| Typical at 23 °C and 24V DC unless otherwise 
                        stated | Series 60 ionisation (standard/ 
                        integrating) | Series 60 optical | Series 60 Grade 1 heat 
                        60°C | Series 60 Grade 2 heat 
                        65°C | Series 60 Grade 3 heat 
                        75°C | Series 60 Range 1 heat 
                        80°C | Series 60 Range 2 heat 
                        100°C |