The slurry is a combination of two types of matter- solid and liquid. To measure the level of any slurry in metallurgy or ore mining, its composition plays an important role. There are multiple techniques that provide level measurements. They are broadly classified as contact-based and non-contact based. Since contact-based level measurement technology is highly receptive to corrosion along with a risk of reaction due to different types of elements mixed together in the slurry, the non-contact based technology is the most sought-after in the industry. There are five different types of non-contact based technologies available for level measurement nuclear, laser, weight, radar, and ultrasonic. Among all the technologies available, ultrasonic is the most widely used.
Ultrasonic level transmitter is the go-to level measurement technology due to its simple operation, cost-effectiveness, and easy installation. At the same time, ultrasonic is completely non-contact based so its application suits any type of liquid irrespective of its composition. When it comes to the slurry, different metal compositions and alter the accuracy of measurements if other measurement technologies are chosen. For example, nuclear technology is applicable to relatively small vessels. Also, safety and licensing are an issue. The reactive nature of the metals makes it an unviable option in the case of reactive elements in the slurry. Laser and weight technology have been used mostly in the selective niches of powders and solids in bulks, and small vessels respectively. Radar technology is another alternative to ultrasonic however, the high cost involved in more precise options make it a less favourable choice.