Tag Archives: vaakum

Leak Finder For Vacuum Systems

November 17, 2015Scientific Equipmenthelium, leak finder, leke, lekiotsija, level of vacuum, mass analyzer, mass spectrometer, mass spektromeeter, vaakum, vaakumsüsteemid, vac, vacuum, vacuum systemCaptain Corrosion

Leak finder for vacuum systems is explained and demonstrated in this short video. All you need is a spectrometer tuned for helium and a tank of helium. In order to find the leak, you need to expose the vacuum system locally to helium. If a leak is present then the gas is sucked inside and pumped out into the mass spectrometer. The beeping noise immediately alerts the user if helium has reached the spectrometer and the leak is found. The most common places for leaks are usually at the connections of the vacuum systems parts.

Quadrupole Mass Spectrometer

November 17, 2015vacuum gaugesanalyzer, kõrgvaakum, level of vacuum, mass analyzer, mass spectrometer, mass spektromeeter, mõõdik, pressure, quadrupole, quadrupole mass analyzer, quadrupole mass spectrometer, rõhuandur, rõhumõõdik, spectrometer, spektromeeter, vaakum, vaakum-meetrid, vaakummeeter, vaakummeetrid, vaakumsüsteemid, vac, vacuum, vacuum gauges, vacuum measurement, vacuum meter, vacuum systemCaptain Corrosion

The quadrupole mass spectrometer (QMS) is used to detect and measure the abundance of gas phase ions. These ions have to pass between electrically connected rods in order to reach the detector. By combining alternating and direct voltage on these rods, it is possible to ensure that only ions with specific mass-to-charge ratio are capable of reaching the detector.

Hot Filament Ionization Gauge

November 17, 2015vacuum gaugesgauge, hot filament ionization gauge, ionisatsioon, ionization, ionization gauge, level of vacuum, mõõdik, rõhuandur, rõhumõõdik, vaakum, vaakum-meetrid, vaakummeeter, vaakummeetrid, vaakumsüsteemid, vac, vacuum, vacuum gauge, vacuum gauges, vacuum measurement, vacuum meter, vacuum systemCaptain Corrosion

The hot-filament ionization gauge is widely used for measuring the level of vacuum. The electrons are emitted from a hot cathode and accelerated towards the anode. In that process the electron may ionize a gas molecule. That gas molecule is pulled towards the collector and ion current is measured with an ammeter.

Penning Ionization Gauge

November 17, 2015vacuum gaugesandur, gauge, ionisatsioon, ionization, ionization gauge, level of vacuum, mõõdik, penning, penning gauge, penning ionization gauge, rõhuandur, rõhumõõdik, vaakum, vaakum-meetrid, vaakummeeter, vaakummeetrid, vaakumsüsteemid, vac, vacuum, vacuum gauge, vacuum gauges, vacuum measurement, vacuum meter, vacuum systemCaptain Corrosion

The Penning Ionization Gauge, also known as cold cathode gauge is used to measure the level of vacuum. High voltage between the anode and the cathode causes gas discharge and the resulting ionic current is measured with an ammeter. The measured amperes are then converted into pressure units such as Pascals or Torrs.

Thermocouple Gauge

November 17, 2015vacuum gaugesgauge, level of vacuum, low pressure, low vacuum, mõõdik, pre vacuum, pressure, prevac, prevacuum gauge, rõhuandur, rõhumõõdik, termopaar, thermocouple, thermocouple gauge, vaakum, vaakum-meetrid, vaakummeeter, vaakummeetrid, vaakumsüsteemid, vac, vacuum, vacuum gauge, vacuum gauges, vacuum measurement, vacuum meter, vacuum systemCaptain Corrosion

The thermocouple gauge is a device used to measure low vacuum. A filament is heated up by passing a current through it. When gas molecules interact with the filament, heat is carried away. Therefore higher pressure in the chamber means that more heat is taken away. The temperature of the filament can be measured with a thermocouple where the generated voltage depends on the temperature. Therefore in this system the voltage of the thermocouple is measured and converted into pressure units like millibars or pascals.

Pirani Gauge

November 17, 2015vacuum gaugeseelvaakum, gas, gauge, level of vacuum, low pressure, low vacuum, measuring vacuum, pirani, pirani gauge, piranimõõdik, rõhuandur, rõhumõõdik, vaakum, vaakummeeter, vaakummeetrid, vaakumsüsteemid, vacuum, vacuum gauge, vacuum gauges, vacuum measurement, vacuum meter, vacuum systemCaptain Corrosion

The Pirani Gauge is used to measure low vacuum. In the system tungsten filaments are heated up by passing current through them. As gas molecules interact with the filament, heat is carried away and electrical resistance changes. Therefore if the measured current or voltage can be converted into pressure units.

