... paper making, environmental protection industry and so on. Ultrasonic can spread effective in lots of occasion, Such ... alarm and control (material level/liquid level)8. Temperature range: -40°C~ +75°C9. Protection grade: IP6710 ... .Shell material: ABS11.Pressure range: ±0.1MP12.Electronic unit shell material:Die casting ... ,5m,7m,10m,15m Universal Ultrasonic level meter\sensor