Helium Leak Detectors- Hydrogen Leak Detectors- Refrigerant Leak Detectors-Pressure Decay Leak Testing

Nolek manufactures high quality pressure decay, helium charging systems, recovery systems and leak detection connectors. In addition, Nolek can offer custom testing software and custom leak detection systems.

The connectors for charging leak detection test equipment offers innovative  & long lasting connectors since 1973. we also offer custom conectors.

Sensistor Hydrogen Leak Detector

News Article

Finding Leaks in Refrigeration Systems- Story on How Hill Phoenix moved from helium to hydrogen

Sensistor H2000 Hydrogen Leak Detector

Hydrogen sniffer leak detector. Uses a  5% hydrogen/nitrogen mixture (non-combustible) as the tracer gas. Can detect a leak as low as 5 x 10^-7 atm cc leak. Hydrogen is 1/3 the cost of helium as the tracer gas thus savings for HVAC manufacturing is great. The Sensistor does not require vacuum thus is lower in maintenance than helium sniffers.

Adixen ASM 142

The ASM 142  is the portable helium leak detector for most vacuum and helium sniffing applications. Usable sensitivity is to the 10 -11 atm cc/sec. The ASM 142 is available in both wet and dry configurations.

The Sensistor XRS System is designed for use in field based applications such as detection of leaks in:

Telephone Cables

Gas-Filled Power Cables

Fuel Stations

Gas Pipelines

Heating Systems

Water Pipes

Need a helium leak detector for a week or month? If your need is only temporary then you could be better off renting. We provide top of the line recent helium leak detectors from Leybold or Alcatel shipped to your location.

Rental helium leak detectors rent for $575 per week. Clean up fee is $125 per rental.

Adixen AMG 12 Multi-Gas Refrigerant Leak Detector

The Adixen AMG 12 Multi-Gas Refrigerant leak Detector is designed for HVAC and Refrigeration Sniffing final check. The AMG 12 can find a leak as small as 0.01 oz/yr. Sensors can be provided for gases R22, R134A, R404A, R407C, R410A and R600A. With a low cost replacement probe, the AMG 12 represents the best and most cost effective refrigerant leak detector on the market for HVAC, Refrigeration and Automotive applications.

Adixen 182 and 192 Helium Leak Detectors for Production Applications

The 182 Series and 192 Series Adixen Helium Leak Detectors provide large roughing and high vacuum pumping for larger production and integrated helium leak detection applications. High helium pumping speeds make for exceptional response. Dry Models have the ACP Series Dry Roots pump for oil-free and particulate free vacuum leak checking.

Proton Energy Hydrogen Generator

The Proton Hydrogen Generator is a low cost alternative to produce the hydrogen tracer gas used for the Sensistor Hydrogen Leak Detector. Proton is the way to long-term savings on tracer gas. Mixing is done on site with a gas mixed and on-site bulk nitrogen. Return on Investment is months for larger users.

Helium is a superior choice of tracer gas used to find leaks a multitude of reasons. Helium is:

• Non-toxic

• Inert and non-condensable

• Normally not present in the atmosphere at more than trace amounts

• Relatively inexpensive

• Readily passes through leaks due to its small atomic size

• Non-flammable

• Available in various size cylinders

• Available in purities appropriate for medical usage

Many high vacuum process tools of all types require occasional leak checking. This may be part of a preventative maintenance schedule or in the event of an unexpected failure. Downtime in either case must be minimized. A rugged, dependable, fast starting leak detector is essential to maximize up time of production tools. Examples of some of these applications are:

