The vibrating cylinder technology enabled the birth of a barometer of premium quality. A solid-state transducer implemented in the Digital Barometer MSB780X offers world-class parameters.
How does the barometer work?
A transducer installed in the Digital Barometer MSB780X operates on a principle of a vibrating cylinder. The natural frequency of the cylinder oscillation depends upon the applied pressure inside. The vibrating cylinder is embedded in a vacuum housing and the inside of the cylinder is connected to an air source. The use of high-elasticity and low hysteretic materials results in a highly stable and high-resolution measurement method. Classed as a "vibrating element" sensor, the device presents exceptional measurement performance by virtue of its operating mechanism.
4 main advantages of the vibrating cylinder
1. Stable vacuum
The monolith the transducer is made of causes minimum leakage of the air molecules - compared to other materials such as silicone. The permeability is very low or close to zero and therefore the vacuum inside of the cylinder is stable and guarantees better long-term stability.
2. Overload
The barometer operates in a range of 500 to 1100 hPa and can withstand overpressure up to 4000 hPa without the need for re-calibration. In the event of overload, the alloy element resists and no deformation or irreparable damage to the measuring element occurs.
3. Thermal hysteresis
The cylinder is made of Ni-Span-C, nickel-iron-chromium alloy, which is the material used for its low thermoelasticity. Exposure to extreme temperature does not result in material deformation and expansion mismatch issues. Even more accurate pressure reading is achieved by compensating for air humidity. This minimizes the required level of correction for temperature errors and increases the overall accuracy of the atmospheric pressure.
4. Measurement
The advantage of the vibrating cylinder technique lies in the mechanism that converts the change from pressure to a change in frequency. When pressure is applied, the stress generated in the wall of the cylinder affects the frequency directly. The cylinder acts as the complete measurement system and it is only necessary to maintain it in resonance so that the frequency can be measured.
Usable in the harshest environments while still customizable
Thanks to the unique technology principle, the sensor is designed for use in professional meteorological and aerospace applications which require reliable and highly accurate measurement, fast dynamic response, and advanced long-term stability.
These qualities put the sensor in a prominent position among the currently available barometers on the market. Heavy-duty metal enclosure, high stability, and minimal change over a long period of time reduce the cost of maintenance activities, provide the low cost of ownership and ensure life-long durability. Reliability features self-tests and error reporting provides the user with the assurance of accurate measurement of the barometric pressure.
