Large Square Baler Applicators

2024 - Selection Guide
(Applicator Part Numbers)

Introducing the New 700 Series Automatic Applicator for Large Square balers! This automatic applicator  replaces the 600 series and will make adding preservative to your hay crop even easier and more efficient  than ever before!

Layout of the 700 Series Components

Key Design Improvements

- Single bypass pump supplying constant pressure to pulsating solenoid valves for improved response time to changes in moisture. This means no lag in preservative application while pump has to build up pressure

- Improved flowmeter that works on a range of products

- Display applicator readings on dedicated Virtual Terminal, Apple tablet, or Android tablet o Free Precision Baling App from Apple iTunes or Google Play store when using an approved tablet. Click here to see the control options and funtions


Same industry leading accuracy for the 700 Series Automatic Applicator

Using side-to-side moisture reading technology, the automatic applicator reads crop moisture across the width of the bale near the front of the chamber via moisture sensing dual star wheel  sensors for large square balers. The sensor will read crop moisture from 5% up to 70% for those  customers that make high moisture bales as well as dry bales.

Key New Features of the 700 Series Automatic Applicator

▪ Single pump means less maintenance ▪ More reliable baling rate generated from internal star wheel encoder
▪ New style flow meter with improved reliability ▪ Larger tips that prevent plugging at spray shield
▪ Lower up-front cost on complete applicator ▪ Superior sealing Deutch plugs throughout harnesses
▪ Optional Harvest Tec dedicated monitor ▪ Optional tablet monitor – use either Apple or Android approved devices
▪ Update applicator settings while in operation ▪ Reopen existing job record and add to it
▪ Dual solenoids allow for large range of baling rates covered with each tip, and shuts  product off to eliminate any dripping


Updates on the 700 Series System

Electronic Applicators (manual)

Operators that are interested in a more simplified system also have the option of an Electronic Applicators system for large square balers. Equipped with a high-capacity 115-gallon tank mounted on the rear of the baler, and a control box in the cab of the tractor. The operator is in complete control of the application adjustments

700 Series Automatic or Electronic

Comparison of Applicator Controls

Electronic Applicator 700 Series Automatic
Single Pump System X X
Control box with Adjustable Dial X
iPad Display X
Android Display X
ISOBUS Display X
Harvest Tec VT Display X
Automatic Application X
Moisture Sensing Capabilities X
Job Records X
Calculates Baling Rate X
Hay Indicator Compatible (Crop Eyes) X X
Dye Marker Compatible X
RFV Compatible X
Microwave Moisture Compatible X

Applicators for Round Balers

2024 - Selection Guide
(Applicator Part Numbers)

Hay preservative can be used to bale large round bales between 16% and 30% moisture. You have the option of a 25-gallon or, on certain models, a 55-gallon application system. The system mounts to the tongue of the baler and holds enough preservative to treat 30 to 60 tons of hay. Depending on your need, choose the new 300 series automatic system, a 700 series commercial automatic system, an electronic system, or an economical manual control system (available in 25-gallon only).

Moisture Sensors for Round Balers

Automatic systems for round balers are equipped with two


moisture sensing discs, one mounted on each of the baler side walls, sensing moisture across the width of the bale via conductivity. The sensors can accurately read crop moisture from 8% to 60%, covering a wide range of moisture levels.

Product Specskuhn_rb

All applicators come as complete kits designed to fit your specific baler, and consist of:

  • 25 or 55 gallon tank
  • 12 volt pumping system
  • All plumbing and wiring supplied
  • Your choice of control options

Click the link to see more info on the available control options or use the helpful chart below
Control Options for Round Balers




Comparison of Applicator Controls

Electronic Applicator 300 Series Automatic 700 Series Automatic
Single Pump System X X X
Control Box with Adjustable Dial X
iPad Display X X
ISOBUS Display X
Built-in Flowmeter X X
Automatic Application X X
Moisture Sensing Capability X X
Job Records by Field X X
Job Records by Individual Bales X
Calculates Baling Rate X X
Export Job Records to iPad X
Hay Indicator Compatible X X X
Stroke Counter on Small Square Baler X
Dye Sprayer Kit Compatible: Small Square Baler, Large Square Baler X

700 Series Automatic Control System

Large Square balers

The 700 Automatic Applicator control system is the premier applicator for large square balers. It accurately senses moisture on-the-go and adjusts the application of preservative every three seconds to match the condition of the hay.

