9400

Application
The 9400 series guided wave radar level transmitter is a breakthrough in cost effective very high accuracy, very high resolution liquid level sensing for heavy duty applications. Rochester Sensors’ GWR level sensor is the culmination of years of research into micropower impulse radar, time domain reflectometry and equivalent time sampling. Rochester Sensors Model 9400 liquid level sensor is used to monitor liquids such as fuels, chemicals, water, coolant, lubricants and other materials. The device is capable of maintaining very accurate level readings regardless of liquid. The 9400 can optionally be configured to accurately measure both fuel level and the level of dissimilar materials, such as water/fuel interface. The device emits a series of electromagnetic pulses down the sensor probe. Liquid/air interface, and dissimilar liquid interfaces provide a change in the characteristic impedance of the sensor probe, and create a reflection of the pulse. The time-of-flight of the reflected pulses is measured, and the liquid and interface levels are calculated.

• Commercial vehicles and buses
• Construction and mining machinery
• Agricultural machinery
• Mobile and stationary power generators, pumps and compressors

As depicted in the chart below, the Model 9400 has many advantages that other technologies do not and has a similar cost to ultrasonic or capacitive solutions but much cheaper than a typical guided wave radar product for process control applications.

Documents
9400 Introduction
Data Sheet