... safe, and reliable. 6. Double-infrared liquid level sensor, pressure protective system to ensure machine operation easy and safely ... system, which connect oil pump, heater and liquid level sensor, avoiding blank heating, blank pumping, oil leak and ... , completely closed structure, waterproof, dustproof, it can move long distance working in field.Technical Parameters Index nameUnitZYM-30ZYM-50ZYM-65ZYM ...