Raven SmartYield Pro User manual

SmartYield™ Pro Installation Manual
P/N 016-0171-566 Rev. C 12/15 E26333
Copyright 2015

While every effort has been made to ensure the accuracy of this document,
Raven Industries assumes no responsibility for omissions and errors. Nor is any
liability assumed for damages resulting from the use of information contained
herein.
Raven Industries shall not be responsible or liable for incidental or consequential
damages or a loss of anticipated benefits or profits, work stoppage or loss, or
impairment of data arising out of the use, or inability to use, this system or any of
its components. Raven Industries shall not be held responsible for any
modifications or repairs made outside our facilities, nor damages resulting from
inadequate maintenance of this system.
As with all wireless and satellite signals, several factors may affect the availability
and accuracy of wireless and satellite navigation and correction services (e.g.
GPS, GNSS, SBAS, etc.). Therefore, Raven Industries cannot guarantee the
accuracy, integrity, continuity, or availability of these services and cannot
guarantee the ability to use Raven systems, or products used as components of
systems, which rely upon the reception of these signals or availability of these
services. Raven Industries accepts no responsibility for the use of any of these
signals or services for other than the stated purpose.
Disclaimer

Table of Contents
016-0171-566 Rev. C i
Chapter 1 Important Safety Information................................................. 1
Electrical Safety ...................................................................................................................1
.....................................................................................................Instructions for Wire Routing 1
Instructions for Hose Routing ....................................................................................................3
Chapter 2 Introduction............................................................................. 5
SmartYield™ Pro Overview .......................................................................................................5
Installation Overview .................................................................................................................5
Kit Contents .........................................................................................................................6
Point of Reference ...............................................................................................................8
Care and Maintenance ..............................................................................................................9
Updates ..................................................................................................................................... 9
Chapter 3 Yield Sensor Installation...................................................... 11
Yield Sensor Installation Recommendations ........................................................................... 11
Yield Sensor Locations ......................................................................................................13
Yield Sensor Mounting ............................................................................................................14
Sensor Mounting Brackets ................................................................................................14
Yield Sensor Paddle Extension Plates ....................................................................................18
Bolt-on Paddle Chains .......................................................................................................18
Riveted Paddle Chains ......................................................................................................19
Chapter 4 Moisture Sensor Installation................................................ 21
Moisture Sensor Installation Recommendations .....................................................................21
Installation on the Clean Out Door ..........................................................................................21
Clean Out Door Mounting ..................................................................................................22
Installation on the Grain Tank Loading Auger .........................................................................23
Grain Tank Loading Auger Mounting .................................................................................23
Moisture Sensor Revisions .....................................................................................................24
Chapter 5 Header Cutout Switch Installation ...................................... 25
Factory Rotary Switch .............................................................................................................25
Connecting a Factory Rotary Switch Cable .......................................................................25
Connecting an Aftermarket Rotary Switch .........................................................................28
Chapter 6 SmartYield™ Pro Control Node Installation....................... 29
Control Node Installation Recommendations ..........................................................................29
Bracket Mounting ....................................................................................................................30
SmartYield Pro Node Harness Connections ...........................................................................31
SmartYield Pro Node Harness Connections .....................................................................31

Table of Contents
ii SmartYield™ Pro Installation Manual
CAN and Power Connections ............................................................................................31
Chapter 7 Envizio Pro™ Series Connection........................................ 33

CHAPTER
1
016-0171-566 Rev. C 1
C hapt er 1 Important Safety
Information
Read this manual carefully before installing the SmartYield™ Pro system.
•Follow all safety information presented within this manual.
•If you require assistance with any portion of the installation or service of the SmartYield Pro sensor system,
contact a local Raven dealer for support.
•Follow all safety labels affixed to system components. Be sure to keep safety labels in good condition and
replace any missing or damaged labels. To obtain replacements for missing or damaged safety labels,
contact a local Raven dealer.
When operating the machine after installing SmartYield Pro, observe the following safety measures:
•Be alert and aware of surroundings at all times.
•Do not operate any agricultural equipment while under the influence of alcohol or an illegal substance.
Please review the operation and safety instructions included with the implement and/or controller.
Electrical Safety
Do not reverse power leads. Doing so could cause severe damage to equipment. Always make sure that the
power leads are connected to the correct polarity as marked or instructed in this document. Ensure that the
power cable is the last cable to be connected.
Instructions for Wire Routing
The word harness is used to mean all electrical leads and cables, bundled and unbundled. When installing
harness, secure it at least every 30 cm (12in) to the frame. Follow existing harness as much as possible and
use these guidelines:
NOTICE
CAUTION

