Contact Us


If you have a question or issue please call 1-800-809-4899 to speak to our customer service representatives. 

Please email for questions about TemChek™ units


Wholesale/Bulk Purchasing

Please email for wholesale/bulk purchasing.


Donations/Donation Drives

Please email for further information on how to donate.

Or if you are sending a check please send checks payable to Hartstone Designs, mailing address is 150 Industrial Court Kalispell MT 59901. Please include a note if you wish your donation to go to a specific school or location.

Please email if you'd like us to host a Donation Drive for your county schools 

Our customer service representatives can also help answer any questions in regards to Donations or Donation Drives, please call 1-800-809-4899.