The BK-1/EX drive level switch is installed at the corresponding position on the outside of the main body of the magnetic flap level gauge as a liquid level alarm or control. The original XQ transmitter is in the form of a dry reed switch. It is a single-contact type and, of course, a small number of double contacts. BURGESS special company selection switch now, the magnetic drive cam, so that the level switch having a bistable memory (a dual-contact a normally open normally closed combination type). The switch is mounted on the main body of the magnetic flap level gauge and is in the same magnetic coupling system as the liquid level gauge, and is not in contact with the process medium. With high temperature, explosion-proof and shock protection. There are two differences between the BK-1/EX drive level switch and the XQ transmitter. One is that the operating temperature is high and the maximum operating temperature is 320°C. Secondly, the output power is greater.     The BK-1/EX drive level switch, also known as the BK-1/EX triple magnetic drive level switch, is mounted on the magnetic flap level gauge and is located in the same magnetic coupling system as the level gauge. The float moves up and down with the level change. When the float approaches the level switch from bottom to top, the magnetic field generated by the magnetic steel in the float is repulsive to the magnetic field generated by the magnetic steel in the level switch, and the magnetic steel in the level switch is pushed. And the connected cam swings to drive the switch action, the float continues to rise, the switch remains in this state, and when approaching the liquid level switch, the repulsion between the magnetic fields pushes the level switch to switch state and hold again, so the switch has a bistable state memory function. Products use special switches, large contact capacity, high temperature resistance, is the most practical and most reliable additional control or alarm device applied to the magnetic flap level gauge. Technical Parameters Switch type: cam magnetic drive switch, single pole double throw, with shock protection. Contact capacity: 8A 220V AC. (Explosion-proof type contact capacity 24V0.5A) Electric strength: ≥12.0MV/m Enhanced Polycarbonate (PC) Housing Heat resistance: Heat distortion temperature ≥150°C, long-term use at 120°C. Anti-aging: 10 years after outdoor exposure, its strength retention rate is above 60%. After installation and insulation accessories, the process temperature can reach 150°C Protection class: IP65 Explosion-proof mark: Intrinsically safe type: ExiaIICT5, Associated equipment: GS 8000-EX isolation barrier Wiring: communist / is the original ON OFF The lower common/ is the original ON OFF High temperature -25 ~ 300 °C please use stainless steel shell BK-1/EX three magnetic drive level switch Chrome-Moly Steel Bar 4140 steel round bar,42CrMo4 steel round bar,SCM440 steel round bar,42CrMoS4 steel round bar,1.7225 steel round bar SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.sdbrightsteelbar.com
Contact form: a double contact a normally open normally closed combination type, power-driven (SPDT)
Insulation resistance: ≥1.0 × 10 ¹² 
Working temperature: -25~150°C, special
Electrical interface: M20×1.5 female thread 