These dial gauges are good for a quick and cheap measurement of the vacuum pressure. They are designed to read in the 0 to 30 in Hg range. Each gauge has a 1/4 male NPT pip thread on the back for making the vacuum connection.Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikapedia.org A Bourdon gauge uses a coiled tube, which, as it expands due to pressure increase causes a rotation of an arm connected to the tube.The pressure sensing element is a closed coiled tube connected to the chamber or pipe in which pressure is to be sensed. As the gauge pressure increases the tube will tend to uncoil, while a reduced gauge pressure will cause the tube to coil more tightly. This motion is transferred through a linkage to a gear train connected to an indicating needle. The needle is presented in front of a card face inscribed with the pressure indications associated with particular needle deflections. In a barometer, the Bourdon tube is sealed at both ends and the absolute pressure of the ambient atmosphere is sensed. The Bourdon pressure gauge measures pressure relative to atmospheric pressure, that is, they measure presure directly relative to the surrounding atmospherice pressure. For example, Albuquerque New Mexico at our facility is at 5,000 feet above sea level with an atmospherice pressure of 630 mmHg. A bourdon gauge calibrated at sea level (760 mmHg) would read about 5 inHg of vacuum at our location.

These Bourdon needle dial vacuum measure gauges measure both positive pressure from 0 to 30 PSI (pounds per square inch) and vacuum pressure from 0 to 30 inHg (inches of mercury). There is 760 mmHg (29.92 inHg) of atmospheric pressure at sea level. These Bourdon vacuum pressure measurement gauges are low cost being quick and easy to use. However, they are very low accuracy gauges. Each tick mark in the vacuum is around 25.4 Torr. These Bourdon vacuum pressure measurement dial gauges are 3 inches high and have an 1/4 inch NPT vacuum flange fitting. They are made of corrosive resistant stainless steel. Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org

These Bourdon needle dial vacuum measure gauges measure both positive pressure from 0 to 30 PSI (pounds per square inch) and vacuum pressure from 0 to 30 inHg (inches of mercury). There is 760 mmHg (29.92 inHg) of atmospheric pressure at sea level. These Bourdon vacuum pressure measurement gauges are low cost being quick and easy to use. However, they are very low accuracy gauges. Each tick mark in the vacuum is around 25.4 Torr. These Bourdon vacuum pressure measurement dial gauges are 3 inches high and have an ISO-KF NW10 vacuum flange fitting. They are made of corrosive resistant stainless steel. Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org

These Bourdon needle dial vacuum measure gauges measure both positive pressure from 0 to 30 PSI (pounds per square inch) and vacuum pressure from 0 to 30 inHg (inches of mercury). There is 760 mmHg (29.92 inHg) of atmospheric pressure at sea level. These Bourdon vacuum pressure measurement gauges are low cost being quick and easy to use. However, they are very low accuracy gauges. Each tick mark in the vacuum is around 25.4 Torr. These Bourdon vacuum pressure measurement dial gauges are 3 inches high and have an ISO-KF NW16 vacuum flange fitting. They are made of corrosive resistant stainless steel.Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org

These Bourdon needle dial vacuum measure gauges measure both positive pressure from 0 to 30 PSI (pounds per square inch) and vacuum pressure from 0 to 30 inHg (inches of mercury). There is 760 mmHg (29.92 inHg) of atmospheric pressure at sea level. These Bourdon vacuum pressure measurement gauges are low cost being quick and easy to use. However, they are very low accuracy gauges. Each tick mark in the vacuum is around 25.4 Torr. These Bourdon vacuum pressure measurement dial gauges are 3 inches high and have an ISO-KF NW25 vacuum flange fitting. They are made of corrosive resistant stainless steel. Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org

These Bourdon needle dial vacuum measure gauges measure both positive pressure from 0 to 30 PSI (pounds per square inch) and vacuum pressure from 0 to 30 inHg (inches of mercury). There is 760 mmHg (29.92 inHg) of atmospheric pressure at sea level. These Bourdon vacuum pressure measurement gauges are low cost being quick and easy to use. However, they are very low accuracy gauges. Each tick mark in the vacuum is around 25.4 Torr. These Bourdon vacuum pressure measurement dial gauges are 3 inches high and have an ISO-KF NW40 vacuum flange fitting. They are made of corrosive resistant stainless steel.Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org

