JONES STEPHENS Hot Water and Refrigerant Line Thermometer Straight Pattern with Steel Well 1/2 in. NPT (40 to 280° F) J40500 - The Home Depot
Winters TSW174-2LF Well Hot Water Thermometer, 1/2" NPT, 30 to 250 degrees F, ±1% accuracy: Science Lab Bi Metal Thermometers: Amazon.com: Industrial & Scientific
1/2" MIPT 90 deg Angle Thermometer
MEANLIN MEASURE 1/2" NPT Bimetal Thermometer for hot Water, boilers, and Pipes,2-1/2" Dial, 2-1/4" Lead-Free Brass Stem,Temperature Range 0-250°F/-20-120 ° C, Accuracy 2%,Center Back Mount: Amazon.com: Industrial & Scientific
Dot Line 2-Inch Dial Thermometer - Enlarging Accessories
MEANLIN MEASURE 1/2" NPT Bimetal Thermometer for hot Water, boilers, and Pipes,2-1/2" Dial, 2-1/4" Lead-Free Brass Stem,Temperature Range 0-250°F/-20-120 ° C, Accuracy 2%,Center Back Mount: Amazon.com: Industrial & Scientific