, the UK’s leading Intrinsic Safety approvals house, the units are classified as EEx ia IIC T4. This certification is equivalent to EN 50 014:1997 & Amendments 1&2 and EN50 020:2002.