Krueger Sentry Gauge is a trusted leading provider of custom tank gauges. For over 80 years, clients across all major industries have turned to Krueger for high-quality gauge monitors, liquid-level gauges, configurators, and more.
Our engineering teams have produced over 4 million gauges for myriad industrial applications. All of our gauges are American-made, with components produced in-house or by Krueger’s trusted domestic partners.
Gauge Materials
Krueger gauges can be used with a wide range of petroleum-based fluids and non-aggressive chemicals, such as hydraulic oil, diesel or gasoline, and transmission fluid. To guarantee long-lasting performance, we use the following American-made materials:
- Aluminum bushings
- Galvanized steel wetted rods
- HDPE plastic floats or nitrophyl floats
Gauge Types Offered
Choose from our five standard classes of gauges to find or develop the right equipment for your team’s applications.
Stainless Rods (S1)
S1 stainless steel rods are built to withstand exposure to mildly aggressive liquids, including citric acid, methanol, and windshield washer fluid. These steel rods offer good corrosion resistance in standard applications.
The Stainless Level 2 (S2)
S2-level stainless gauges are built from stainless floats, stainless rods, and aluminum bushing. This means every wetted component, or components that make regular contact with fluid, are built to resist corrosion. As a result, these gauges can withstand exposure to the following types of fluids:
- Acetone
- Ammonia
- Antifreeze
- Biodiesels
- Jet fuel
- Kerosene
- Nitric acid
- Paint resin
- Waste oil
The Stainless Level 3 (S3)
For longer-lasting protection, choose from our level 3 gauges. We offer both fully stainless metal options and all-plastic gauges for environments with fluids that react to any metal presence. S3 gauges are compatible with the above fluids, as well as:
- Caustic fluids
- Ethanol
- Peroxides
- Potassium hydroxide
- Sodium hydroxide
- Concentrated (93+) sulfuric acid
- UREA/DEF
PEEK Plastic Gauges
Polyether ether ketone (PEEK) plastic gauges are specially developed for use in acidic environments that can damage metal. Each gauge has HDPE floats, a PVC bushing, and a PEEK body. Because of their unique material construction, plastic gauges work well in applications where bleach, ferric chloride, hydrochloric acid, and phosphoric acid may be present.
Kynar® Plastic Gauges
Kynar® plastic gauges have HDPE floats, a PVC busing, and a plastic body. Kynar® plastic gauges cannot be constructed to reach the same tank depths as other materials and have a maximum reach of 76 inches. However, they are compatible with chlorine, non-concentrated sulfuric acid, and other chemically harsh fluids.
Why Us
Companies choose Krueger Sentry Gauge because of our commitment to using high-quality materials and providing custom solutions. We create versatile, durable products that perform in even the difficult commercial and industrial projects. We bring value to customers across industries by building the following into our services and offerings:
Optionality
Clients can choose from a wide range of material options, starting with our standard plastic tops. We provide different types and options to handle different environmental stresses such as physical damage, sun exposure, and extreme temperatures.
Versatility
Choose from versatile options like our plastic tops with glass liners. The glass liner increases resistance to heat and UV damage, internal fumes from nearby fluids, and other environmental damage.
Solid Glass Calibration
Our solid glass calibration (SGC) options are built for outdoor applications. This process ensures the longest possible calibration without adverse effects from fumes, UV radiation, heat, and the elements.
Custom Tank Gauges for a Variety of Industries by Krueger
Choose custom tank gauges you can rely on from Krueger. Our gauge monitors are highly versatile, and we can work with your team to develop the right tools for your unique needs.
Contact us today to learn more about our custom gauges, gauge monitors, and other products.
Frequently Asked Questions
Got questions? Get answers instantly by browsing our FAQs below, chatting with our AI assistant, or reaching our to our team directly.
What do we use as a part number?
At Krueger Sentry, we don’t use classic part numbers. Everything is description-based. Refer to your product’s Spec Page (materials options) and the Order Info (tank measurements) page for more information. Example Part Number: – H-2-48 + 12 w/glass (H signifies the type of gauge, 2 is the size opening, 48 is the tank depth, 12 is the extension, and everything after that is the options you want to be included.
Which liquid level monitor is the right choice for me?
When choosing a liquid level gauge, different factors can change which sight gauge is best for you. The basic factors that motivate people to buy each type of gauge are as follows.
- Economical sight gauge- At-A-Glance Direct Reading
- Versatile sight gauge- Therma Gauge
- Small tank monitor, under 12 inches – The L Gauge
- Standard Barrel Level Gauges – Barrel Gauge
- Up to 12 feet of mechanical remote capability – Remote Reading Gauge
- Durability – GFK Gauge – you can achieve this durability by ordering a therma gauge with a gauge guard as well.
How do I find or locate a Krueger Sentry Gauge distributor?
Search our Preferred Distributor Page. Don’t see a distributor you want to use? Call me. Lee Geurts: 920-434-8860 ext 204
Which sight gauge do you recommend most often to your customers?
I try to sell the Therma gauge to most people. It is nearly as inexpensive as the At A Glance Gauge, but you have more control over your swing arm. Plus, this level gauge can be fitted with the most options.
What is the difference between the Type D At a Glance Level Gauge and the Type H Therma Level Gauge?
The Swing arm on the Type D Gauge is fixed. When you thread in the gauge, the swing arm spins inside the tank and will end up facing in a random direction. The swing arm on the Type H Gauge can be aimed in the exact direction you want it to swing, and when you thread the gauge in it does not spin inside the tank.
How long is the swing arm on a level gauge?
The arm is always half the depth of your tank.
How do I order a custom-size level gauge?
In order to get an accurate gauge for your tank, we take two measurements into consideration. First, we measure, in inches from top to bottom, what the distance is from empty to full, known as tank depth. Second, the distance from the full mark to the gauge fitting on top is also known as an extension length. Sometimes this measurement comes out to zero.
How do I prevent my tank gauge from getting damaged by the sun and weather?
Ordering upgraded options such as Solid Glass Tops and Gauge Guards will make your Krueger Gauge nearly impervious to weather, sun, and damage.
Can I repair just the top of my Tank Gauge, or do I need to replace the whole thing?
If your gauge still seems functional, you can replace just the top components by ordering the corresponding repair kit. Repair Kits are available for all gauge types and come in a variety of material options for added durability, which can be found in the Tank Gauge Accessories.
What is the recommended maintenance/testing for Krueger Leak Gauges?
Krueger Sentry provides a Leak Gauge Functionality / Calibration Testing Report with inspection procedures for inspectors/technicians. Please contact us with any questions.
