The HMM100 can be ordered with a plastic or stainless steel probe. The plastic probe is available in two sizes, a standard one and an extended 400-mm-long option. The plastic probe is suitable for most applications.
The standard plastic probe and the steel probe have the same operational temperature range (-70 °C to +180 °C). The extended 400-mm plastic probe is suitable for temperatures ranging from -70 °C to +120 °C. Note that the operational temperature range is also affected by the filter; see Filter Types.
Figure 1 shows the plastic probe with a membrane filter (top), and the stainless steel probe with a sintered stainless steel filter (bottom).