AGRICULTURAL TRAILERS
Precision loads, maximum yields.
AT A GLANCE
British-built overload protection for farm trailers.
1, 2 or 3 Axle
Single, twin and tri-axle trailers
±5%
Accuracy at 90-100% of GTW
iOS & Android
Mobile app for live load monitoring
DIY or Fitted
Self-install guide or UK engineer
- Grain trailers
- Silage trailers
- Livestock trailers
- Root crop / potato
- Chaser bins
- Dump trailers
- Tandem-axle
- Tri-axle
OVERVIEW
Built for farmers who can't afford to get their trailer load wrong.
A complete on-board overload protection system for your farm trailer, single, twin or tri-axle. Live axle and gross weight in the cab as you load, so every run hits the legal limit without crossing it.
Non-legal-for-trade. Designed as a trailer axle overload monitor with ±5% accuracy across the full trailer weight range, calibrated to your trailer for legal road weights and accurate yield records.
±5% is a guide figure across the full weight range of the vehicle trailer. The system is most accurate at 90–100% GTW, at lower weights it is less precise. It is designed and marketed at ±5% as an honest figure that covers the whole range.
- Overload alert at 90–100% GTW, where the system is at its most accurate
- ±5% accuracy guide figure across the full trailer weight range
- Maximise every legal trailer load, stop loading at the right point
- Live axle and gross weight, in the cab and on your phone
- Built for the farming environment, dust, mud, vibration, all weathers
TYPICAL APPLICATIONS
Wherever a farm trailer earns its keep.
- Grain, cereal and combinable crop haulage
- Silage and forage handling at clamp
- Root crop work for potatoes, sugar beet and brassicas
- Livestock feed and bedding distribution
- Muck spreader and slurry tanker filling
- Estate, contractor and mixed-load farm work
TECHNICAL SPECIFICATIONS
Agricultural specs
Built for tandem and tri-axle trailers in UK grain, silage, livestock and root crop operations.
| Trailer types | Grain, silage, livestock, root, bulk |
| Axle configurations | Tandem and tri-axle |
| Accuracy | ±5% at 90-100% GTW |
| Sensor type | stainless steel bolt-on extensometer |
| Ingress protection | IP68 |
| Suspension support | Mechanical, air, mixed |
| Display | In-tractor-cab + Bluetooth app (local, not cloud) |
| App compatibility | Android 8.0+ / iOS 13.0+ |
| Install time | ½ day per trailer |
| Calibration | On-site weigh pads, loaded vehicle required |
| Manufactured | Norwich, UK – Bowmonk Ltd |
Made for mud, harvest, and every season.
Trailer chassis don’t flex much and that’s exactly where the XT50 comes into its own. Designed for structures with very low elastic deformation, it reads the load accurately where standard sensors can’t get a signal. Bolt straight onto the chassis and it starts giving you real weight data immediately. Whether you’re running grain, silage, or root crops, you’ll know what’s on before you hit the road.
- Fully welded stainless steel - survives harvest season, wash-down, and everything in between
- Bolt-on chassis fitment - clean, straightforward installation with no damage to the trailer
- Ultra-low activation force - built for stiff trailer frames that standard sensors struggle to read
- Real-time load output - know your weight before you leave the field
- Works across trailer types - grain, silage, root crop, tipper and more
- Overload protection built in - stay legal, protect the trailer, protect the axles
WHAT IS INCLUDED
Every component you need, in one kit.
Supplied as a complete installation pack, with everything required to fit and calibrate the system on a single farm trailer.
In-cab display
Compact dash or A-pillar mounted readout showing live gross and axle weight.
Load sensors
Robust pressure sensors built to withstand harsh agricultural use - mud, dust and the season-after-season punishment of farm work.
Wiring loom
Pre-terminated harness for clean, fault-free installation to vehicle 12V/24V supply.
Install & calibration guide
Step-by-step printed and digital guide for self-install and on-vehicle calibration.
Bluetooth mobile app
Driver's iOS or Android app, mirroring the in-cab display over Bluetooth at typical range of around 10 metres - no SIM, no cloud, no monthly fee.
