Temperature measurement and control thermocouple for high temperature and pressure in the petroleum, chemical and other production processes in high-temperature high-pressure workplace. Refineries, high-pressure polyethylene and other essential temperature devices. Electrical outlet: M20x1.5, NPT1 / 2 connection Size: M20x1.5, NPT1 / 2 Protection: IP65 Explosion-proof grade: d‖BT4, d‖CT5 PN: 15-40MPa thermocouple Class I according to the protocol order; protection tube material remaining orders according to the agreement; the model 430 waterproof type, model 440 is explosion-proof. Protection tube material and selection; high temperature corrosion resistance, usually used as a general heat-resistant steel; low carbon content, with good resistance to intergranular corrosion, often used as a general heat-resistant steel; low carbon content, with good resistance to intergranular usual used as a heat-resistant steel; ultra-low carbon content, with good resistance to intergranular corrosion, usually used as a heat-resistant steel; high temperature oxidation resistance, corrosion resistance, usually as heat-resistant steel; nickel-based high temperature alloy, having excellent oxidation resistance, corrosion resistance, commonly used as a heat-resistant steel. For details, see: www.ybzhan.cn/st27223/product_6639581.html