Seed Blockage Sensor

DS4000i optomodules are made for seedflow monitoring on drills. Seeds do not need to be filled up in the hose reaching seed sensors. Thanks to the easy and precise seed-flow calibration, blockages are detected immediately or soon.




Excellent Oilrape Seed Detection

Optomodules contain photosensors equipped with 4 infra lights and detect even the smallest seeds like oilrape seed.

Our Sensors are Farmer’s Friendly

We are designed our sensors that those ensure the maximum comfort for the farmers.

Long Work Without Cleaning – Each Digitroll seed sensor is armored with DUST DETECTION & COMPENSATION (DDC) feature resulting long days and hours spent without sensor cleaning in the hassle of short seeding season. Increasingly stronger infra light is applied when infra surface becomes dusty or seed coating covered. Reaching a level, a ‘dusty seed sensor’ symbol appears on monitor screen following a push of the TEST button. This solution is a Patented Technology by Digitroll.

Sensor Features

  • Seed flow/blockage detection
  • Linear connection of sensors up to 128 rows
  • Calibration of expected seed density
  • Available for air hoses with 30 or 32 mm diameter
  • Particle detection with 4 infras
  • Quick sensor cleaning by opening sensor by hand without tool

Seed-flow calibration has never been easier. Just one touch of a button and expected seed-flow with low rate alarm is on the right level. At any seed, at any speed. Slowly developing processes like lowering seed rates due to lowering seed level in hopper can also be observed, not only blockages.

• Sensor Type: Photocell
• Standard Sensing Objects: seeds (eg.: wheat, barley, oil rape, peas, beans etc.)
• Minimum Detectable Object size*: 1-2 mm
• Maximum Speed of Detectable Objects: cca.25m/s
• Optical Detection Elements: 4-pair
• Detection proccess: Digital Signal Procession
• DDC – Dust Detection & Compensation**
• Cleaning Alarm: Automatic – send alerts if the sensor optics surface dust is too high**

  • Seed Master Integra
  • Calibra Flow

*The minimum detectable object or particle size is depends on the objects or particles speed and the sensors optical elements dust status.
**Sensor cleaning is rarely due, thanks to Dust Detection & Compensation (DDC) function, so the operator can seed large areas without cleaning the sensors, allowing him to get the most out of the short seeding time at optimum conditions. The cleaning alarm is an unmatched solution to determine sensor dust level, then Dust Compensation, relying on dust test information, automatically compensate the sensibility. High sensitivity of blockage detection will be maintained by this solution. This solution is a Patented Technology by Digitroll.

The DS4000i sensors are official accessories of Vaderstad air drills. More information at

Typical Applications & Benefits

• Combi air drills, where both seeds and fertilizers are applied at different rates
• Air drills having 64 + seeding rows