These Bourdon needle dial vacuum measure gauges measure both positive pressure from 0 to 30 PSI (pounds per square inch) and vacuum pressure from 0 to 30 inHg (inches of mercury). There is 760 mmHg (29.92 inHg) of atmospheric pressure at sea level. These Bourdon vacuum pressure measurement gauges are low cost being quick and easy to use. However, they are very low accuracy gauges. Each tick mark in the vacuum is around 25.4 Torr. These Bourdon vacuum pressure measurement dial gauges are 3 inches high and have an ISO-KF NW50 vacuum flange fitting. They are made of corrosive resistant stainless steel.Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org

These Bourdon needle dial vacuum measure gauges measure both positive pressure from 0 to 150 PSI (pounds per square inch) and vacuum pressure from 0 to 30 inHg (inches of mercury). There is 760 mmHg (29.92 inHg) of atmospheric pressure at sea level. These Bourdon vacuum pressure measurement gauges are low cost being quick and easy to use. However, they are very low accuracy gauges. Each tick mark in the vacuum is around 100 Torr. These Bourdon vacuum pressure measurement dial gauges are 3 inches high and have 1/4 inch NPT Male. They are made of corrosive resistant stainless steel.Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikapedia.org A Bourdon gauge uses a coiled tube, which, as it expands due to pressure increase causes a rotation of an arm connected to the tube.The pressure sensing element is a closed coiled tube connected to the chamber or pipe in which pressure is to be sensed. As the gauge pressure increases the tube will tend to uncoil, while a reduced gauge pressure will cause the tube to coil more tightly. This motion is transferred through a linkage to a gear train connected to an indicating needle. The needle is presented in front of a card face inscribed with the pressure indications associated with particular needle deflections. In a barometer, the Bourdon tube is sealed at both ends and the absolute pressure of the ambient atmosphere is sensed. The Bourdon pressure gauge measures pressure relative to atmospheric pressure, that is, they measure presure directly relative to the surrounding atmospherice pressure. For example, Albuquerque New Mexico at our facility is at 5,000 feet above sea level with an atmospherice pressure of 630 mmHg. A bourdon gauge calibrated at sea level (760 mmHg) would read about 5 inHg of vacuum at our location.

These Swagelok® deluxe Bourdon needle dial vacuum pressure gauges have a 1/4 inch male NPT inlet vacuum connection and can measure vacuum pressure in the 0 - 30 inHg range. These deluxe bourdon gauges are liquid filled inside which dampens the effects of pulsation and pressure spikes, lubricates the gauge’s moving parts so that everyday friction is reduced, and helps prevent internal corrosion among other things. The air bubble is needed in the gauge for dampening the internal pressure for more accurate readings and acts as a cushioning effect. Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org A Bourdon gauge uses a coiled tube, which, as it expands due to pressure increase causes a rotation of an arm connected to the tube.The pressure sensing element is a closed coiled tube connected to the chamber or pipe in which pressure is to be sensed. As the gauge pressure increases the tube will tend to uncoil, while a reduced gauge pressure will cause the tube to coil more tightly. This motion is transferred through a linkage to a gear train connected to an indicating needle. The needle is presented in front of a card face inscribed with the pressure indications associated with particular needle deflections. In a barometer, the Bourdon tube is sealed at both ends and the absolute pressure of the ambient atmosphere is sensed. The Bourdon pressure gauge measures pressure relative to atmospheric pressure, that is, they measure pressure directly relative to the surrounding atmospheric pressure.

These deluxe Bourdon needle dial vacuum pressure gauges have a KF-16 inlet vacuum connection and can measure vacuum pressure in the 0 - 30 inHg range. These deluxe bourdon gauges are liquid filled inside which dampens the effects of pulsation and pressure spikes, lubricates the gauge’s moving parts so that everyday friction is reduced, and helps prevent internal corrosion among other things. The air bubble is needed in the gauge for dampening the internal pressure for more accurate readings and acts as a cushioning effect. Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org A Bourdon gauge uses a coiled tube, which, as it expands due to pressure increase causes a rotation of an arm connected to the tube.The pressure sensing element is a closed coiled tube connected to the chamber or pipe in which pressure is to be sensed. As the gauge pressure increases the tube will tend to uncoil, while a reduced gauge pressure will cause the tube to coil more tightly. This motion is transferred through a linkage to a gear train connected to an indicating needle. The needle is presented in front of a card face inscribed with the pressure indications associated with particular needle deflections. In a barometer, the Bourdon tube is sealed at both ends and the absolute pressure of the ambient atmosphere is sensed. The Bourdon pressure gauge measures pressure relative to atmospheric pressure, that is, they measure pressure directly relative to the surrounding atmospheric pressure.

