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Rika Sensors indoor air pollution monitor Rika Sensors branded products are always delivered with the cost performance ratio that exceeds customers’ expectations. The brand value proposition spells out what we do for customers all around the world – and explains why we are one of the trustworthy manufacturers. In a couple of years, our brand has spread out and won a high degree of recognition and reputation among overseas customers.ultrasonic tank level sensor,level indicator,non contact level sensor.