-Safety Protection Upgrade: Thermocouple with Tilt Switch for Outdoor Security Built-in thermocouple with tilt switch, when the patio heater tilts accidentally, the weak current switch (R≤10mΩ) triggers gas cut-off immediately. Equipped with dual certifications, it eliminates the risk of gas leakage from the source, making it a safe choice for thermocouple for patio heater.