Sensor applications in agricultural machinery

If you're designing or building machinery for the agricultural market, you'll already be aware of the onward march of "˜smart' farming. As part of the many sensor technologies now widely employed in it, where sophisticated monitoring and control is now universally applied to optimise crop production, mobile agricultural machinery manufacturers are increasingly utilising precision sensors as part of the equipment and systems they produce.

Variohm EuroSensor has been involved in a number of applications with UK and European farm machinery manufacturers for position, load, pressure and temperature sensors, with almost all of them installed in harsh outdoor environments where temperature extremes as well as shock and vibration conditions exist - and absolute reliability is essential.

These applications range from angle sensors in four-wheel steering systems that allow farm machinery to more precisely manoeuvre in tight spaces to linear position and load sensors that are part of advanced mobile autonomous vehicles linked to the Global Navigation Satellite System (GNSS) for vehicle guidance and load weight measurement. Various types of sensors serve numerous measurement tasks. Some are configured open loop with the position or load information simply fed to a visual display to allow manual operation of a process. Other automated and autonomous machine tasks involve the sensing component as part of closed loop systems where multiple functions are synchronised, for instance with vision systems and linear motion positioners or rotary actuators for tasks such as in-row weeding or selective crop harvesting. The high-precision angle and linear position sensing technologies offered by Variohm include potentiometric-based sensors where there is a physical contact between a conductive plastic track and wiper contact in a housed assembly. As the sensor is extended or rotated, the position information is provided as a linearly proportional voltage measurement.

For rotary angle sensing, Variohm offers two Hall Effect technologies where there is no contact between a fixed sensing element and a rotating magnet. Whilst these sensor types do not differ in the actual way the sensing takes place, they can be differentiated by being the first "˜non-contacting' type, says Variohm - they have an enclosed and housed assembly complete with bearings (so there is a degree of contact involved) - and a second type of "˜touchless' sensor where the sensor and magnet are supplied as separate components and mounted by the customer between the fixed and rotating components. Variohm manufactures a range of Hall Effect angle sensors that it says are well suited to agricultural applications. Three mechanical design formats with encapsulated sensor electronics form the Euro-XP, XPD and XPK series. The XP and XPD are durable, housed versions featuring optional "˜U' or "˜Spring' shaft drives and a D-shaft drive respectively, both with flange mounting and integral bearings. The third version, the Euro XPK, is a two-part "˜puck and magnet' contactless design.

Long life, low maintenance and best reliability

Variohm's range of angle sensors also covers non-contacting sensor technologies with multi-turn capability so that (if attached to ballscrew or leadscrews for instance) they can be calibrated to measure travel length. For linear position measurement based on non-contacting measurement principles, magnetorestrictive technology and variations that offer added reliability are available. As separate two-part rod and sensor components, they are assembled inside hydraulic cylinders ("˜in-cylinder') for position feedback or mounted alongside multiple cylinders typically for telescopic boom control. They are also available as robust housed components where a linear support bearing is used. Clearly, as wear and working life are important aspects for agricultural use, the sensors that necessitate contact between sensing elements are possibly less favoured than non-contacting and touchless sensors. Also, in terms of robustness, where the separate sensor and magnets can be epoxy-potted and effectively protected from air and liquid ingress, these technologies are perhaps favoured for the most arduous tasks where long life, low maintenance and best reliability can be assured.

For medium-precision linear position sensing, and especially useful for long distance measurement, the cable extension sensor combines a rotary sensor on a cable winding drum and a spring-assisted winch mechanism. As the cable extends from the drum it rotates the shaft driving the internal rotary sensor. The sensor technology used in the cable extension sensor can be potentiometric (sometimes called a string pot sensor) or incremental or absolute encoder. Across this wide choice of position sensor types, accuracy, linearity, repeatability and other factors such as IP rating (up to IP69K), shock and vibration durability can be tuned to the application. The same applies for electrical input levels and electrical output requirements which cover analogue, ratiometric and many choices of digital output including CANopen, SAE J1939, SSI, and many more. Variohm also offers custom modification of electrical and mechanical interfacing to make customer installation as easy as possible.

Variohm's range of pressure sensors are used in hydraulic systems as well as engine pressure measurement. Combined pressure and temperature sensors are usefully applied to process related tasks in crop storage, farm fertiliser-dispensing machinery and hydraulic control management. Load cells, from a range of product types used by the weighing industry and scale manufacturers, are in widespread use for bale weighing and load sensing for harvested crops in both silos and mobile agricultural machinery. The load cells are well proven in similar applications in the construction industry, large commercial transportation vehicles and more. Variohm's temperature sensors are extensively used by manufacturers of instrumentation systems for measuring ground temperatures and as part of other environmental measurement equipment.

