The Thermocouple Pipe Strap Probe is designed to measure large diameter pipe surface temperatures that standard pipe clamp probes may not fit around, it's perfect for tight spaces. The temperature of a pipe can be read immediately when the probe is plugged into any Type K Thermocouple Instrument. Easy to install, fits pipes up to 3.3" (84 mm) in diameter. Special strap-hook design allows you to quickly secure the probe to the pipe.