Wilger Electronic Flow Monitoring System

Example Screen of the Electronic Flow Monitoring System App (v2.6) monitoring three different products being applied simultaneously on the same piece of equipment
Example Screen of the Electronic Flow Monitoring System App (v2.6) monitoring three different products being applied simultaneously on the same piece of equipment

Wilger’s Electronic Flow Monitoring System and Electronic Flowmeter are built from the ground up for consistency and dependability on the farm.

With an easily serviceable flowmeter and simple flow monitoring system app, it allows custom threshold monitoring for blockage and any rate irregularity.

The flowmeter becomes necessity with the importance of a consistent fertilizer or chemical application, which are plagued by blocked lines, incorrect orifices, blown product hoses, micro-dosing, and chemicals that are too dark to visually monitor. (E.g. humic acid (coffee black), Paralign™ Fertilizer (blood red), Copper mixes, etc.)

The system goes far beyond what a visual flow indicator system can provide, giving the actual flow row-by-row, instead of relying on pressure gauges, visual flow indicators or a single system flowmeter.

The EFM system can simply be retro-fitted to existing visual flow indicator assemblies, simply being added in-line with the common O-ring Seal (ORS) connections.

Example EFM System Costing

As there are many ways to configure an electronic flow monitoring system, for base pricing (without outlet fittings). Note the package cost does get less expensive with larger configurations, as it already includes the base-package’s ECU cost.

16 Channel/Outlet Kit: $238 CDN MSRP/Row


ECU KIT (Main ECU, battery harness, antenna, and harness terminator), 16CH Node Kit (16CH Node Harness & Node, and sensors), 4x 4-Outlet Manifolds (Plumbing Manifolds, 16 flow meters, 16 check valves)

32 Channel/Outlet Kit: $180 CDN MSRP/Row

48 Channel/Outlet Kit: $162 CDN MSRP/Row

64 Channel/Outlet Kit: $152 CDN MSRP/Row

80 Channel/Outlet Kit: $146 CDN MSRP/Row

Example for Dual Shank/Product Monitoring. As the same system can monitor up to 2-3 different products or flow rates, the amount of rows used in a dual shank/product application would simply be added up to make a single system.

(48 Row Dual) 96 Channel/Outlet Kit: $142 CDN MSRP/Row

(72 Row Dual) 144 Channel/Outlet Kit: $136 CDN MSRP/Row

Often there are questions of which is the best EFM jet to use, or users simply need to verify they are using a proper metering orifice for their required rate. Below are a few calculators/spreadsheets that should help. Tip Wizard now has a calculator designated for the selection of an EFM jet, as well as a ‘Fertilizer Wizard’ that allows a user to select an ORS metering orifice for their system requirements as well.

Max Operating Pressure 100 PSI (7BAR)
Max Operating Flow Rate Up to 1.5 us gpm (for standard flow bodies)
Max Operating Temperature 185°F / 85°C
O-ring Seal Materials FKM or VITON®
U-clip Material Stainless Steel
ORS Fitting Material Glass-reinforced Polypropylene
Flow Meter Body Material TPX (Polymethylpentene) .

TPX Compatibility – plastic compatibility guide is not developed by Wilger, and cannot be guaranteed for accuracy

Electronic Flowmeters

Electronic Flow Meter for Row-by-Row Flow Monitoring on an air drill, corn planter or seeder.

Wilger’s Row-By-Row Flowmeters

The compact flow meter is different than your traditional flow meter in a lot of ways.


With the TPX polymer body, you get a non-stick surface, excellent chemical resistance, and a clear body that you can use to visually check that the paddle wheel is spinning for any troubleshooting.


The flowmeters are made and designed by Wilger, ensuring every piece can be serviced and replaced; whereas often flowmeters are virtually impossible or impractical to service or even replace.

The only designed part that should wear out and effect accuracy should be the paddle wheel, which can simply be replaced in seconds.

