It is oil of a specific density to correspond to the scale. I believe red is one density and blue another, at least for Dwyer manometers. I’m fairly sure replacement oil is available.

What is the red liquid in a radon mitigation system?

The u-tube (manometer) is a gauge that measures negative air pressure inside the radon system pipe. It is usually installed on the main suction point in the basement, but may be located in a garage or crawl space. The u-tube has red or blue non-toxic liquid in it.

What does a manometer measure radon?

The basic overview: A u-tube manometer measures and displays the suction in inches of water column. Inches of water column is the amount of pressure inside a pipe. The red oil inside is what you want to focus on. It shows the pressure within the radon vent pipe.

What should radon manometer look like?

Your radon mitigation’s manometer readout should be between 0.5in-1.75in on the Manometer (U shaped- looks like a thermometer). This is NOT the level of Radon in your home. It is simply the amount of vacuum your mitigation system is generating.

What is a U-tube manometer How does it work?

A manometer is an instrument that has a small tube in the shape of a U that is filled with liquid to measure pressure or flow. A U-tube manometer is used as an indicator that the fan on the mitigation system is working.

How do you read AU tube manometer?


Quote from Youtube video: Open-ended manometers a closed-end manometer is not open to the air. To read a closed-end manometer take the difference between the heights of the two columns of mercury.

How do you read a radon test?

Learn what the number of pico-Curies per liter means as it relates to the risk of damage and disease in your home or business.

  1. Greater than or Equal to 4.0 pCi/L. Above 4.0 pCi/L, you are putting yourself at unusually high risk for lung damage and cancer. …
  2. Between 2.7 and 4.0 pCi/L. …
  3. Less than 2.7 pCi/L.


Can a manometer measure liquid pressure?

A manometer is used for measuring the liquid pressure with respect to an outside source which is usually considered to be the earth’s atmosphere. Liquid such as mercury is used for the measurement of the pressure. The other end of the U-tube is filled with the gas for which the pressure needs to be calculated.

What is the density of the fluid used in the inverted U tube manometer?

Because the density of the manometer fluids commonly used is quite high (800–1000 kg m3), the sensitivity of the U-tube manometer is low.

What is inverted U tube manometer?

Inverted U-tube manometer is used for measuring pressure differences in liquids. The space above the liquid in the manometer is filled with air which can be admitted or expelled through the tap on the top, in order to adjust the level of the liquid in the manometer.

What type of liquid are measured using a manometer?

What type of liquids are measured using a manometer? Explanation: Measurement of liquid in a manometer takes place through differential pressures by balancing the weight. Thus, it is easier for the manometer to measure liquids of lesser density than the heavier ones. Example of a light liquid is Water.

What is the difference between U tube differential manometer and inverted U tube differential manometer?

ii) U-tube Inverted differential manometer:



As the U-tube upright differential manometer cannot measure the difference between two points when the difference is low. So another kind of differential manometer is needed to measure low pressure difference and this is done by U-tube Inverted differential manometer.

What is inverted differential manometer?

The Inverted differential manometer consists of an inverted U-tube containing a light liquid whose specific gravity is less than the specific gravity of the pipe liquid. The inverted differential manometer is used for measuring the difference of low pressure between two points.

How many liquids are used in differential manometer Mcq?

The U tube in the figure contains two liquids in static equilibrium.

What is the fluid substance?

What is Fluid? Fluids is a substance that cannot resist a shear force or stress without moving as can a solid. It is usually classified as liquids or gases. A liquid has intermolecular forces that hold it together so that it possesses volume but no definite shape.