These Leybold Bourdon needle dial vacuum pressure gauges have a KF-16 inlet vacuum connection and can measure vacuum pressure in the 1 to 1020 mbar range. Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org A Bourdon gauge uses a coiled tube, which, as it expands due to pressure increase causes a rotation of an arm connected to the tube.The pressure sensing element is a closed coiled tube connected to the chamber or pipe in which pressure is to be sensed. As the gauge pressure increases the tube will tend to uncoil, while a reduced gauge pressure will cause the tube to coil more tightly. This motion is transferred through a linkage to a gear train connected to an indicating needle. The needle is presented in front of a card face inscribed with the pressure indications associated with particular needle deflections. In a barometer, the Bourdon tube is sealed at both ends and the absolute pressure of the ambient atmosphere is sensed. The Bourdon pressure gauge measures pressure relative to atmospheric pressure, that is, they measure pressure directly relative to the surrounding atmospheric pressure.

These deluxe Bourdon needle dial vacuum pressure gauges have a KF25 inlet vacuum connection and can measure vacuum pressure in the 0 - 30 inHg range. These deluxe bourdon gauges are liquid filled inside which dampens the effects of pulsation and pressure spikes, lubricates the gauge’s moving parts so that everyday friction is reduced, and helps prevent internal corrosion among other things. The air bubble is needed in the gauge for dampening the internal pressure for more accurate readings and acts as a cushioning effect. Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org A Bourdon gauge uses a coiled tube, which, as it expands due to pressure increase causes a rotation of an arm connected to the tube.The pressure sensing element is a closed coiled tube connected to the chamber or pipe in which pressure is to be sensed. As the gauge pressure increases the tube will tend to uncoil, while a reduced gauge pressure will cause the tube to coil more tightly. This motion is transferred through a linkage to a gear train connected to an indicating needle. The needle is presented in front of a card face inscribed with the pressure indications associated with particular needle deflections. In a barometer, the Bourdon tube is sealed at both ends and the absolute pressure of the ambient atmosphere is sensed. The Bourdon pressure gauge measures pressure relative to atmospheric pressure, that is, they measure pressure directly relative to the surrounding atmospheric pressure.

These deluxe Bourdon needle dial vacuum pressure gauges have a KF40 inlet vacuum connection and can measure vacuum pressure in the 0 - 30 inHg range. These deluxe bourdon gauges are liquid filled inside which dampens the effects of pulsation and pressure spikes, lubricates the gauge’s moving parts so that everyday friction is reduced, and helps prevent internal corrosion among other things. The air bubble is needed in the gauge for dampening the internal pressure for more accurate readings and acts as a cushioning effect. Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org A Bourdon gauge uses a coiled tube, which, as it expands due to pressure increase causes a rotation of an arm connected to the tube.The pressure sensing element is a closed coiled tube connected to the chamber or pipe in which pressure is to be sensed. As the gauge pressure increases the tube will tend to uncoil, while a reduced gauge pressure will cause the tube to coil more tightly. This motion is transferred through a linkage to a gear train connected to an indicating needle. The needle is presented in front of a card face inscribed with the pressure indications associated with particular needle deflections. In a barometer, the Bourdon tube is sealed at both ends and the absolute pressure of the ambient atmosphere is sensed. The Bourdon pressure gauge measures pressure relative to atmospheric pressure, that is, they measure pressure directly relative to the surrounding atmospheric pressure.

These deluxe Bourdon needle dial vacuum pressure gauges have a KF50 inlet vacuum connection and can measure vacuum pressure in the 0 - 30 inHg range. These deluxe bourdon gauges are liquid filled inside which dampens the effects of pulsation and pressure spikes, lubricates the gauge’s moving parts so that everyday friction is reduced, and helps prevent internal corrosion among other things. The air bubble is needed in the gauge for dampening the internal pressure for more accurate readings and acts as a cushioning effect. Bourdon Dial Needle Vacuum Pressure Measurement Gauges, by Wikipedia.org A Bourdon gauge uses a coiled tube, which, as it expands due to pressure increase causes a rotation of an arm connected to the tube.The pressure sensing element is a closed coiled tube connected to the chamber or pipe in which pressure is to be sensed. As the gauge pressure increases the tube will tend to uncoil, while a reduced gauge pressure will cause the tube to coil more tightly. This motion is transferred through a linkage to a gear train connected to an indicating needle. The needle is presented in front of a card face inscribed with the pressure indications associated with particular needle deflections. In a barometer, the Bourdon tube is sealed at both ends and the absolute pressure of the ambient atmosphere is sensed. The Bourdon pressure gauge measures pressure relative to atmospheric pressure, that is, they measure pressure directly relative to the surrounding atmospheric pressure.