Home / Products tagged “thermocouple 531” thermocouple 531 Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low Sort by Name: Alphabetical Thermocouple Plus | 531 Equivalent Vacuum Sensor | .001 to 6 Torr Accuracy Equivalent type 531 thermocouple vacuum gauge tube. Replacement tube for Bullseye Precision Gauge. Accuracy range .001 Torr to 6 Torr. $82.38 Add to cart