The MCT 360 moisture in biofuels gauge, enclosed in a cast aluminium enclosure, is designed to operate under adverse environmental conditions; dust, high humidity and extreme temperatures. An air purge attachment which attaches to the window is sold as an integral part of the gauge, as is the cooling panel. The air purge keeps the window and optical path free of dust and steam. In the event temperatures exceed 50°C routinely a vortex cooler and clean air supply can be attached to cool the gauge. A 4-20mA , 0-10V or digital signal comes directly from the sensor head. An operator interface is practical for display and calibration purposes but isn’t essential. An Atex 22 MCT 360 is available for use in potentially explosive dust environments and the MCT 330-HD will operate up to temperatures of 65°C without any need for cooling. For coating applications the guardian cross web profile system will enable tight control of the coat weight.
Commonly sold accessories sold to this industry include: a sapphire viewing window mounted in a stainless steel flange for viewing into a hopper, a probe to measure moisture in vertically falling product and a powder sampler to measure moisture in falling product when the flow is insufficient, or density is too low to obtain good product presentation across the probe window. A product loss sensor is useful to ensure measurements don’t update when there is a break in production, and a product hi/lo alarm board will alert the operator when moisture exceeds the limits set.
Gauge outputs, Operator Interface & Display
Up to 3 x 4-20MA or 0-10V
RS232 or RS485
Optional Operator Interface and display unit
Measurement accuracy is very dependent on particle size, homogeneity and state of equilibration of the product. Accuracy will be higher on sawdust than woodchips of variable size, this is owing to the fact that smaller wood chips will be dryer than larger woodchips due to the larger surface area to mass ratio. Hog fuel will have a lower accuracy due to the fact that it is a mixture of various components of the tree and any product measured in close proximity to a dryer exit will be in a state of variable equilibration, and will not give a reliable moisture measurement..