Description: This sensor works with a Powerflash interface to provide a way to sense inordinately high temperatures or the early failure of a residential refrigerator. Discount Sale: USD 22.99 Price: USD 44.00 and you save USD 21.01. We are "the Internet Affiliate", is an independent contractor for the vendor, and is providing internet affiliate services to the company via the internet for which we may earn financial compensation from vendor.