This precision gives the operator the exact amount of product required to keep the crop in great condition, without wasting product. The all new 700 automatic system for large square balers can be controlled through the baler ISOBUS display, iPad or Android tablet. Giving complete control to the operator more efficiently as ever without the need for a separate monitor in the cab.
The display shows moisture content, speed of baling, and how much preservative is being applied. This control adjusts application rate every three seconds to attain the target rate.




The 700 Series can be controlled one of four ways:

-ISOBUS compatible, the applicator can be integrated and displayed through the baler monitor in the cab- no other display is needed.

-Through an ISOBUS tractor with a VT display and is not using it to control the baler, the applicator functions can be viewed through the tractor display.

-iPad controlled through the Precision Baling App

-Android controlled through the Precision Baling App

A simple push on the Main Menu key pulls up a selection of other screens including the adjustable settings and a Job Record screen. The system stores up to 300 job records by field, including date and time of baling, number of tons baled, product used and the average moisture and high moisture. The system will also store up to 33,000 individual bale records within those job records, and all of the job records can be exported to the iPad, or downloaded and printed via a USB port on the processor for easy and efficient access to crucial bale information.

The new Dye Sprayer Marking Kit that is found on large square balers can now be used on small square balers, allowing the operator to visibly mark the wet bales. GPS systems and bale scale kits can also be used with the 700 Series Automatic Applicator, helping the baling operation become more advanced and efficient than ever before.

Round Balers

The 700 Automatic Applicator is the choice of applicator for the round baler operator that makes hay commercially or is looking for the added performance and capabilities of the 700 system.

The 700 system on round balers reads moisture with two discs in the bale chamber up to 60% moisture, and also has a sensor on the bale door to record individual bale records. The system has the ability to store and download job and individual bale records via USB and export via iPad.

300 Series Automatic Control System

Round Balers


The 300 series automatic control system is a more compact and efficient applicator that accurately senses moisture on the go and adjusts the application of preservative to match the condition of the hay. This precision give the operator the exact amount of product required to keep their crop in great condition, without wasting product. The 300 Series applicator is controlled with an iPad* through a Bluetooth receiver, eliminating harnesses in the cab.

New improvements to the 300 Series Automatic Applicator include:

  • Single constant-pressure pump with pulsing solenoid that reacts quickly to changes in application rates
  • Improved flowmeter that works on a range of products
  • Smaller and more compact system that is easier to install and maintain

The applicator takes moisture and baling rate information from the two star wheel sensors on small square balers, and two moisture discs in the bale chamber on round balers, and the system will automatically apply the correct amount of product. The moisture, tonnage, and rates are all displayed on the screen, along with the volume used. A simple push of any Main Menu key pulls up a selection of other screens including adjustable settings and a Job Records screen. The system stores 63 jobs by date and time, number of tons baled, product used, and high and average moisture.

*iPad Mini or iPad 3rd Generation (2012) or newer, running the current iOS operating system or one previous version required for iPad option

Electronic Control Systems

Electronic Controls The electronic cab control is a solid state electronic pump control used for any large square, small square, or round baler. The control box can be mounted in the cab or on the fender, and once set the electronic control will hold the application rate constant and is adjusted by turning the dial on the control box.

Your hay is important. Make sure your preservative does what it says it will.

Find out more >>

Hay Indicator (Crop Eyes)

The hay indicator sensors see when hay enters the balers pick-up and activates the preservative application. When no crop is coming into the baler, the system will pause on its own, while being ready to apply when crop once again enters the baler.

Part# 474A - Pre-700 Series Automatic Applicator & Electronic Systems

Part #474C - 700 Series Automatic Applicator


Flow Meter

Part# 453

Digital Electronic Flow Meter is for use with any Harvest Tec preservative applicator
delivering between 40 and 500 pounds per hour. The flow meter reads the application rate in pounds per hour and total pounds used.