Chapter 1
2 SmartYield™ Pro Installation Manual
Harness should not contact or be attached to:
•Lines and hoses with high vibration forces or pressure spikes
•Lines and hoses carrying hot fluids beyond harness component specifications
Avoid contact with any sharp edge or abrading surfaces such as, but not limited to:
•Sheared or flame cut edges
•Edges of machined surfaces
•Fastener threads or cap screw heads
•Ends of adjustable hose clamps
•Wire exiting conduit without protection, either ends or side of conduit
•Hose and tube fittings
Routing should not allow harnesses to:
•Hang below the unit
•Have the potential to become damaged due to exposure to the exterior environment. (i.e. tree limbs, debris,
attachments)
•Be placed in areas of or in contact with machine components which develop temperatures higher than the
temperature rating of harness components
•Wiring should be protected or shielded if it needs to route near hot temperatures beyond harness
component specifications
Harnessing should not have sharp bends
Allow sufficient clearance from machine component operational zones such as:
•Drive shafts, universal joints and hitches (i.e. 3-point hitch)
•Pulleys, gears, sprockets
•Deflection and backlash of belts and chains
•Adjustment zones of adjustable brackets
•Changes of position in steering and suspension systems
•Moving linkages, cylinders, articulation joints, attachments
•Ground engaging components
For harness sections that move during machine operation:
•Allow sufficient length for free movement without interference to prevent: pulling, pinching, catching or
rubbing, especially in articulation and pivot points
•Clamp harnesses securely to force controlled movement to occur in the desired harness section
•Avoid sharp twisting or flexing of harnesses in short distances
•Connectors and splices should not be located in harness sections that move

016-0171-566 Rev. C 3
Important Safety Information
Protect harnesses from:
•Foreign objects such as rocks that may fall or be thrown by the unit
•Buildup of dirt, mud, snow, ice, submersion in water and oil
•Tree limbs, brush and debris
•Damage where service personnel or operators might step or use as a grab bar
•Damage when passing through metal structures
•High pressure wash
Instructions for Hose Routing
The word hoses is used to mean all flexible fluid carrying components. Follow existing hoses as much as
possible and use these guidelines:
Hoses should not contact or be attached to:
•Components with high vibration forces
•Components carrying hot fluids beyond hoses component specifications
Avoid contact with any sharp edge or abrading surfaces such as, but not limited to:
•Sheared or flame cut edges
•Edges of machined surfaces
•Fastener threads or cap screw heads
•Ends of adjustable hose clamps
Routing should not allow hoses to:
•Hang below the unit
•Have the potential to become damaged due to exposure to the exterior environment. (i.e. tree limbs, debris,
attachments)
•Be placed in areas of or in contact with machine components which develop temperatures higher than the
temperature rating of hose components
•Hoses should be protected or shielded if it needs to route near hot temperatures beyond hose component
specifications
Hoses should not have sharp bends
Allow sufficient clearance from machine component operational zones such as:
•Drive shafts, universal joints and hitches (i.e. 3-point hitch)
•Pulleys, gears, sprockets
•Deflection and backlash of belts and chains
•Adjustment zones of adjustable brackets
•Changes of position in steering and suspension systems
•Moving linkages, cylinders, articulation joints, attachments
•Ground engaging components

Chapter 1
4 SmartYield™ Pro Installation Manual
For hose sections that move during machine operation:
•Allow sufficient length for free movement without interference to prevent: pulling, pinching, catching or
rubbing, especially in articulation and pivot points
•Clamp hoses securely to force controlled movement to occur in the desired hose section
•Avoid sharp twisting or flexing of hoses in short distances
Protect hoses from:
•Foreign objects such as rocks that may fall or be thrown by the unit
•Buildup of dirt, mud, snow, ice, submersion in water and oil
•Tree limbs, brush and debris
•Damage where service personnel or operators might step or use as a grab bar
•Damage when passing through metal structures
•High pressure wash