Learn more about sensor applications in agricultural machinery at www.variohm.com.

Variohm-EuroSensor Ltd

Williams Barn
Tiffield Road
Towcester
NN12 6HP
UNITED KINGDOM

+44 (0)1327 351004

sales@variohm.com

www.variohm.com

More from Variohm-EuroSensor Ltd

Six new linear position sensors now available

Posted 3 days ago

Machine safety without SIL: WDG series redundant encoders from Wachendorff

Posted 1 month ago

New environmentally sealed pressure switch

Posted 4 months ago

Roll feed and winding web length measurement

Posted 4 months ago

New system combines weight and temperature measurement

Posted 8 months ago

Novotechnik TF1 series linear sensor for demanding applications

Posted 9 months ago

Variohm launches low-power series of pressure sensors

Posted 10 months ago

Promotional pricing for absolute encoders with IE interface

Posted 10 months ago

Versatile pressure switches operate with most liquids and gases

Posted 11 months ago

Load sensor is rated to 500N and protected to IP69K

Posted 11 months ago

Magnetic angle sensors now available with J1939 interface

Posted 1 year ago

Pressure switches for hydraulic systems safety monitoring

Posted 1 year ago

Miniature programmable Hall effect angle sensor is smallest yet

Posted 1 year ago

Programmable Hall effect rotary sensor with custom options

Posted 1 year ago

Würth selects Variohm NTC ring terminal temperature probe

Posted 1 year ago

Variohm Group acquires displacement sensor specialist Positek

Posted 1 year ago

New miniature programmable angle sensor customised to order

Posted 1 year ago

Wiring harnesses have sensors to monitor motor temperature

Posted 1 year ago

Variohm's range of weighing indicators simplifies integration

Posted 1 year ago

Draw wire position sensors used in flight simulators

Posted 1 year ago

Variohm's EPT12R pressure sensor has titanium wetted parts

Posted 2 years ago

Procusini 3D food printer relies on NTC temperature sensors

Posted 2 years ago

Variohm offers Contelec non-contacting angle encoders

Posted 2 years ago

Robust diaphragm pressure switching up to 10 bar

Posted 2 years ago

Variohm's application-customised sensors bring benefits for OEMs

Posted 2 years ago

Novotechnik TFD-4000 series short-stroke touchless transducers

Posted 2 years ago

Compact encoder offers high speed motion PLC synchronisation

Posted 2 years ago

ADZ's SMO pressure sensor for functional safety applications

Posted 2 years ago

ADZ differential pressure transmitter for train braking

Posted 3 years ago

ZEMIC chosen for agricultural produce-handling machinery

Posted 3 years ago

Novotechnik launches RFX-6900 touchless technology angle sensor

Posted 3 years ago

Novotechnik sensors with IO-Link communications for Industry 4.0

Posted 3 years ago

ZEMIC miniature load cell for med-tech

Posted 3 years ago

Contelec Vert-X 05E encoder suits heavy-duty machinery

Posted 3 years ago

Pressure switch for injury treatment

Posted 3 years ago

ZEMIC BM24R ring torsion load cell has ATEX and IECEx approvals

Posted 3 years ago

Variohm Holdings acquired by Acal plc

Posted 3 years ago

Contelec's Vert-X 79 rotary encoder for heavy-duty applications

Posted 3 years ago

Variohm EuroSensor and Ixthus achieve 2015 ISO approvals

Posted 3 years ago

Miniature load cell for audio equipment

Posted 3 years ago

Variohm EuroSensor offers component overmoulding service

Posted 3 years ago

Contelec Vert-X 48E non-contacting magnetic sensor at Variohm

Posted 3 years ago

Contelec's Vert-X 37MT Hall Effect encoder at Variohm

Posted 4 years ago

Puck and magnet option in Euro-X Hall Effect angle sensor range

Posted 4 years ago

Hexagonal bolt temperature probes used for multi-band receivers

Posted 4 years ago

ZEMIC load cell used for airline cabin luggage weighing machine

Posted 4 years ago

ZEMIC load cell selected for cabin luggage weighing machine

Posted 4 years ago

Pedal force sensor saves hard work on electric bike

Posted 4 years ago

BEI's new LP series encoders suit extreme environments

Posted 4 years ago

Linear position sensors for professional mountain bike set-up

Posted 4 years ago

Durable rotary position sensing from Variohm EuroSensor

Posted 4 years ago

Novotechnik's TF1 linear position sensor available from Variohm

Posted 4 years ago

Novotechnik touchless technology angle sensor now with CANopen

