Manometers

Bourdon tube manometer Eugène Bourdon invented in 1849 the Bourdon tube manometer. Nowadays is the most common mechanic measurement system of high-pressure measurement (between 0,4 bar and 6000 bar) and consist in a metal tube, and consisting of a metal, flattened, sealed tube, closed at one end and spirally wound that expands when increasing the internal pressure. Mr. Bourdon founded the French expert in manufacturing manometers Bourdon, which later merged to be called BOURDON SEDEME and now belongs to the Swiss Baumer group. Sensotec Instruments is been distributing from the 80s, the prestigious brand in Spain and Portugal. Sensotec Instruments [...]

Case manometers The differential pressure is a measure of the difference pressure between two connections (independent of the static or linear pressure that may exist). This system measures low differential pressures. In this case, the sensible element is built by two thin waved walls, joined by a laser welding. The case is deformable under the effect of pressure. This deformation acts over the mechanism, moving the needle in the centre of the sphere. The most usual models correspond to the series MDX and MCD. Other characteristics are: Material. The parts in contact with the fluid and other parts of the [...]

Electric switches The micro-switches that move the needle open or close one or two electrical switches accessible by a cable or connector situated in the case. These switches, that can put the desired pressure value, are applied in the activation of devices or as alarm activation. The electric switches can be dry (only for mechanical contact), magnetic (where a magnet increases the contact junction and a hysteresis is carried out in the disconnection).   Analogic output It is a system underused where the needle acts on a transmitter with output 4-20 mA.   Special spheres Sensotec Instruments provides customized spheres [...]

Column manometers This are the elements which we measure the positive, negative and differential pressure. They can have different ranges. The simplest manometer consists in a glass tube folded in U, containing liquid (mercury, water, and oil amongst others). A branch of the pipe is open to the atmosphere (or to the second pressure output in case of differential pressure measurement), the other is connected to the tank containing the fluid whose pressure is going to be measured. The fluid of the tank moves through the U until reaching an equilibrium that we can measure through a graduated scale. The [...]