CHAPTER
2
016-0171-566 Rev. C 5
C hapt er 2 Introduction
This document is provided to assist with the installation of the SmartYield™ Pro system components with a
Raven device such as an Envizio Pro series field computer.
To provide accurate yield information for harvest operations, both the Raven controller and the SmartYield Pro
system must be properly calibrated for the specific machine. Be sure to review all instructions for the specific
Raven device and use the table of contents for assistance with locating additional information and system
diagrams.
SmartYield™ Pro Overview
The Raven SmartYield Pro system may be used with the following Raven devices:
•Envizio Pro™, Envizio Pro II®, or Envizio Pro XL™
Additional settings and features of the SmartYield Pro system are detailed in the SmartYield Pro Calibration
and Operation Manual.
Installation Overview
Installation of the SmartYield Pro system varies depending upon the specific machine make, model, and model
year. Despite variations, the installation of the SmartYield Pro system will require the following steps:
1. Install the Raven field computer in the vehicle cab within reach of the vehicle operator. Review the display
installation manual for specific instructions.
CAUTION
Before calibrating the SmartYield Pro system,
be sure that all installation procedures have
been completed. Contact a local Raven dealer
for additional assistance.

Chapter 2
6 SmartYield™ Pro Installation Manual
2. Mount the SmartYield Pro control node on the outside of the vehicle cab. Before mounting the node, review
Chapter 6, SmartYield™ Pro Control Node Installation.
3. Mount the yield sensors to the clean grain elevator.
4. Mount the optional moisture sensor to the clean grain elevator or to the grain tank loading auger in the grain
hopper.
5. Install any required header switch hardware required for the specific harvester make and model.
Kit Contents
TABLE 1. SmartYield™ Pro Kit Contents
SmartYield Pro
Kit
SmartYield to
SmartYield Pro
Update Kit
Item Description Part Number 117-9000-002 117-9000-003
Node, SmartYield Pro 063-9000-002 1 1
Cable, SmartYield Pro 115-9000-010 1 1
Kit, Node Mounting 117-0171-299 1 1
Sensors, (Wired Pair)
Optical Yield 063-9000-006 1
Assembly, Yield Sensor
Optical Lens 063-9000-001 2
Bracket, Yield Sensor
Mounting 107-0172-134 2
Bracket, Universal Yield
Sensor Mounting 107-0172-143 2
Bolt, 1/4”-20 3/4”L Steel Hex
Machine 311-0049-103 4
Nut, 1/4”-20 Nylon Lock 312-4000-057 4
Magnet, Yield Sensor
Bracket 418-0000-013 4
Moisture Sensor Mounting
Kit 117-9000-012 1
Manual, SmartYield Pro
Installation 016-0171-566 1 1
Manual, SmartYield Pro
Calibration and Operation 016-0171-567 1 1

016-0171-566 Rev. C 7
Introduction
Additional Hardware Components
Paddle Extension Plates. An extension plate kit may be required for installations on older Gleaner, New
Holland, or Massey Ferguson harvesters. Plates may also be necessary for other harvesters if the SmartYield
Pro system has difficulty achieving a good calibration. Extension plates are typically only required on harvester
paddles with angled mounting brackets because angled mounting brackets (Refer to Figure 1, “Angled Paddle
Mounting Brackets,”) may result is inconsistent sensor readings. In some instances, moving the sensor
location towards the lift side may eliminate the need for extension plates.
FIGURE 1. Angled Paddle Mounting Brackets
Refer to the SmartYield Pro Calibration and Operation Manual for details on the calibration and to help
determine if extension plates are necessary.
Refer to “Yield Sensor Paddle Extension Plates” on page 18 for additional information on installing extension
plates.
TABLE 2. Paddle Extension Plates (P/N 117-0171-462)
Factory Potentiometer Tee Cables. Tee cables are available for many makes and models of harvester to
interface with the factory rotary potentiometer to monitor the header height during harvest operations.
Item Description Part Number Qty.
Plate, SmartYield Pro Paddle Extension 107-0172-129 40
Angled Paddle
Mounting Bracket
Extension Plate