Posted 4 years ago

VTP11 rotary sensor: D-shaft mount, resistive element technology

Posted 4 years ago

Wachendorff length measurement systems from Variohm EuroSensor

Posted 4 years ago

Intrinsically safe pressure and level switching components

Posted 4 years ago

Linear position sensors provide high accuracy steering

Posted 4 years ago

DesignFlex pressure switches aid improved DNA sampling process

Posted 4 years ago

ZEMIC strain gauges added to Variohm EuroSensor product range

Posted 4 years ago

Variohm supply draw wire sensors for lifting bridge application

Posted 4 years ago

Variohm adds 8mm D-shaft option to Hall Effect angle sensor

Posted 5 years ago

Variohm adds new Celesco SK series cable extension sensors

Posted 5 years ago

ZeroK specify Variohm VLP position sensor in electric kart

Posted 5 years ago

Pressure and temperature measurement combined: the EPTTE3100

Posted 5 years ago

ELPM linear position sensor has improved sealing option

Posted 5 years ago

BEI's new Hall Effect rotary position sensor from Variohm

Posted 5 years ago

Ginetta Cars upgrade dynamometer rig with Variohm EGT sensors

Posted 5 years ago

Angle sensing for extreme environments: RSX-7900 rotary sensor

Posted 5 years ago

Improved sailing performance via DesignFlex-enabled Sip-and-Puff

Posted 5 years ago

Long-range absolute linear position sensors now with CANopen

Posted 5 years ago

BEI functional safety incremental encoders available at Variohm

Posted 5 years ago

Variohm stock Measurement Specialties Piezo Thin Film Sensors

Posted 5 years ago

DesignFlex pressure switches improve crop duster design

Posted 5 years ago

HM9J series: load cell for train, vehicle and weighbridge scales

Posted 5 years ago

High-precision single-/dual-axis inclinometer with options

Posted 5 years ago

Contelec's WAL200 position sensor for dosing systems

Posted 5 years ago

Vert-X 88 rotary encoder suits ultra-heavy-duty applications

Posted 5 years ago

Wachendorff revise and improve incremental encoder range

Posted 5 years ago

RSC-2800 and RSC-3200 sensors now have E1 European approval

Posted 5 years ago

Inclinometer suits harshest tilt measurement environments

Posted 5 years ago

Contactless angle sensor range with multi-turn capability

Posted 5 years ago

Non-contacting sensor for electro-hydraulic actuators

Posted 5 years ago

Custom designed temperature probes meet high quality standards

Posted 6 years ago

High-precision multiple section potentiometer for industrial use

Posted 6 years ago

Small, lightweight, gearless Multiturn Sensors

Posted 6 years ago

Hall Effect rotary position sensor for harsh environments

Posted 6 years ago

Multiple use of sensors: precision guided weed control equipment

Posted 6 years ago

Variohm announces new platinum thin film RTD sensor line

Posted 6 years ago

Industrial duty inclinometer measures single- or dual-axis tilt

Posted 6 years ago

Novotechnik RFC two-part sensor for the Big Bale Transtacker

Posted 6 years ago

NTC thermistor helps warm water-filled electric radiators

Posted 6 years ago

On-site food waste bio-digester uses Variohm level switch

Posted 6 years ago

Low-cost pressure sensor for OEM applications

Posted 6 years ago

CAN bus I/O node functionality added to CANopen absolute encoder

Posted 6 years ago

Super-flat non-contacting rotary sensor

Posted 6 years ago

All-terrain wheelchair power steering position feedback

Posted 6 years ago

VXP linear position sensor has extended environmental spec

Posted 6 years ago

VLPSC linear position sensors from Variohm

Posted 6 years ago

Non-contact linear position sensors offer benefits for exporters

Posted 7 years ago

Variohm EuroSensor adds high-performance pressure sensor range

Posted 7 years ago

Vert-X 16 encoder: precision for demanding applications

Posted 7 years ago

Miniature high-performance pressure sensor in 10 pressure ranges

Posted 7 years ago

BEI 9660 Hall Effect rotary position sensor now has more options

Posted 7 years ago

Precision angle measurement for joystick applications

Posted 7 years ago

Flexible non-contacting measurement of motor speed

Posted 7 years ago

Integrated 24-bit pressure/temperature PCB-mount sensors

Posted 7 years ago

Single-axis tilt alert switch for slope indication

Posted 7 years ago

Pressure transducers for railway applications

