Which Products are Involved?
SRV, SRD, DVM, DVP, SME-TR/TRD.
For SME-TR/TRD (Outdoor Mount) transmitter. Visit our product page to learn more about the full features.
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What is the purpose of this article?
To give guidance and highlight good practices when preparing Rheonics sensor cables with a crimp of length 8mm and terminal diameter 1mm. The terminals of the SME-TR/TRD are rated for wires of 0.2 - 1.5 mm2 i.e. AWG 24 - 16.
1. Tools and BoM list
Crimping tools are used to deform materials and create connections. To connect wires together or to other connectors, crimping is commonly used in electrical work.
Precision Micro Wire Cutter
A wire cutter or cable cutter is a tool that cut wires and cables in a safe manner without damaging the insulation or conductors.
A Measure Tape is a tool used to measure length.
Wire strippers are portable handheld tools used by workers, especially electricians, to remove the protective coating of electric wires for replacement or repair.
Tool used to cut wires or cables.
A durable, permanent connection can be created by joining conductive metal elements with solder. Soldering machines are essential tools for building, modifying, and repairing electronics.
Hot air gun
Heat guns are devices that emit a jet of compressed air toward a particular point or surface.
Manufacturer Part Number
Vendor Part number
Heat Shrink tube
Correct ferrule size must be selected based on the gauge of the wire, as a standard Rheonics uses ferrule with a pin length of 8mm and diameter of 1mm.
Solder wires are wires with a low melting point, used to create joints using a soldering iron.
Heat shrink tube
Heat shrink tubing is a common element in most electrical installations that protects wires from moisture, dust, abrasion, and sharp objects that might otherwise damage them.
Figure 11. Cable gland.
2. Cable Lenght
Take the cable and cut the required length for your application by measuring with tape. We recommend stripping out the cable sheath at 18 cm (7 inches) from the end as a suitable length to prepare the cables for attachment to SME-TR/TRD.
Figure 12. Cutting cable to the correct length.
Strip out the sheath with the help of the cutter and a previous cut.
4. Cutting´s cable shield
Loosen the metal shield from the black cable cover and cut it out.
Figure 14. Removing the cable shielding to get access to the internal wires.
5. Cable gland installation
Take the cable gland and open it up into 3 parts as shown below – Part 1(Cap), Part 2(Cable holding part with packing), and Part 3(Body).
Pass Part 1 and Part 2 through the cable as shown.
Open up the metal shield and cut it a bit shorter.
Fold the metal shield back on the plastic insert(part-2) . That way the metal shield makes electrical contact with the cable gland and this is the grounding for the TR/TRD case.
Make sure that the shield is in contact with the cable gland.
Press Part 3 onto Part 2 and rotate it so it goes all the way to the end.
Take Part 1 and tighten over Part 3. Part 2 is completely enclosed by Part 1 and Part 3.
It is important that the metal shield from the cable is in contact with the cable gland so the electronics housing is connected to the sensor cable shield like in figure 20.
6. Stripping the wire ends
Stripping the wire at 9mm from the end with the stripping tool.
7. Properly usage of crimpers
Your crimping tool should have a nest for inserting the terminal. After inserting in the correct slot, squeeze the crimp tool firmly and release it to get a long-lasting, tight fuse.
Unused wires should be neither stripped nor crimped. We recommend protecting the ends with a shrink tube to avoid the ends making any electrical contacts.
We recommend crimping the ferrules on two sides instead of 4 sides as they work better with the terminals on the SME.
Twist the wire and Crimp them (Crimpers) using the Crimping Tool.
Final results after crimping all wires from the sensor cable.
8. Grounding of the SME TR/TRD
The grounding in the SME TR/TRD is achieved with the ground lug shown in figure 26.