Chapter 2
8 SmartYield™ Pro Installation Manual
FIGURE 2. Factory Rotary Potentiometer Tee Cables (D/N 054-9000-007)
Optional Components
TABLE 3. SmartYield™ Pro Installation Tool Kit (P/N 117-9000-009)
TABLE 4. Replacement Bit Kit (P/N 117-9000-010)
Point of Reference
The instructions in this manual assume that you are standing behind the machine, looking toward the vehicle
cab or operator’s position.
Item Description Part Number Qty.
Kit, Replacement Bit 117-9000-010 1
Arbor, 9/16” to 1-3/16” Hole Saw (7/16” Hex) 321-0000-429 1
Arbor, 1-1/4” to 6” Hole Saw (7/16” Hex) 321-0000-430 1
Square, 7” x 7” Rafter Square 321-0000-431 1
Extension, 12” Arbor (7/16” Hex) 321-0000-432 1
4” Hand File 321-0000-433 1
Item Description Qty.
Saw, 7/8” Hole 1
Saw, 3-1/4” Hole 1
Drill, 1/4” High Speed Pilot 1
Drill, 1/4” Pilot (for Bimetal Hole Saw) 1
Header Height Sensor Amp
SuperSeal Tee (P/N 115-9000-016)
(Used on certain models of Gleaner, Massey
Ferguson, Claas, and Challenger Harvesters)
Header Height Sensor Deutsch
DTM Tee (P/N 115-9000-018)
(Used on certain models of Case IH
Harvesters)
Header Height Sensor Deutsch
DT Tee (P/N 115-9000-017)
(Used on certain models of Case IH
Harvesters and Aftermarket Sensors)
Header Height Sensor WeatherPack
(Female Pins/Male Shroud)
Tee (P/N 115-9000-019)
(Used on Aftermarket Sensors)
Header Height Sensor WeatherPack (Male Pins/Male
Shroud) Tee (P/N 115-9000-021)
(Used on certain models of John Deere, Case IH,
and New Holland Harvesters)
Header Height Sensor AMP
AMPSEAL (P/N 115-9000-023)
(Used on John Deere S Series Harvesters)

016-0171-566 Rev. C 9
Introduction
Care and Maintenance
To achieve the best accuracy from the Raven SmartYield™ Pro system, perform daily and seasonal system
maintenance:
•When harvesting particularly oily crops, make sure that the grain sensor lenses and moisture sensor stay
reasonably clean.
•Cross-check moisture readings and grain density settings by measuring reference samples of the crop
when first starting harvest operations.
•Check and, if required, tare (zero) the yield reading with the clean grain elevator running empty.
•The clean grain elevator chain should be in good condition and properly tensioned before starting harvest
operations.
Updates
Updates for Raven manuals as well as software updates for Raven consoles are available at the Applied
Technology Division web site:
www.ravenhelp.com
Sign up for e-mail alerts to receive notice when updates for your Raven products are available on the Raven
web site.
At Raven Industries, we strive to make your experience with our products as rewarding as
possible. One way to improve this experience is to provide us with feedback on this manual.
Your feedback will help shape the future of our product documentation and the overall service
we provide. We appreciate the opportunity to see ourselves as our customers see us and are
eager to gather ideas on how we have been helping or how we can do better.
To serve you best, please send an email with the following information to
[email protected]
-SmartYield™ Pro Installation Manual
-016-0171-566 Rev. C
-Any comments or feedback (include chapter or page numbers if applicable).
-Let us know how long have you been using this or other Raven products.
We will not share your email or any information you provide with anyone else. Your feedback
is valued and extremely important to us.
Thank you for your time.

Chapter 2
10 SmartYield™ Pro Installation Manual

CHAPTER
3
016-0171-566 Rev. C 11
C hapt er 3 Yield Sensor
Installation
Yield Sensor Installation Recommendations
Inspect the harvester’s clean grain elevator prior to drilling any holes or mounting any brackets to the clean
grain elevator. Keep the following items in mind when selecting a location to mount the yield sensors:
•Yield sensor mounting location is critical for proper performance of the SmartYield Pro system. The sensors
should be mounted as high as possible on the clean grain elevator and should be offset from the lift side of
the elevator by a measurement ‘X’ specific for each make and model of harvester. Refer to the Yield Sensor
Locations section on page 13 for a table of yield sensor offset values.
Note: The ‘X’ measurement must be made perpendicular from the side wall on the lift side of the clean
grain elevator.
If your specific harvester make and model is not listed, contact a local Raven dealer or the Raven
technical support center for additional instructions.
•Depending on the paddle mounting bracket, the sensor installation bracket may vary. Refer to Figure 1,
“Sensor Mounting Options,” for sensor mounting location options.
FIGURE 1. Sensor Mounting Options
Lift Side
Sensor
Extension
Plate
Sensor
Grain
Angled Paddle
Mounting Bracket
RectangularPaddle
Mounting Bracket