Posted 7 years ago

Gentech level and flow sensors now available from Variohm

Posted 7 years ago

Linear position sensor is based on sealed membrane potentiometer

Posted 7 years ago

Flexible ETP temperature sensors have range of options

Posted 7 years ago

How to set programmable angle encoders

Posted 7 years ago

Combined pressure/temperature sensor saves cost and space

Posted 7 years ago

Low-power angle sensors from Variohm EuroSensor

Posted 7 years ago

Angle sensors for vehicles

Posted 8 years ago

Hall Effect rotary position sensor has harsh environment options

Posted 8 years ago

Easier angle measurement in confined spaces

Posted 8 years ago

High-current pressure for critical filtration system

Posted 8 years ago

Level sensor with high corrosion resistance at competitive cost

Posted 8 years ago

New M7100 pressure transducer for challenging environments

Posted 8 years ago

A breath of air brings control to a hands-free fishing system

Posted 8 years ago

Dietz 103B vane-operated switch makes airflow detection simple

Posted 8 years ago

Pipe clamp probe for surface temperature measurement

Posted 8 years ago

New boiler probe has integrated connector

Posted 8 years ago

Robust rotary position sensor for fast paddle gearshift system

Posted 8 years ago

Single chip 24 bit digital temperature sensor for SMT assembly

Posted 8 years ago

Linear potentiometer position transducers sealed to P65 or IP67

Posted 8 years ago

Variohm Holdings launches new website

Posted 8 years ago

Cable extension sensors for BOXmover.eu transportation system

Posted 8 years ago

Slender Flex Sensor output varies with bend radius

Posted 8 years ago

New non-contacting, multi-turn, absolute rotary position sensors

Posted 8 years ago

Lifetime Warranty for accelerometers and accessories

Posted 8 years ago

Zemic BM24R series high-capacity load cells from Variohm

Posted 8 years ago

Inductive and magnetostrictive linear transducers explained

Posted 8 years ago

Rugged triaxial accelerometer suits rotating equipment

Posted 8 years ago

Novotechnik angle sensor used in wave power generator

Posted 8 years ago

2m cable extension transducer is sealed to IP50 or IP67

Posted 8 years ago

Miniature string pot sensors have measurement ranges up to 635mm

Posted 9 years ago

New UK and Ireland source for magnetic rotary encoders

Posted 9 years ago

Packaged compression load cell makes force sensing affordable

Posted 9 years ago

Low-cost pressure sensor is rugged and lightweight

Posted 9 years ago

Miniature altitude and barometric pressure modules

Posted 9 years ago

Novotechnik SP1600 and SP4000 angle sensors

Posted 9 years ago

Novotechnik NOVOPAD LS1 non-contact linear transducers

Posted 9 years ago

SMC series pressure sensors with CANopen interface

Posted 9 years ago

BEI Duncan 8360 series high-accuracy rotary position sensors

Posted 9 years ago

Novotechnik TX2 IP67 potentiometric linear position transducers

Posted 9 years ago

New source for high-performance temperature sensors

Posted 9 years ago

New combined pressure and temperature sensor

Posted 9 years ago

Variohm to distribute Prignitz pressure sensors and transmitters

Posted 9 years ago

Heavy-duty load cell is approved as legal-for-trade

Posted 9 years ago

Brochure highlights automotive sensor applications

Posted 9 years ago

Extended range of vacuum and pressure switches

Posted 9 years ago

New brochure: linear and angular position measurement

Posted 9 years ago

Celesco SP3 string pot sensor is low-cost, rugged and versatile

Posted 9 years ago

Hollow shaft potentiometric angle sensors for semi-submersible

Posted 10 years ago

Variohm EuroSensor website updated and relaunched

Posted 10 years ago

Low-cost draw wire sensors feature incremental encoder

Posted 10 years ago

CANopen absolute encoders use coded magnetic technology

Posted 10 years ago

Heavy-duty linear position sensors are sealed to IP67

Posted 10 years ago

Miniature draw wire sensor used in gearshift indicator system

Posted 10 years ago

Stainless steel single-point load cells are sealed to IP69K

Posted 10 years ago

Ruggedised cable extension sensor is sealed to IP67

Posted 10 years ago

Vibration sensors with industry-standard M12 connectors

Posted 10 years ago

Wachendorff extends warranty to 5 years for WDG encoders

