Blue Spot Tools - Stove Pipe Thermometer | DIY at B&Q
Clip On Hot Water Pipe thermometer 0-120C 63MM Radiator Thermometer Balancing Temperature Gauge with Spring Bimetal Stainless Steel Surface Contact for Radiator Pipe Temperature : Amazon.co.uk: DIY & Tools
magnetic surface pipe dial thermometer - ideal for radiators : Amazon.co.uk: Home & Kitchen
Clip on pipework thermometer with range 0 to 120 C&F | Brannan