Large Square Baler

claas_largeThe 600 Series Automatic Applicator system is now compatible with an iPad as the display, and still retains all its functions such as sensing moisture and tonnage on the go, and adjusts the preservative application rate based on the condition of the hay. This precision gives the operator the exact amount of preservative required to keep the crop in great condition without wasting product. The display in the cab gives the operator complete control and provides information on:

  • Moisture content
  • Speed of baling (tonnage)
  • Volume of preservative used per bale
  • Total tons baled

The 600 Series Automatic Applicator is compatible with the new Bale Identification System, or Tagger, that attaches a tag carrying all the information on that specific bale to the bale itself.

Electronic control systems are also available for large square balers. Equipped with a high-capacity 110-gallon tank mounted on the rear of the baler, the operator can go almost non-stop.

Moisture Sensors for Large Square Balers

Automatic systems for large square balers are equipped with two star wheel moisture sensors mounted on the top of the bale chute, sensing moisture across the width of the bale via conductivity. The sensors can accurately read crop moisture from 8% to 70%, covering a wide range of moisture levels. As the star wheels turn, they also calculate tonnage, helping the system apply preservative even more accurately

Product Specs

Comparison of Applicator Controls
 Electronic Applicator600 Series Automatic
Single Pump SystemX 
3-Pump Manifold X
Control Box with Adjustable DialX 
iPad Display X
IOSBUS Display X
Built-in Flowmeter X
Automatic Application X
Moisture Sensing Capability X
Job Records by Field X
Job Records by Individual Bales X
Calculates Baling Rate X
Export Job Records to iPad X
Hay Indicator CompatibleXX
Dye Sprayer Kit Compatible X
Tagger Compatible X

Round Balers

claas_roundHay 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 600 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 Specs

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

Control Options for Round Balers

Comparison of Applicator Controls

 Electronic Applicator300 Series Automatic600 Series Automatic
Single Pump SystemXX 
3-Pump Manifold  X
Control Box with Adjustable DialX  
iPad Display XX
IOSBUS Display  X
Built-in Flowmeter XX
Automatic Application XX
Moisture Sensing Capability XX
Job Records by Field XX
Job Records by Individual Bales  X
Calculates Baling Rate: Round Baler  X
Calculates Baling Rate: Small Square Baler, Large Square Baler XX
Export Job Records to iPad  X
Hay Indicator CompatibleXXX
Stroke Counter on Small Square Baler  X
Dye Sprayer Kit Compatible: Small Square Baler, Large Square Baler  X
Tagger Compatible: Large Square Baler  X


600 Series Automatic Control System

Large Square Balers

The 600 Automatic Applicator control system is the premier applicator for large square balers. The 600 system 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 600 automatic system for large square balers is controlled through an iPad or iPad Mini via Bluetooth, giving complete control to the operator more efficiently as ever with a colorful, wireless display 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.

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.

Round and Small Square Balers

The 600 Automatic Applicator is the choice of applicator for the round or small square operator that makes hay commercially or is looking for the added performance and capabilities of the 600 system. On small square balers, the 600 system reads the moisture and tonnage with two star wheel sensors, and also has a stroke counter that records the number of strokes per bale, and an end of bale sensor, to record individual bale information like the large square system does. 

The 600 system on round balers reads moisture with two discs in the bale chamber up to 70% moisture, and also has a sensor on the bale door to record individual bale records. Both systems have the ability to store and download job and individual bale records via USB and export via iPad.

300 Series Automatic Control System

Round and Small Square Balers

HTThe 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, with iOS 8 or higher operating system required for iPad option

Electronic Control Systems

electric_controlsThe electronic cab control is a solid state electronic pump control used for large round and large square balers. The control is mounted in the cab or on the fender. Application rate is quickly and easily adjusted from the operator s seat. Once set, the electronic control will hold the application rate constant. This unit is included with all 25-and 55-gallon applicators with electronic control. It is also included with 100-gallon applicators with electronic control for large square balers.

Manual Control System

 The manual pressure regulator provides full-rate adjustment at the applicator, which is controlled on the baler. This economical control is available for 25-gallon applicators only. *There is no regulation control in the cab of the tractor with this unit.

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

Find out more >>


Crop Sensing Eye Kit

Part # 474A The hay indicator senses hay on the balers pick-up automatically, starting and stopping the application. Part # 474A Hay Indicator Kit for use with 464 Automatic Control, 2005 & newer Automatic & Electronic Controls

Flow Meter

Part# 453 Digital Electronic Flow Meter 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.

Transfer Pumps

Part# 9214, 9212, 9213To 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.

Floor-Mounted Applicator Pause Switch

Part# 475 The floor-mounted applicator pause switch is an inexpensive addition to your application system the enables the operator to easily stop and start the applicator. For use with any automatic application system, 2005 and newer.

Dye Sprayer Marking System

Part # 030-0840 The Dye Sprayer Marking System is a simple way to visibly mark the wet areas on your large square bales. Compatible with the Model 696 Automatic Applicator or the Model 600 Moisture Monitor 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.

GPS Interface Kit

Part # 030-0880 By incorporating the GPS into the Model 600 Moisture Monitor, 696 Automatic Applicator, or Bale ID Tagger, 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 removeable data storage card and GPS interface harness that is compatitble with the Trimble 162 AgGPS, which is purchased separately from a Trimble dealer.

600 and 300 Series Applicator Kits DO NOT Include Display

600 and 300 Series Applicator kits now include a Bluetooth receiver for iPad operation.
(iPad Mini or iPad 3rd Generation (2012) or newer, with iOS 8 or higher operating system required for iPad option)

*Contact Your Local Claas Dealer For Pricing*

Large Square Balers - 110 Gallon Application Systems

Baler Model600 Series Automatic
Electronic Control
Manual Control
Upgrade to Automatic
Quadrant 21006964509B4914509N/A6654509B
Quadrant 22006964499B4914499N/A6654499B
Quadrant 3200, 33006964537B4914537N/A6654537B
1100, 1500 (55 Gal Tank) 6524520B4484520Call Harvest TecCall Harvest Tec

Round Balers - 25 Gallon Application Systems

Baler Model300 Series Automatic
Electronic Control
Upgrade to Automatic
Variant 260, 280, 3603464484C441448443944843U64484C
Rollant Fixed ChamberN/A44144844394484N/A


Baler StyleMoisture Only KitUpgrade to Auto Applicator
Round Baler030-300RBContact Harvest Tec
Large Square030-0600Contact Harvest Tec


DescriptionPart Number
400 Series iPad Conversion Kit (Bluetooth receiver)030-4672A
600 Series iPad Conversion Kit (Bluetooth receiver)030-6672A
iPad Mini Mounting Kit030-2012MK
Baler Mounted Moisture Tester008-FX2000
Hay Indicators (Crop-Eyes)030-474A
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

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