Patent-Pending Stabilizing Jets:

The flowmeters have 4 different sizes of stabilizing jets that maintain better accuracy over the operating flow range of the flow meter. The operational ranges below optimize the jet to the application for peak accuracy; however, as long as the jet doesn’t restrict the orifice flow, it can still be as a flow indicator (reduced accuracy).

Green Jet: 0.04 – 0.12 us gpm flow range
Red Jet: 0.10 – 0.31 us gpm flow range
Blue Jet: 0.18 – 0.98 us gpm flow range
Black Jet: 0.57 – 1.53 us gpm flow range

 The EFM makes monitoring dark liquids (or in the dark) a cinch

Flow Indicator with Humic Acid. Notice the flow indicator ball can be very difficult to see.

Visual ball flow indicator trying to show humic acid can become a difficult problem when visibility is poor.

As field sizes get larger, with the same amount of hours in the day, it is not uncommon to be planting in the dark. Coupled with a lot of applied products actually being dark liquids, even in the daytime, you can be planting in the dark.

As the flow monitoring system performs well with any liquids, colored or not, it becomes a truly valuable tool to have in the cab when you are planting with very little trustworthy feedback on how your liquid is applied (until it is too late). Simply plug in the EFM and harnesses, set the app up as you’d like it with custom threshold alarms, and continue on with your work.

Planting in the dark with visual ball flow indicators with a dark liquid can be difficult to see

Visual ball flow indicator trying to show a red starter fertilizer (Paralign™ ) can be a challenge, even with white colored balls, in less than ideal conditions.

EFM System Harnessing & Electronics

System Harnessing & Electronics

Since the flow meter’s output is a raw pulse frequency, it is compatible with almost any of today’s application technology configurations (ISOBUS, etc.). It only requires the front-end and application to pull in and display the information.

As such, we are continuing work with OEM system manufacturers and welcoming other system manufacturers to pull the EFM sensor feedback into their existing monitors and systems to be able to provide more value to their users.

We offer our current standard/retrofit options, using Agtron’s electronics and controllers, which are highly regarded for their use in seed-blockage monitors. The same quality of electronics is available immediately for use to build an EFM system.

Electronic Flow Monitoring System Example Assembly. Given the system is modular, they can make systems from anywhere from 1-196 (or more) flow outlets.

O-ring Seal (ORS) Metering and Plumbing Components

ORS Metering Orifices

ORS metering orifices with ISO Color coding for flow rate

O-ring seal metering orifices are accurate and large enough to make them easy to handle, so switching rates is easy.

Custom hole-size orifices and ISO-color coded orifices are available to match any rate required.

ORS Check Valves

#20551-00 ORS to ORS Check Valve Body for ORS Manifolds and Flow Indicators

A variety of check valve options are available to act as a drip-check, but also keep stable back-pressure on the flow meter itself.

360° Range of Motion

#20574-00 4 outlet O-Ring Seal manifold

All O-ring sealed fittings can be spun 360° without fear of leaking of pulling out.

This makes installation easy as the fittings pivot to where you need them to point.

Chemical Resistance

Electronic Flow Meter for Row-by-Row Flow Monitoring on an air drill, corn planter or seeder.

Find the below plastic compatibility chart, which compares TPX to other commonly used clear plastics like PVC.
TPX outperforms all other clear polymers in chemical resistance, cold/hot temperature rating, and more.

TPX & Other Plastic Compatibility

Related News or Videos

As a pro-tip for assembling a flow indicator system, using a small amount of lubricant, such as liquid silicone on the o-ring when fitting any ORS components together makes it a breeze.

The clear plastic used to make all Wilger flow meter bodies is very special. It provides the greatest amount of chemical resistance, while maintaining the best clarity at the same time.

Over time, as with all plastic, it deteriorates in long term exposure to UV (such as the sun). To combat this and to extend the life of the flow indicator columns, Wilger uses a UV inhibitor, but to further extend the clarity of the plastic flow indicator columns, it is best to cover them up whenever in use.

Having a flow meter bodies covered from UV will significantly increase the lifespan and clarity of the plastic.

Contact Wilger

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