Radar level sensing handles tough environments
An
Automation Products Group product story
Edited by the Engineeringtalk editorial team
Jan 22, 2008
Pulse Radar sensors will operate over long distances even with target materials that have moderately low di-electric constants.
Automation Products Group (APG) has released Pulse Radar level sensors.
Pulse Radar sensors deliver accurate, reliable noncontact level measurement in challenging environmental conditions that can reduce the reliability and accuracy of other types of sensors, such as ultrasonic sensors.
Providing the process industry standard output of 4-20mA, the sensors operate using a frequency burst at 6.3GHz.
Pulse Radar sensors provide a detection range up to 30m and resolution of up to 5.7mm.
The standard operating temperature range is -40C to +60C, with higher temperature ranges available on special order.
"The primary advantage of APG's Pulse Radar sensors is the self-adjusting-signal and target-tracking technology".
"This technology enables the sensor to automatically keep the signal at an optimal level to maintain and track the target throughout the measuring range and under a variety of target conditions", says Jon Cox, Automation Products Group Product Manager.
Pulse Radar sensors will operate over long distances even with target materials that have moderately low di-electric constants.
The sensor automatically adjusts the transmit power and receiver gain to optimise the return signal to a level that delivers accurate readings and is not affected by any interference.
The sensor is designed to overcome potential build-up on the antenna and avoids obstacles that may be installed near the detection path.
They also offer reliable operation in metal stilling wells.
Programmable software allows users to mask unwanted echoes and adjustable damping factors.
"Because Pulse Radar sensors use electromagnetic waves rather than sound waves, they are an suitable level sensing solution in applications with excessive foam".
"Electromagnetic waves are also unaffected by heavy fumes or vapour layers that can reflect ultrasonic signals, resulting in false readings".
"Additionally, highly corrosive or acidic materials can attack and break down the bonds inside an ultrasonic transducer and because radar waves are transmitted through an antenna of solid material, Pulse Radar sensors are unaffected by such media", says Cox.
Powerful electromagnetic waves also enable Pulse Radar sensors to be used in vacuum environments, as well as applications with rapid temperature changes, high-temperatures and high acoustical noise and those with long measuring ranges.
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