Great question! We hear this all the time and it is why the Sierra meter is such a popular a choice by scientists and technicians “in the know”. Sometimes the pressure based flow transducers are called Volumetric or Mass Flow Meters. A pressure based meter is essentially a "Volumetric" device with the addition of the corrections required to compensate for the flowing gas, pressure, temperature and other second and third order effects.

Tradition and it is not a good one. SCCM and SLPM refer to an "implied" density, the S in SCCM, which is determined by the calibration conditions chosen for your meter. Using air as an example, we know the density of air at the STP conditions (Standard Temperature, and Pressure) of 0 Degrees C and one atmosphere is1.293 g/cc. Knowing this we can convert SCCM to g/m.

Fluid enters the sensor and travels through the sensor's flow tube(s), which vibrate and twist. The twisting characteristic is called the Coriolis effect. According to Newton's Second Law of Motion, the amount of sensor tube twist is directly proportional to the mass flow rate of the fluid flowing through the tube. The Micro Motion TUTOR? training program features an animated flow theory demonstration.

A - It is an electronic unit that measures the amount of air being drawn into the engine. Its output is a variable voltage that changes in a direct relationship to the mass (weight) of air passing through it into the engine. The fuel injection "brain" uses this voltage as one of several inputs in order for it to calculate the length of time the fuel injectors need to be open and hence maintain the correct fuel/air ratio mixture under all conditions.

Thermal mass is the ability of a material to retain heat. The thick walls of an Earth Block building create thermal mass, protecting the occupants from extreme temperatures with a building that stays cool in the summer and warm in the winter. Heating and cooling requirements in an Earth Block building are substantially reduced in an Earth Block home.

Every single 800 Series Sierra Flow meter is calibrated on a Primary Standard. Sierra does NOT use transfer standards. We can not stress how beneficial this is to YOU as the end user! The reason nobody else calibrates EVERY meter on a Primary Standards because the cost to calibrate Flow Meters with Primary Standards is IMMENSE however it is TRULY the ONLY way any company manufacturing Mass Flow Meters with accuracies of 1% or better could justifiably make such claims of accuracy.

Depending on which mouthpieces you are using your Peak Flow or In-Check should be cleaned regularly. If you are using Disposable One-Way Valve Mouthpieces or Disposable Bacterial Filters you should clean the devices on a weekly basis. If you are using Disposable Two Way Mouthpieces or Universal Sterilisable Mouthpieces the devices should be cleaned after every use

The best and most concise info we found on the web is at http://www.epsea.org/mass.html And, yes it can be incorporated into the PyramoduleTM as the sketch on this website will show.

Our current offices are in Austin,TX and San Rafael, CA. The FLOW Board and Executive Team are located across the country and our members are located all over the world. FLOW is constantly expanding and is likely to have a growing number of global offices.

There is a big difference as one unit is directly measuring pressure while the other is measuring airflow direction. Units that list the capability of measuring flow rates of .0001” WG are air flow monitors not pressure monitors. This capability is inconsequential for monitoring isolation rooms because a negative pressure reading as low as -.0001” is virtually insignificant in the air pressure differential between the controlled space and the referenced space to be compliant.

A peak flow meter is a device you can easily use at home to check how open your airways are. It can help you keep track of how well your asthma is controlled. You use it by taking a deep breath and blowing hard into a plastic piece that goes in your mouth. Then, write down the resulting number that appears on the meter. Peak flow meters are most helpful for people with moderate or severe asthma.

Flow tube(s) inside the sensor vibrate at their resonant frequency, much like a spring with a weight attached to one end. The resonant frequency is a function of the mass of the fluid inside the tubes, which is a function of tube volume and fluid density. Thus, the resonant frequency is related to the fluid density inside. Therefore, for a given sensor, density of the fluid can be determined by measuring the resonant frequency of the sensor flow tubes.

Because mass is virtually unaffected by changes in pressure or temperature. Micro Motion Coriolis mass flowmeters measure mass directly. In contrast, volumetric flow measurement technologies such as differential pressure, positive displacement, turbine, or vortex, must perform pressure and temperature compensation to calculate mass. Each form of compensation introduces possible errors into the measurement and additional breaks in the customer piping (potential leak points).

A Meter-Based Surge Protector is a high-energy surge protection device that is installed directly behind the electric meter of your business. All power coming into your business runs through the Meter-Based Surge Protector, making it the first stage of protection against surges.

You lower the circuit tube in the water bottle to 7 cm H2O. If using the Airways canister bottle, add water to the 7 cm H2O level.