H2O Precision Moisture Sensor

The H2O Precision Moisture Sensor is a new moisture option for Small Square, Round and Large Square balers. Two discs  or star wheels mount in the bale chamber and read moisture with the patented side-to-side technology. Allowing accurate readings up to 60% moisture on the round and large square balers, and up to 33% on small squares. 

The H2O Precision Moisture Sensor is controlled with your Apple or Android smart phone or tablet via a hardwired connection and free app.

Part# 201RB - Round Balers

Part# 201SS - Small Square Balers

Part# 201LS - Large Square Balers


Transfer Pumps

To transfer Baler’s Choice Hay Preservative safely and easily from your storage container to your applicator tank, use any of the following transfer pumps:

Model 9214: For a rapid transfer rate of 14 gallons per minute, this 12-volt unit can get the job done quickly.

Model 9212: This standard output, 12-volt model, will transfer preservative at a rate of 4 gallons per minute.

Model 9213: This inexpensive hand transfer pump is ideal for transferring small amounts of preservative easily.


Dye Sprayer Marking System

The Dye Sprayer Marking System is a simple way to visibly mark the wet areas on your large square bales. Compatible with the 600 & 700 Series Automatic Applicator or  moisture only system for any large square baler. The 3-gallon system is mounted near the bale chamber and when the adjustable high moisture alarm sounds, the system will spray a red-colored, food-grade dye on the exact location on the bale for a quick and easy reference.

Part# 030-0840 - 600 Series

Part# 030-0740DM - 700 Series


GPS Interface Kit

By incorporating the GPS into the Model 600 or 700 system the producer has the ability to create yield maps for their crops, allowing them to gain the knowledge needed to maximize productivity. The kit consists of a removable data storage card and GPS interface harness that is compatible with the Trimble 162 AgGPS, which is purchased separately from a Trimble dealer.

Part# 030-0780GPS - 700 Series

Part# 030-0880GPS - 600 Series

Automatic Applicator kits DO NOT include display

Made for iPad® running the current iOS operating system
or one version previous is required for iPad operation
*iPad is a trademark of Apple Inc., registered in the U.S. and other countries.

*Contact Your Local Kuhn Dealer For Pricing*


Baler Model 700 Series Automatic Part # Electronic Part # Manual Part # Upgrade Electronic System to Automatic System Part#
LSB 870, 890, 890D 7964510C 4914510 N/A 7654510C
LSB 1270, 1290, 1290D 7964511C 4914511 N/A 7654511C
LSB 890, 890D, 1270, 1290, 1290D
w/Omni-Cut or Opti-Feed
7964525C 4914525 N/A 7654525C


Baler Model 300 Series Automatic Electronic Upgrade to 300 Automatic System
VB2100 Series Balers 337 436 3U7
VB3100 Series TBD TBD TBD
VB7100 Series TBD TBD TBD


Baler Style Upgrade to Auto Applicator
Round Baler 030-201RB (H2O Kit) N/A
030-300RB Contact Harvest Tec
Large Square 030-201LS N/A
030-0700 Contact Harvest Tec


Description Part Number
400 Series iPad Conversion Kit (Bluetooth receiver) 030-4672B
600 Series iPad Conversion Kit (Hardwired receiver) 030-6672C
iPad Mini Mounting Kit 030-2012MK
iPad Mini & Mounting Kit Combo (iPad Mini, mount, charger) 030-4670DK
Harvest Tec Display Kit *700 Series Only 030-7670DK
Baler Mounted Moisture Tester 008-FX2000
Hay Indicators (Crop-Eyes) 030-474A
Hay Indicators (Crop-Eyes) *700 Series Only 030-474C
Dye Marking System *700 Series only 030-0740
Dye Marking System 030-0840
H2O Precision Moisture Kit Dye Marker
700 Series GPS 030-0780GPS
12V Electronic Transfer Pump (4 Gal/Min) 008-9212
12V Electronic Transfer Pump (15 Gal/Min) 008-9214
110V Electronic Transfer Pump (4 Gal/Min) 008-9215