Chapter 3
12 SmartYield™ Pro Installation Manual
FIGURE 2. Recommended SmartYield™ Pro Yield Sensor Mounting and Sensor Beam Alignment
•While the yield sensors provide some tolerance for misalignment when installed, it is important to align and
level the sensors as carefully as possible. A SmartYield Pro installation tool kit (P/N 117-0171-468) is
available with drill bits and a square which may be helpful with leveling and aligning the yield sensors during
installation.
Ideally, the yield sensors are mounted parallel with the ground when the vehicle is parked on a level surface
with the sensors aligned directly across the clean grain elevator from each other. Use a carpenters square,
level and any other tools to help level, align, and mark the yield sensor installation locations before drilling
any holes in the clean grain elevator.
•Check for moving components such as belts, chains, and access panels on the clean grain elevator. Ensure
the yield sensors and mounting brackets will not interfere with, or be struck during, normal equipment
operation.
It may be necessary to assemble the yield sensors and brackets and rough out the yield sensor installation
to verify clearances.
•It may be necessary to disconnect or move some components on some machine makes or models to allow
for yield sensor installation. Contact a local dealership or the machine manufacturer for additional
assistance with factory equipment.
•The yield sensors must consistently register individual paddles as they pass the sensor lenses. It is
recommended to open the clean grain elevator door and check or measure the location of the elevator
chain and verify the location for the yield sensors in the clean grain elevator wall.
Note: An extension tab kit (P/N 117-0171-462) may be required for installations on older Gleaner, New
Holland or Massey Ferguson harvesters. Tabs may also be necessary for other harvesters if the
SmartYield Pro system has difficulty achieving a good calibration.
Side View
Rear View
Sensor
Beam
Sensor
Beam
Elevator
Walls
Sensor
Offset ‘X’
Measurement
Lift
Side

016-0171-566 Rev. C 13
Yield Sensor Installation
FIGURE 3. Angled Paddle Mounting Brackets
Refer to the SmartYield Pro Calibration and Operation Manual for details on the calibration and to
help determine if tabs are necessary for your specific harvester. See the Yield Sensor Paddle
Extension Plates section on page 18 for details on installation of the paddle extension plates.
Yield Sensor Locations
Review the following table for the offset measurement
required for each specific harvester make and model. The
offset value (X) is measured from the wall on the lift side of
the clean grain elevator.
TABLE 1. Harvester Make and Model Offset
Measurements
Make Model ‘X’ Measurement
Inches Millimeters
Case IH
1460 1-3/8 35
1660, 2166 1-9/16 40
1680 2-3/8 60
2188/2388 2-3/8 inside
1-15/16 outside 60 inside 50 outside
Claas
Dominator 86, 96, 98 1-9/16 40
Dominator 106, 108, 118, 204, 218, Lexion,
Tucano 1-3/4 45
Dominator 112 CS, Comm 116 CS, 228 2-3/8 60
Avero 240 1-3/16 30
CNH CS, CSX 2-3/16 55
Duetz Fahr 4080 1-3/8 35 8XL 2-3/8 60
5690 HTS, 6095 HTS 2-9/16 65
Fiat L517 2-3/8 60
Fortschritt E514, E517 1-3/4 45
E524 1-9/16 40
Angled Paddle
Mounting Bracket
Optional Extension
Plate
Sensor
Beam
Sensor Offset ‘X’
Measurement

