Bring Precision Farming to Your Older Combines

Your combine runs fine. It just needs a brain upgrade. Install Green Growth's retrofit yield monitor and start mapping your yield today.

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Why Retrofit?

New combines cost €300,000+. A retrofit kit costs a fraction of that. If your harvester's mechanicals are sound, there's no need to replace it just to get data.

Our system operates independently of the combine's electronics. We don't need a CANBUS connection to measure yield.

Independent System: Has its own GPS and 4G connection.
Universal Fit: Fits any elevator with a rectangular housing.
Retrofit Installation Diagram

What It Costs & What's Included

A Green Growth retrofit yield monitor is a one-time hardware purchase plus a small annual cloud fee covering telemetry upkeep, data storage and the web dashboards. Together it costs a small fraction of the €300,000+ price of a new combine, and because it uses the phone or tablet you already own as the display, there's no proprietary cab screen to buy.

In the kit

  • Optical grain-flow sensor
  • Processing unit with built-in GPS + 4G
  • Wiring harness and mounting hardware
  • Free iOS / Android cab app (live yield map)

Specs at a glance

  • Install: ~2 hours, DIY, common tools
  • Calibration: remote, no load-wagon runs
  • Fits combines: ~1995 to current, any brand
  • Exports: Shapefile (.shp) & ISOXML

No ongoing lock-in

  • You own your yield data outright
  • No CANBUS or dealer visit needed
  • Works independently of the combine's electronics
  • Moves to your next machine — no re-buy

Request a Quote for Your Combine

Supported Models (Examples)

We have successfully retrofitted hundreds of machines. Common models include:

How It Works

1. Optical Sensor

Installed on the clean grain elevator. It measures the volume of grain passing by using light, not impact. This means less wear and minimal calibration drift.

2. Cloud Processing

Data is sent instantly to the cloud. We combine volume data with GPS speed and position to calculate precise yield per hectare.

3. Live Mapping

You see the map building in real-time on the mobile app. Spot low-yielding areas instantly while you harvest.

Don't harvest blind this season.

Upgrade your combine now and get the data you need to improve next year's crop.

Request Retrofit Quote

Frequently Asked Questions

Is my old combine supported?

Yes. If your combine has a clean grain elevator, we can install our sensors. We support models from the 1990s and 2000s including John Deere 2200/9000 series, CLAAS Dominator, Mega, and early Lexions.

How hard is the installation?

Installation typically takes about 2 hours. It requires drilling a small hole in the elevator housing for the sensor and routing power to the cab. No complex hydraulic or CANBUS integration is needed for the basic kit.

How much does a retrofit yield monitor cost?

A Green Growth retrofit yield monitor is a one-time hardware purchase plus a small annual cloud fee that covers telemetry upkeep, data storage and the web dashboards — together still a small fraction of the €300,000+ price of a new combine. Because it reuses your existing harvester and your own phone or tablet as the display, there is no proprietary cab screen to buy. Hardware pricing depends on crop type and kit configuration; request a quote for your specific machine.