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This 1/8 npt fuel pressure gauge adopts 304 stainless steel shell and glycerin filling shockproof design, with a measuring range of 0-100 PSI (or 0-7 Bar) and a measurement accuracy of +/-1.5. it is specially designed for real-time monitoring of fuel system pressure in high vibration environment.
Measurement accuracy:
± 1.5% full range
Interface specification:
1/8 “NPT thread
Range:
0-100 PSI
Glycerin-filled shockproof technology: The dial is filled with 99.7% high-purity glycerin, which effectively absorbs mechanical vibration generated by engines and industrial equipment, eliminates pointer jitter, and keeps pressure readings stable and clear under extreme vibration environments.
304 stainless steel corrosion-resistant shell: ANSI standard 304 stainless steel shell, with excellent resistance to salt spray and chemical corrosion performance, even in harsh industrial workshop or outdoor exposure environment, the service life can be extended for more than 5 years.
High contrast night vision dial: the 1.5-inch dial adopts white background color with black bold scale, red and blue double color range mark (PSI/Bar), contrast ratio is increased by 40%, ensuring that operators can obtain accurate readings instantly in case of insufficient light or emergency.
Avoid reading deviation caused by aging movement: The internal transmission structure adopts precision brass components. After 10,000 pressure fatigue tests, the wear rate is less than 0.05mm, ensuring linear output in long-term use and avoiding reading deviation caused by aging movement.
Low risk of lens breakage: equipped with 2.5mm thick polycarbonate lens, its impact strength is 200 times that of ordinary glass, effectively preventing the risk of lens breakage caused by accidental impact or sudden pressure change.
Simple installation and low risk of leakage: in strict accordance with ANSI B1.20.1 thread standard, taper pipe thread design produces self-sealing effect through the sealing surface, which is not only simple to install, but also reduces the risk of leakage by 90% compared with ordinary straight threads in high-pressure environment.
| Parameter name | Detailed specifications |
| Product Name | 1/8 NPT Fuel Pressure Gauge |
| Dial diameter | 1.5 inches (approx. 40mm) / 2.0 inches (approx. 50mm) |
| Threaded interface | 1/8″ NPT Male (center back or bottom joint) |
| Measurement range | 0 – 100 PSI / 0 – 7 Bar (optional 0-15 PSI or 0-160 PSI) |
| Shell material | AISI 304 stainless steel (polished/brushed finish) |
| Liquid-wetting material | Copper alloy/Brass |
| Accuracy level | ANSI Grade B (±3/2/3%) or ±1.5% Full Scale |
| Filling liquid | 99.7% Food Grade Glycerin Filled |
| Operating temperature | -20°C to +60°C (-4°F to +140°F) |
| Lens material | Reinforced polycarbonate (PC) |
The 1/8 npt fuel pressure gauge is optimized for high dynamic stress environments in the industrial and automotive sectors. Compared with the common dry (non-oil-filled) pressure gauge on the market, its biggest technical advantage is the “dynamic damping balance system”.
Through the cooperation of high-viscosity glycerin and precision movement, it can filter out more than 95% of high-frequency pulses and Mechanical noise greatly reduces the mechanical wear of the internal movement. In addition, in terms of sealing performance, we have adopted a three-layer structure sealing ring to ensure that under severe temperature fluctuations (-20°C to 60°C), there is still no oil leakage and no liquid leakage, and the reading stability is 35% higher than that of similar general-purpose products.
Eliminate violent shaking of the pointer
Prevention of fuel system leakage risk
The dial is blurred in harsh environments
Maintenance cost of frequent replacement of meter heads
used to monitor the working status of large flow fuel pump and pressure regulating valve. This 1/8 npt fuel pressure gauge can help technicians accurately adjust the fuel pressure to prevent the risk of engine knocking due to lean fuel at high speeds.
fuel line monitoring for standby diesel generator sets. Due to the large vibration of the generator, the oil-filled shock pressure gauge can ensure that the maintenance personnel can obtain stable fuel supply pressure data during regular inspection.
pressure monitoring at both ends of the fuel filter of heavy machinery such as tractors and excavators. Its stainless steel housing can resist farmland corrosion and the extreme environment of the field, is the first choice of durable parts.
wind 2-3 circles of teflon sealing tape (raw material tape) on the interface thread of 1/8 npt fuel pressure gauge, and pay attention to avoid the top of the thread to prevent debris from entering the fuel system.
after installation, please use scissors to cut or gently pick up the black rubber plug on the top of the watch case to release the air pressure generated by the temperature difference in the table to ensure that the pressure reading returns to zero accurately.
use an open-ended wrench to clamp the hexagonal square table below the meter head for tightening. it is strictly prohibited to directly hold the stainless steel shell and rotate and screw it in, so as to avoid damage to the sealing structure of the watch case and oil leakage.