Diaphragm Pump

November 17, 2015vacuum pumpsdiaphragm, diaphragm pump, eelvaakum, gas pump, level of vacuum, low vacuum, madalvaakum, membraanpump, membrane, membrane pump, pre vacuum, prevac, prevac pump, pump, pumps, vaakum, vaakumpumbad, vaakumpump, vaakumsüsteemid, vac, vacuum, vacuum pump, vacuum pumps, vacuum system, vacuumpumpCaptain Corrosion

Diaphragm pump (membrane pump) is an oil-free vacuum pump that is used for obtaining ‪#‎prevacuum‬ of about 0.5 mbar. The pumping in this device is based on the movement of the membrane. As the membrane is pulled down, the volume of the chamber increases, causing a drop of pressure and gas enters the chamber through the inlet. Next, the inlet is closed, outlet opened and the membrane pushed up. This causes the volume of the chamber to decrease and pressure to increase. So the gas is forced to leave the system through the outlet.

Sorption Pump

November 17, 2015vacuum pumpseelvaakum, gas pump, level of vacuum, low vacuum, madalvaakum, pre vacuum, prevac, pumbad, pump, pumping gas, pumps, sorption pump, sorptsioonpump, vaakum, vaakumpumbad, vaakumpump, vaakumsüsteemid, vac, vacuum, vacuum pump, vacuum pumps, vacuum system, vacuumpumpCaptain Corrosion

The sorption pump is an oil-free ‪#‎prevacuum‬ pump that is based on the adsorption of gases on cold surfaces. The colder the surface, the more efficient the pumping is! Therefore liquid nitrogen with a temperature less than 77 degrees Kelvin is used for cooling the adsorber. The adsorber is a porous zeolite with a very large surface area as the pores have a diameter in the range of a few nanometers (or less). If the pump is full, then it needs to be renewed by degassing, which is basically heating the adsorber so that the gas can remove the pump through the outlet.

Rotary Vane Pump

November 17, 2015vacuum pumpseelvaakum, level of vacuum, low vacuum, madalvaakum, pre vacuum, prevac, pumbad, pump, pumping gas, rotary vane pump, rotatsioon pump, rotatsioonpump, vaakum, vaakumpumbad, vaakumpump, vaakumsüsteemid, vac, vacuum, vacuum pump, vacuum pumps, vacuum system, vacuumpump, vane pumpCaptain Corrosion

Rotary Vane Pump is an oil-based vacuum pump, that can be used to obtain ‪#‎prevacuum‬ or even medium vacuum (depending on the system). In this device the rotor and vane(s) are in the housing, that is filled with oil. When the gas enters the chamber through the inlet, it gets trapped in the oil and is transported through the working chamber with the help of the rotor and vane(s) to the outlet, where the gas exits the system. The oil acts as a lubricant and also allows the pumping of some corrosive gases, as it protects the metal to some degree. Although this pump is quite fast and efficient for obtaining pre vacuum, it also may contaminate the vacuum system with oil. Therefore the use of oil traps is highly recommended.

Scroll Pump

November 17, 2015vacuum pumpsõlivaba kerija pump, compressor, gas pump, kerija pump, level of vacuum, low vacuum, madalvaakum, pre vacuum, prevac, pump, pumping gas, pumps, scroll, scroll compressor, scroll compressor pump, scroll pump, vaakum, vaakumpumbad, vaakumpump, vaakumsüsteemid, vac, vacuum, vacuum pump, vacuum pumps, vacuum system, vacuumpumpCaptain Corrosion

Scroll pump (scroll compressor) is an oil-free vacuum pump used for obtaining ‪#‎prevacuum‬ with a level of 0.1 mbar. The ‪#‎scrollpump‬ is based on two scrolls, that are placed insede the working chamber. One of these scrolls is fixed and the other one mobile. Once the gas enters the system through the inlet, it gets carried to the outlet in the middle by the mobile orbiting scroll. This is possible due to the fact that during the mobile scrolls movement a wide gap is locally kept between the two scrolls and the gap moves to the middle, carrying the gas in it. As the volume of the gap decreases at the outlet, the gas is pushed out of the system. Due to wear the orbiting scroll needs to be replaced about twice a year.