Mobile app for iOS and Android included as a free download. UK installation by our own engineers available nationwide.
We come to your farm.
Most trailers are worth more in the field than sat at a fitter’s. Our engineers come to you – the van is off the road for 1 working day, fitted and calibrated before your driver’s tea break.
- Engineer comes to your yard or site
- Calibrated on-site using our weigh pads - loaded vehicle required
- Driver walked through the in-cab display and the app
- Self-fit option with full printed and digital guide also available
HARVEST-READY
Fit it in the quiet season.
Most agri fits go in between December and June. We come to the farm, fit the system on each trailer, and calibrate on-site using our weigh pads. Come harvest, you are already set up and legal.
- Off-season install to avoid harvest pressure
- On-farm fitting - engineer comes to you
- Full on-site calibration using our weigh pads
- Multi-trailer discounts
THE SMARTWEIGH ADVANTAGE
Why operators choose SmartWeigh.
Driver's mobile app
Free iOS and Android app for the driver, mirroring the in-cab display on their phone. Pairs to the in-cab unit over Bluetooth at typical range of around 10 metres – no SIM, no monthly fee.
Flexible installation
DIY with the printed and digital guide, or have a SmartWeigh engineer come to your farm - whichever suits the timetable.
Built to keep working
Solid-state, billet aluminium sensors with no moving parts. Sealed to IP67, jet-wash ready, and ready for everything from fieldwork to feedlots.
READY TO GO?
Talk to our overload protection specialist.
Send a few details and one of our team will come back with pricing, a fitting slot and a straight answer to any compliance question.
Get a price
The more you tell us, the more useful our reply will be.
By sending this enquiry you agree to our privacy policy. We will only use your details to answer your enquiry – never shared.
REAL CAUSES BEHIND VEHICLE INSPECTION FAILS
Struggling to drive in a straight line usually means one thing 🚨⚖️
Well above the 3.5t limit on the A1 at #GRANTHAM.
Load removed and driver reported.
👉
#SmartWeigh #DVSA #Overloaded #RoadSafety
#RPU Conducting vehicle checks on the A1 #GRANTHAM stopped this recovery vehicle struggling to drive in a straight line. Any guess on the weight?
It’s safe to say it was above its 3500kg gross weight limit. #OPTRAMLINE
Load removed, driver reported for the offence.
Less Rocky, more overload catastrophe 🚨
❌ 2,880kg overweight
❌ 98% over on rear axle
❌ Cord exposed tyre
Seized and prohibited.
⚖️ SmartWeigh helps fleets know their weight before DVSA does.
👉
#SmartWeigh #DVSA #Overloaded #RoadSafety
#RPU love a montage; however, this is less Rocky, more Dumb & Dumber.
2,880 kg overweight on gross; tyre with cord exposed; no side repeater; 98% over on rear axle. Prohibition issued and seized for no tax.
A true debacle. Driver reported for summons to court. #PG9 #DVSA
Wawaweewaa 👀
3.5t limit.
6,260kg reality.
94% overweight on the rear axle 🚨
⚖️ SmartWeigh helps stop overloads before the springs give up.
👉
#SmartWeigh #DVSA #Overloaded #RoadSafety
"Wawaweewaa!" #RPU Stopped this ‘very nice’ 3500kg (GW) van in #BOSTON. Weighed in at a whopping 6260kg 👀
94% overweight on the rear axle alone.
Sad springs = bad things. Another disaster awaiting to happen,averted by proactive, robust targeted patrols. #DVSA #LincsSpecials
Over half a tonne overweight on a 3.5t vehicle 🚨
Add defective brakes, a damaged windscreen and no seatbelt… what could possibly go wrong indeed.
⚖️ SmartWeigh Onboard Weighing Systems help operators prevent dangerous overloads before they reach the roadside.
#RPU stopped this vehicle on the A1 near Grantham. Over 1/2 tonne over its plated weight of 3500kgs, defective brakes, damaged windscreen and driver not wearing a seatbelt. What could possibly go wrong. Driver reported for summons and vehicle prohibited.