Start the fuel pump and observe for 5 minutes under static and dynamic pressure. Check whether there are signs of oil leakage at the connection, and confirm that the reading fluctuates with the adjustment of the pressure regulating valve before it can be put into long-term use.
Fast Q&A Center. We provide quick answers to your questions.
A: This is completely normal. Bubbles are the expansion space reserved by glycerol due to thermal expansion and contraction. After installation, the air bubbles will not affect the accuracy and shock performance of the meter by opening the breathing plug at the top to release the internal pressure.
A: Yes. Although it is named as a fuel gauge, due to the use of copper alloy liquid receiving parts and stainless steel shell, it is compatible with gasoline, diesel, water, engine oil and other fluid media that are not corrosive to copper alloys.
A: It is not recommended. NPT is American standard taper pipe thread (angle 60 °), while BSPT is British standard taper pipe thread (angle 55 °). Although the dimensions are close, forced screwing can cause thread damage and create serious leakage hazards.
A: Yes. With industrial-grade seal design and glycerin filling, the gauge is specially designed to be fixed on the fuel rail or pressure regulating valve for a long time, and can withstand the high temperature and high vibration environment of the engine compartment.
A: In most cases, internal pressurization caused by changes in ambient air pressure or temperature differences. Just pull the top of the sealing rubber plug “exhaust” balance of internal and external pressure, the pointer will usually automatically return to zero.
A: The product has IP65 protection grade, effectively isolated from dust intrusion, and can resist any direction of water washing, very suitable for use in dusty or wet industrial sites.
This 1/8 npt fuel pressure gauge adopts 304 stainless steel shell and glycerin filling shockproof design, with a measuring range of 0-100 PSI (or 0-7 Bar) and a measurement accuracy of +/-1.5. it is specially designed for real-time monitoring of fuel system pressure in high vibration environment.
Interface specification:
1/8 “NPT thread
Measurement accuracy:
± 1.5% full range
Range:
0-100 PSI
Glycerin-filled shockproof technology: The dial is filled with 99.7% high-purity glycerin, which effectively absorbs mechanical vibration generated by engines and industrial equipment, eliminates pointer jitter, and keeps pressure readings stable and clear under extreme vibration environments.
304 stainless steel corrosion-resistant shell: ANSI standard 304 stainless steel shell, with excellent resistance to salt spray and chemical corrosion performance, even in harsh industrial workshop or outdoor exposure environment, the service life can be extended for more than 5 years.
High contrast night vision dial: the 1.5-inch dial adopts white background color with black bold scale, red and blue double color range mark (PSI/Bar), contrast ratio is increased by 40%, ensuring that operators can obtain accurate readings instantly in case of insufficient light or emergency.
Avoid reading deviation caused by aging movement: The internal transmission structure adopts precision brass components. After 10,000 pressure fatigue tests, the wear rate is less than 0.05mm, ensuring linear output in long-term use and avoiding reading deviation caused by aging movement.
Low risk of lens breakage: equipped with 2.5mm thick polycarbonate lens, its impact strength is 200 times that of ordinary glass, effectively preventing the risk of lens breakage caused by accidental impact or sudden pressure change.