Posted 10 years ago

Low-cost miniature laser distance sensor for dynamic measurement

Posted 10 years ago

Celesco PT9000 cable extension position sensors in UK

Posted 10 years ago

New MagnetoPot non-contact linear potentiometer

Posted 10 years ago

Omnicoder industrial encoder with programmable resolution

Posted 10 years ago

Ginetta race cars use Variohm pressure transducers

Posted 10 years ago

High-precision thermistors for low-temperature applications

Posted 10 years ago

Novotechnik SP5000 rotary position sensor for harsh environments

Posted 10 years ago

Advantages of non-contact magnetic rotary sensors

Posted 10 years ago

High-reliability temperature sensors used in breath tester

Posted 10 years ago

Angle sensor output is fully programmable

Posted 11 years ago

Low-cost cable extension sensor is user-configurable

Posted 11 years ago

New source for Wachendorff Automation absolute encoders

Posted 11 years ago

Angle sensor suits arduous high-duty-cycle applications

Posted 11 years ago

Laser triangulation sensor is adapted for motorsport

Posted 11 years ago

Free guide: 'BEI Industrial Encoders for Dummies'

Posted 12 years ago

Variohm to distribute ZEMIC load cells in the UK

Posted 12 years ago

Variohm offers 'the world's smallest stringpot sensor'

Posted 12 years ago

New website makes it easier to find specialist sensors

Posted 12 years ago

Bike with front swing arm uses sensors from Variohm

Posted 12 years ago

Cost-effective, high-performance, multiturn angle sensors

Posted 12 years ago

Rugged angle sensor has optional CANopen interface

Posted 12 years ago

IPX rotary potentiometers cope with extreme environments

Posted 12 years ago

Draw-wire sensor is half the size of alternatives

Posted 12 years ago

Linear sensors provide high reliability for movie motions

Posted 12 years ago

Variohm acquires Heason Technologies

Posted 13 years ago

Variohm to distribute BetaTherm temperature sensors

Posted 13 years ago

Variohm offers standard and customised sensors from Zemic

Posted 13 years ago

Variohm launches Vert-X exMag IP69K rotary sensors

Posted 13 years ago

String pots rated to IP68 for submersible applications

Posted 13 years ago

Novotechnik RFC4800 position sensor used in taxis

Posted 13 years ago

More applications
1 day ago
Automatic bearing lubrication brings ore inspiring results in mining
By installing automatic lubricators for bearings on its conveyor drive motors and belt pulleys, an opencast mine in Hungary has seen a range of benefits, including the prevention of unplanned downtime, longer bearing life and reduced repair work
1 day ago
Kinoulton company conveys COVID-combating masks
Here's a great example of the germ of an idea resulting in the combating of COVID
1 day ago
FLIR Systems announces four new Exx-Series handheld thermal imaging cameras
New E96, E86, E76 and E54 models feature enhanced thermal resolution and provide on-camera routing capability for more efficient inspections
2 days ago
New C-Mount lenses bring focus for machine and system builders
IDS now offers more than 20 new C-mount lenses with resolutions of 5, 8 and 10 MP as well as different focal lengths and optical classes
2 days ago
Backup DC motor for two rolling mill applications
Menzel Elektromotoren has built a replica of an old DC motor for a large German steel strip manufacturer
2 days ago
Distributed safety systems webinar 30th October 0930
In this webinar Pilz UK Product Manager David Collier will examine the state-of-the-art technology available to meet the demands of decentralisation
2 days ago
New narrow FeedThrough connectors save panel space
New from Cliff Electronics is the SLIMS FeedThrough Connector range, designed and manufactured in the UK
3 days ago
New autoglide 5 system from igus doesn’t need a guide trough
A new energy chain system for intralogistics and crane systems has been designed by motion plastics experts igus
3 days ago
New DC/AC converter unveiled by Phoenix Contact
With the arrival of its new DC/AC inverter (part of the Phoenix Contact Quint Power family) the company says that machine builders now have a compact solution to generate alternating current in DC applications
3 days ago
New-generation bullet train runs on NSK bearings
High-performance bearings from NSK are now operational in the newly developed N700S Shinkansen (bullet train)