Figure 1. HMT140 features. The following figure illustrates the main features of HMT140. On the left is a remote probe model without display, and on the right is a fixed probe model with the optional display. The numbers and arrows indicate the main components of the HMT140 models. 1 HMT140 enclosure 2 Cable bushing: cable gland 3 Probe cable 4 HMP110 probe 5 Plastic grid filter