Simple installation and low risk of leakage: in strict accordance with ANSI B1.20.1 thread standard, taper pipe thread design produces self-sealing effect through the sealing surface, which is not only simple to install, but also reduces the risk of leakage by 90% compared with ordinary straight threads in high-pressure environment.
| Parameter name | Detailed specifications |
| Product Name | 1/8 NPT Fuel Pressure Gauge |
| Dial diameter | 1.5 inches (approx. 40mm) / 2.0 inches (approx. 50mm) |
| Threaded interface | 1/8″ NPT Male (center back or bottom joint) |
| Measurement range | 0 – 100 PSI / 0 – 7 Bar (optional 0-15 PSI or 0-160 PSI) |
| Shell material | AISI 304 stainless steel (polished/brushed finish) |
| Liquid-wetting material | Copper alloy/Brass |
| Accuracy level | ANSI Grade B (±3/2/3%) or ±1.5% Full Scale |
| Filling liquid | 99.7% Food Grade Glycerin Filled |
| Operating temperature | -20°C to +60°C (-4°F to +140°F) |
| Lens material | Reinforced polycarbonate (PC) |
The 1/8 npt fuel pressure gauge is optimized for high dynamic stress environments in the industrial and automotive sectors. Compared with the common dry (non-oil-filled) pressure gauge on the market, its biggest technical advantage is the “dynamic damping balance system”.
Through the cooperation of high-viscosity glycerin and precision movement, it can filter out more than 95% of high-frequency pulses and Mechanical noise greatly reduces the mechanical wear of the internal movement. In addition, in terms of sealing performance, we have adopted a three-layer structure sealing ring to ensure that under severe temperature fluctuations (-20°C to 60°C), there is still no oil leakage and no liquid leakage, and the reading stability is 35% higher than that of similar general-purpose products.
Eliminate violent shaking of the pointer
Prevention of fuel system leakage risk
The dial is blurred in harsh environments
Maintenance cost of frequent replacement of meter heads
used to monitor the working status of large flow fuel pump and pressure regulating valve. This 1/8 npt fuel pressure gauge can help technicians accurately adjust the fuel pressure to prevent the risk of engine knocking due to lean fuel at high speeds.
fuel line monitoring for standby diesel generator sets. Due to the large vibration of the generator, the oil-filled shock pressure gauge can ensure that the maintenance personnel can obtain stable fuel supply pressure data during regular inspection.
pressure monitoring at both ends of the fuel filter of heavy machinery such as tractors and excavators. Its stainless steel housing can resist farmland corrosion and the extreme environment of the field, is the first choice of durable parts.
wind 2-3 circles of teflon sealing tape (raw material tape) on the interface thread of 1/8 npt fuel pressure gauge, and pay attention to avoid the top of the thread to prevent debris from entering the fuel system.
after installation, please use scissors to cut or gently pick up the black rubber plug on the top of the watch case to release the air pressure generated by the temperature difference in the table to ensure that the pressure reading returns to zero accurately.
use an open-ended wrench to clamp the hexagonal square table below the meter head for tightening. it is strictly prohibited to directly hold the stainless steel shell and rotate and screw it in, so as to avoid damage to the sealing structure of the watch case and oil leakage.
Start the fuel pump and observe for 5 minutes under static and dynamic pressure. Check whether there are signs of oil leakage at the connection, and confirm that the reading fluctuates with the adjustment of the pressure regulating valve before it can be put into long-term use.
Fast Q&A Center. We provide quick answers to your questions.
A: This is completely normal. Bubbles are the expansion space reserved by glycerol due to thermal expansion and contraction. After installation, the air bubbles will not affect the accuracy and shock performance of the meter by opening the breathing plug at the top to release the internal pressure.
A: Yes. Although it is named as a fuel gauge, due to the use of copper alloy liquid receiving parts and stainless steel shell, it is compatible with gasoline, diesel, water, engine oil and other fluid media that are not corrosive to copper alloys.
A: It is not recommended. NPT is American standard taper pipe thread (angle 60 °), while BSPT is British standard taper pipe thread (angle 55 °). Although the dimensions are close, forced screwing can cause thread damage and create serious leakage hazards.
A: Yes. With industrial-grade seal design and glycerin filling, the gauge is specially designed to be fixed on the fuel rail or pressure regulating valve for a long time, and can withstand the high temperature and high vibration environment of the engine compartment.
A: In most cases, internal pressurization caused by changes in ambient air pressure or temperature differences. Just pull the top of the sealing rubber plug “exhaust” balance of internal and external pressure, the pointer will usually automatically return to zero.
A: The product has IP65 protection grade, effectively isolated from dust intrusion, and can resist any direction of water washing, very suitable for use in dusty or wet industrial sites.