for visual temperature indication in circulation systems, display range 0-80 °C, tolerance class 2, for insertion into the shut-off unit of the MULTI-THERM, the test nipple of the MULTI-FIX circulation regulating valve and the test nipple of the MULTI-T-STÜCK, suitable for all nominal diameters, can be used for all valves with a frontal drain hole in combination with axial drain valve (J710915000) and immersion sleeve (J810115002)