Description
When you’re spraying herbicide or liquid fertilizer, knowing that every boom section is flowing properly can save you from costly skips, overlaps, or chemical waste. This flow monitor kit gives you a quick visual check on four separate spray lines, so you’ll know instantly if a nozzle plugs up or a line breaks while you’re making passes across the field.
What You’re Getting
- Four complete flow indicator columns that mount right in your boom plumbing
- Multiple ball options—plastic green and red balls for lighter flows, glass red balls for mid-range, and stainless steel balls for heavier applications
- 3/8 inch hose barb elbow fittings paired with 3/4 inch inlet connections to handle various flow rates and pressures
- Modular design lets you monitor individual boom sections or spray lines independently
- Clear columns so you can see the ball movement from the cab or while walking the sprayer
Built for Real Farm Work
This kit works with Wilger’s modular flow monitoring system that’s found on boom sprayers ranging from small pull-behind units to self-propelled machines. Whether you’re applying pre-emergence herbicide in the spring, post-emergence treatments during the growing season, or liquid fertilizer at sidedress, these monitors help you maintain consistent application rates across your entire boom width.
Made to Last
The columns are built to handle the vibration and chemical exposure that comes with field spraying. The different ball materials give you flexibility to match your specific flow rates and chemical viscosity—lighter plastic balls respond to lower flows while the stainless steel balls work better with thicker products or higher pressures that might not move the lighter options.
Installation Notes
These monitors plumb right into your boom supply lines using standard hose connections. Mount them where you can easily see the ball movement from your normal operating position. If a ball stops moving during operation, you’ll know immediately which section has a problem, saving you from having to walk the entire boom looking for plugged tips.


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