TR21 | 20K OHM NTC NON-LINEAR TEMP WALL MODULE SENSOR ONLY Incl. Vendor Surcharge $29.49 SKU: TR21 MANUFACTURER: Honeywell Parent Item Parent Item - Additional Cost Has Item Option Quantity -+ If you add this item, you're only $771 away from free shipping! Add to Cart Add to Cart Current Stock: 87 Details TR21 | 20K OHM NTC NON-LINEAR TEMP WALL MODULE SENSOR ONLY Documentation Data Sheet DetailsDocumentationBackTR21 | 20K OHM NTC NON-LINEAR TEMP WALL MODULE SENSOR ONLYBack Data Sheet