6. Thermostats, Hygrostats, Pressure-stat

6.1 Temperature (Thermostats)
6.1.6 Immersion Thermostat and Guard with Limiter and Protection Pocket

6.1.6.1 Immersion Thermostat (TR)
6.1.6.2 Immersion Temperature Guard (TW)
6.1.6.3 Immersion Safety Temperature Guard (STW)
6.1.6.5 Immersion Safety Temperature Limiter (STB)