Clip on Pipe Clamp HVAC Thermometer - Clip on Thermometer Pipe Temperature Gauge for Measuring Temperatures of HVAC Hot Water Pipes and Radiators: Amazon.com: Industrial & Scientific
Klein Tools 69140 K-Type Thermometer, Pipe Temperature Clamp for HVAC, Measures -4 to +212 Degrees Fahrenheit - - Amazon.com
0-120℃ Stainless Steel Clamp-on Tube thermometer On Tube Heating Spring 63mm - Walmart.com
Fluke - -20 to 300°F, Pipe Surface Clamp On Thermometer - 73343535 - MSC Industrial Supply
Thermometer Clamp - Walmart.com
testo 115i pipe-clamp thermometer operated via smartphone | Surface temperature measurement | Temperature | Parameters | Testo, Inc