Chapter 3
14 SmartYield™ Pro Installation Manual
Yield Sensor Mounting
The SmartYield™ Pro yield sensors must be mounted to the clean grain elevator using the sensor mounting
brackets.
Sensor Mounting Brackets
Note: If the clean grain elevator is non-magnetic, use the supplied rivets to mount the yield sensors using
the provided brackets. Place the brackets against the elevator as a template and drill pilot holes for
rivets to mount the brackets.
Two sensor mounting bracket types are supplied in the SmartYield Pro kit:
FIGURE 4. Sensor Bracket Types
Select the type of bracket best suited for each yield sensor location and the clean grain elevator configuration.
Review the Yield Sensor Installation Recommendations section on page 11 and ensure that the sensors are
properly aligned before drilling any holes in the clean grain elevator. To mount the yield sensors using the
mounting brackets:
1. Insert a 1/4” bolt (P/N 311-0049-103) through the recessed side of the ceramic magnet assembly (P/N 418-
0000-013). The threaded side of the bolt should extend past the flat side of the magnet assembly.
2. Insert the bolt through the predrilled holes or slot in the mounting bracket tab.
3. Secure the magnets to the bracket using a 1/4” nut (P/N 312-4000-057).
Gleaner R-72 2-9/16 65
John Deere
1000 Series, 4425 1-3/16 30
1100 Series 1-15/16 50
Z Series (Belt/Chain) Drive, 2258, 9750 STS,
9660, 9760 2-9/16 65
4400 1 25
7720 Turbo 1-3/8 35
9500, 9600, 9650 2-3/8 60
Laverda 306LS, 25.5 2-3/8 60
Massey Ferguson 38, 40 2-3/8 60 29 2-3/16 55
760, 850 1-3/8 35
New Holland TX34, 36, 62, 64, 65, 66, 68, 78 TF42, 44, 46,
76, Elektra, TC, CX, 8070, 8080 2-3/16 55
TR 1-3/4 44
Make Model ‘X’ Measurement
Inches Millimeters
Universal Bracket
(P/N 107-0172-143)
Standard Bracket
(P/N 107-0172-134)

016-0171-566 Rev. C 15
Yield Sensor Installation
4. Measure and mark the desired installation location on the outside wall of the clean grain elevator. Refer to
the Yield Sensor Locations section on page 13 for machine specific measurements required for the yield
sensors.
FIGURE 5. Example Yield Sensor Mounting Location
5. Draw a line around the clean grain elevator to help locate the sensor installation location on the inside
(towards the harvester) of the clean grain elevator. Use a carpenters square (provided in optional
installation tool kit) or level to ensure that the sensors will be aligned properly.
Important:Check for any existing components which may interfere with or damage the yield sensors before
proceeding. Adjust or relocate the yield sensor mounting locations as necessary.
6. Measure from the lift side to the desired sensor location. Mark the same distance on the opposite side to
align the yield sensor mounting points. If necessary, review the Yield Sensor Locations section on page 13
for machine specific measurements required for the yield sensors.
FIGURE 6. Example of Locating and Marking Centers of Yield Sensor Pilot Holes
Outside of Grain
Elevator
Lift Side Lift Side
Outside of Grain
Elevator
Outside of Grain
Elevator
Lift Side
Center Mark for
Pilot Hole
Level Line used to
help locate Pilot
Hole on lift side of
Clean Grain
Elevator
Toward Front of Vehicle
Sensor Reading
Through Elevator
Across Lift Side

Chapter 3
16 SmartYield™ Pro Installation Manual
7. Drill pilot holes (bit provided in optional installation tool kit) at the marked locations. Use caution when
drilling the pilot holes and do not push the drill bit to full depth.
8. Once the pilot hole is drilled, use the bit to feel for a paddle or other components of the clean grain elevator.
If necessary, operate the elevator to move the paddles or other obstructions away from the drilling area.
9. If there is no issue with the pilot hole location, drill a 7/8” [22.5 mm] holes for the yield sensor on each side
of the clean grain elevator. A hole saw bit is provided in the optional installation tool kit for drilling the yield
sensor holes.
Note: Hole saw bits are designed for use at low speeds. Adjust the drill speed to the lowest speed
setting.
For elevators with limited access to the inside wall, use an extended drill bit to drill the sensor hole
on the inside elevator wall if the dimensions of the grain elevator allow. Be careful to level the bit or
drill to ensure that the sensors will align.
Mounting Yield Sensors
1. Remove the two jam nuts nearest to the sensor eye.
2. Slide the sensor body through the mounting bracket (towards the elevator) and replace the jam nuts. Leave
the sensor body loose until the sensor depth is properly adjusted.
FIGURE 7. Yield Sensor Body Jam Nuts
3. Thread the lens assembly onto the sensor body and tighten four to six revolutions.
4. Use the jam nut nearest to the sensor eye to secure the cap to the sensor body.
Sensor Jam Nuts