GRAINSAFE 4000 Advanced Protection

The GrainSafe 4000 is the perfect solution for smaller grain storage facilities looking for a cost-effective aeration controller.

With control of a maximum of four storages in a compact and easy-to-use interface, complete control of your aeration fans is performed intelligently and automatically.

Product Description

Our most affordable entry-level controller with a maximum of four storage outputs designed as a cost-effective solution for smaller storage facilities. This controller has all the operational modes required for high quality grain storage, delivered in a compact and affordable format.

With a simple interface as well as automatic control option, this controller can maintain your grain quality for extended periods of time. 

It features six operational modes to help make this happen in any situation:


Automatically cycles the storages through a rapid cooling process and transfers into a long-term maintenance mode.

Auto Purge:

Large amounts of cool air to flush harvest heat (average of 12Hrs/Day).

Auto Protect:

Introduces smaller amounts of cool, dry air to maintain grain quality over long periods of time (average of 3.25Hrs/Day). 

Auto Continuous:

Continual fan run with the added benefit of humidity override.


A manual mode that allows the fans to run continuously.

Setpoint Drying (Optional):

Allows the operator to set humidity setpoints to assist with grain drying (ambient) during storage.


  • Controls 1 to 4 storages 

  • Six operational modes 

  • USB port for software update or data extraction

  • Included ‘Test’ function for checking correct operation of electrical aeration equipment

  • Set Point drying options

  • Configurable in both mains and generator powered applications

  • Data Logging for improved traceability

  • Complete with sensor for measuring ambient conditions

  • Easy-to-use software with simple operating icons 

GrainSafe 4000 display showing ambient air properties
GrainSafe 4000 display showing grain storage settings for multiple silos
GrainSafe 4000 display showing grain storage settings

Interested in the
GS 4000?

Contact us for more information. 

Contact us


Reach out to the Control Unlimited team today

07 4634 4706

Unit 8, 493 South St,
Toowoomba Qld 4350


One of our friendly team members will get in touch with you to answer your questions and discuss your requirements

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Send us a quote for Grain Aeration Solutions

Control Unlimited are ready to assist you with everything from Grain Aeration Controllers right through to installation and service.

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Let us know some detail about your situation. One of our friendly team members will get in touch with you to answer your questions and discuss your requirements

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Request a Demo


Contoller Software demo

This demo really isn’t a big commitment or difficult to do. Please see below for our demo process: 

  1. Request a demo using the form below. This will then send us an email with your details. 
  2. Your details are then entered into our system as soon as possible and then immediately assigned to the demo controller. 
  3. You will receive an email with your username and password. 
  4. Head over to and enter the details in the email we sent you. You will have access to the controller we have in our workshop. 
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