Redball ® Spray Monitor


$68.99 EA

The Redball ® spray monitor is a useful flow indicator during the application of liquid chemicals and fertilizers. The spray monitor does not regulate the flow of the liquid but it is an extra set of eyes to instantly see if your fertilizer or herbicides are flowing properly. The Redball ® spray monitor is constructed of clear poly with four monitoring chambers on a manifold. The monitor has a 3/4 inch swivel hose barb that will work with a 3/8 inch hose.

Availability: In Stock -

The Redball ® spray monitor will help prevent the misapplication of important herbicides, pesticides and fertilizers. With one look, you can visually monitor if you are keeping application rates even among rows. The spray monitor is constructed of clear poly with 4 flow chambers on a manifold.

This easy to install monitor works by using brightly colored balls in each column to indicate application rates. If all of the balls are in a straight line, you have even flow rates. If a ball is lower, you can inspect that line for a plug or worn nozzle. If a ball is higher, you may have a damaged hose or leaky connections.

Because each fluid varies in density and viscosity, the Redball ® spray monitor comes with five different sets of interchangeable balls for monitoring different flow rates. A flow rate table is included.

The spray monitor comes with two blanks that can replace the 90 degree swivel hose barbs. The 3/8" hose barbs can be used with a 3/8" hose.


  • Four column unit
  • 4 Red glass balls
  • 4 Red plastic balls
  • 4 Green plastic balls
  • 4 Steel balls
  • 4 Black plastic balls
  • 5 Nuts and 6 gaskets
  • 2 Blank Disks
  • 4 90° 3/8 inch hose barbs

Use ASC # 36481 for 3/8" elbow replacements, ASC # 36482 for 1/2" elbow connections, ASC # 36483 replacement Viton® washers and ASC # 36480 for replacement nuts.


Shipping Information

Your order is important to us and we will strive to process it as quickly as possible. Most in-stock items are shipped within 2-4 business days and typically deliver in 5-7 business days. In-stock items may ship from multiple locations and can arrive on separate days. Heavy or bulky items will ship via Freight/Truck Service and will take 8-10 business days for delivery. For those immediate product needs, we do offer at an additional cost, express service from UPS and Motor freight.

Shipping costs are determined by item weight and your zipcode. Once you have entered your shipping address, city, state, and zip code into checkout, your shipping total will be calculated and available for review. Please see the shipping map below as a guide.

Return Information

Your satisfaction is our priority. If for any reason you are not satisfied with a purchase from Agri Supply, we will gladly refund your money, or exchange the item, or fix it should it break. A minimum one-year warranty applies to all non-perishable items, parts and service from Agri Supply, and all hand tools sold by Agri Supply have a lifetime warranty, regardless of the length of the manufacturer's warranty. See our Agri Supply Guarantee for more details.

To return an item... give us a call at 1-800-345-0169, or visit one of our 8 retail stores near you, and one of our friendly customer service representatives, or store employees, will be glad to assist you.

If you have any questions please contact our Customer Service representatives at 1-800-345-0169

Standard UPS Ground Shipping Map -
UPS Ground
The above shipping chart applies to UPS ground shipments to the 48 contiguous states only. Please call 1-800-345-0169 for timing on shipments to Alaska, Hawaii, and Puerto Rico, thank you!

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