Figure 1. HMD65 Transmitter Parts Overview 1 Captive screw (2 pcs, cross-head) for attaching the lid of the transmitter. 2 Screw (2 pcs) for mounting the transmitter on the installation surface. 3 Transmitter lid. Open the captive screws of the lid to access input and output electronics. 4 Transmitter base. Contains the input and output connectors on the transmitter board: see Transmitter Board. 5 Cable gland (M16 x 1.5 lead-through) for leading wires into the transmitter. See HMD65 User Guide for cable gland and conduit options. 6 Alternative lead-through (M20 x 1.5) for wiring. 7 Probe body. Long (shown) and short probe options available: see Transmitter Dimensions. 8 Probe filter (default option: AISI 316L stainless steel). See HMD65 User Guide for filter options. 9 HUMICAP® sensor inside the probe filter. CAUTION Do not touch the sensor element.