Vacuum process equipment or tools

• Vacuum furnaces

• Vacuum coaters

• Beam lines

• Electron beam and ion beam process equipment

• Analytical Instruments

• Semiconductor process tools

• Laser process equipment

Pressurized systems

• Power Plants

• Underground tanks, cables, and pipes

• High purity gas handling systems

• Bioreactors and fermenters

• Liquid gas manufacturing facilities

• Fuel tanks and bladders

Quality Control of Production Parts and Assemblies

The detection and location of leaks is critical in the production

of many products from individual components, to subassemblies,

to completed systems. In many of these cases,

it is as important to know the size or rate of the leak as it

is the location. Whether quantitative or qualitative testing is

required, our helium leak detectors help assure the leak integrity of

your parts or assemblies. Some examples include:

Leak Detection of evacuated parts and assemblies

• Hermetically sealed electronic packages

• Valves and manifolding

• Feedthroughs/glass-to-metal seals

• Vacuum vessels and systems

Helium Leak Detection of Pressurized parts and assemblies

• Leak Detection of air conditioning and refrigeration assemblies

• Radiators, heat exchangers, and condensers

• Brake, fuel, and hydraulic lines

• Leak Detection in Gas tanks

• Food storage tanks and packaging leak detection

• Body implantable medical devices

• High purity piping

Sniffer Helium Leak Detection

The test object is filled with the search gas or the search

gas/air mixture to which the leak detector is sensitive. The

leak detector is equipped with a sniffer probe, with low

pressure at the probe tip. As the sniffer tip passes suspicious

points on the test object, the search gas coming out of the

leak is sucked in and transferred to the detection system of

the leak detector. After conversion into electrical signals the

leaks are displayed optically and acoustically by the leak

detector.

Hydrogen is becoming the gas of choice for sniffer leak detection. Helium resources are becoming more scarce while demand is increasing. Thus helium prices are on the rise and users are considering hydrogen leak detection equipment like the Sensistor. Hydrogen is about 1/3 the price of helium gas used in leak detection.

Some examples of such applications are:

• Aircraft manufacturing and maintenance

• HVAC and Refrigeration leak testing

• Power generating plants

• Pressurized pipelines

• Bioreactors and fermenters

• Petrochemical plants and refineries

• Underground tanks

• Large condensers or heat exchangers

Hydrogen Leak Detection applications include:

• HVAC Assemblies

• Refrigeration Leak Detection

• Leak Detection of automotive air conditioning components

• Petrochemical Leak Detection

• Aboveground gasoline tanks

• Power Plants leak detection

Other Types of Leak Detection

Acoustic Leak Detection uses sonic or ultrasonic energy that

is generated by a gas as it expands through an orifice. This

method is fairly simple and fast but is only sensitive to 10-3

atm cc/second.

Bubble Testing is a common method of leak detection in industry

today. Bubble Testing can be as simple as pressurizing a part, placing it under

water, and looking for leaks. It can also be done by pressurizing

the part with air, applying a soapy solution, and looking for

bubbles. Bubble Testing is simple and cost effective for locating

large leaks but also has its drawbacks. The test piece gets wet

and may therefore need drying. It also cannot measure total

leakage rates and is only useful for 10-4 atm cc/second leaks and larger.

Example:

Mass Flow Leak Detection is used to as an alternative to pressure decay.

Using the Apex Vacuum Mass Flow Controller leaks can be found as

low a 1 x 10EE -03 mbar l/sec. The test vessel is pressurized to a known pressure.

Using a Apex Pressure Controller, the pressure can be kept at a constant in the supply

gas line. Thus any make up gas would be measured on the Apex Mass Flow

Controller.

Pressure Decay is commonly used in plumbing and many other

industries. Pressure Decay Testing may only involve a compressor and a pressure

gauge, though some systems can be much more complex and

expensive. The sensitivity of the Pressure Decay Testing  method is proportional to

time but generally limited to 10-4 atm cc/second. Another

problem with this method is that fluctuations in temperature degrade the accuracy of the tests.

Halogen Gas Detection is commonly used in the air conditioning

and cooling industry. This technology uses an infrared type

detector to detect the presence of halogen tracer gas. This

requires the test piece to be charged with Halogen, which is

impractical, expensive, and can be an environmental issue