Industrial Data Collection
Analysis and Control

Madison

Fluid Sensing Solutions

Radar Liquid Level Sensors:

R3-100C232-ATE
Single Frequency Radar Level Measurement50 or 100 Ft Range

For turbulence, uneven surfaces, high pressure, vacuums
Programmable via communications port or Push Button
RS232 or RS485 comm port options
NEMA 4 (IP65)

Data Sheet

R4-100R2R6
Dual Frequency Radar Level Measurement33, 50 and 100 Ft Range

Increased range over single frequency radar
Also used for open channel flow and uneven, dusty solids (gravel and aggregates)
6.3 GHz and 26 GHz options

Data Sheet

Operating Principle

The microwave rod antenna is stimulated by an electromagnetic pulse transmitter and sends very short pulses to a target. The pulses reflect from the target and then they are received back by the same antenna. The electrical signal from the antenna is amplified and processed. The distance to an object is calculated and then converted to 4-20 mA. Optionally, level information is also sent to a PC via RS232 or RS485 for diagnostic data logging and programmable set-up.

Unit Architecture

Simple mounting and push-button calibration make for a very easy installation. Calibration can be completed on the bench or in the field by following simple instructions. The sensor can be threaded directly into a 2" NPT metal or plastic flange. Madison Radar Liquid Level Sensor

Radar Sensor Still-Pipe Mounting:

No end cut is required for pipes with Inner Dimensions of 6" or less.

End cut of 45° is required for pipes longer than 10.5"; the ID of the pipe must be greater than 6".

Madison point level float switches use reed switch technology that is simple, reliable, and durable. They operate in an on/off state, and are used to control an external device such as an alarm or an on/off switch. Because OEMs need sensors for tanks that vary in width and height, certain point level float switches are offered with field-adjustable stem lengths. This provides an OEM with the advantage of using only one or two sensors for their application instead of several.

RFQ:

Radar features:

Madison Company's radar sensors are highly accurate, noiseless and self-adjusting pulse radar transmitters for distances up to 100'. The sensors adjust their microwave pulse amplitude and width to a target distance and target reflection properties. The receivers change their sensitivity with the amplitude of received echoes. In addition, the sensors analyze the shapes of the received echoes and eliminate the ones coming from tank walls, standpipes and other obstructions. These features allow the sensors to track any wanted target from the tips of their rod antennas to the bottom of the tank, regardless of the tank shape or environmental conditions.

For very low dielectric constant materials (≈ 2), the radar sensor needs at least 2' from the antenna tip to detect the material. Any buildup on the rod antennas does not deteriorate the performance of the radar sensors. The radar transmitters do not have any mismatch between resonator and transceiver. This eliminates problems when a target is close to the antenna and gives optimal performance of the radar sensor's very high efficiency. The Madison radar sensors also feature a low dielectric mode. In this mode, the Madison sensors will ignore echoes from tank bottoms with material present, and they will increase their transmit energy and the sensitivity of their receivers until they detect echoes from the surfaces of the low dielectric materials. This mode will work with dielectrics around 2 and higher.

Industrial Data Collection Analysis and Control