The TMA100 Series features a compact 1.38" dual-scale dial (50°–300°F / 10°–150°C) with a durable back mount design. It includes a 1/2-20 UNF threaded bulkhead stud, aluminum face shield, Buna N O-rings, and a zinc-plated jam nut. An aluminum stud helps protect the stainless steel probe, making it ideal for reliable temperature monitoring. Standard Features - TMA100 Series: An aluminum enclosure shields side of thermometer face 1.38 inch diameter dual scale dial thermometer, 50° to 300°F and 10° to 150°C Aluminum stud extends into reservoir to partially shield stainless steel thermometer probe 1/2-20UNF threaded bulkhead stud Buna N o-rings Back mount Zinc plated hex jam nut Pressure Rating: 125 psi (862 kPa) maximum operating pressure at 150°F (65°C) Access to inside of reservoir is required to mount the TMA100 Series thermometer.