Safely and accurately monitor your sodium hydroxide storage tanks with Krueger Sentry Gauge’s corrosion-resistant, all-plastic liquid level indicators. Engineered specifically for sodium hydroxide (caustic soda), our gauges deliver precise level monitoring for both bulk tanks and drums. Manufactured in the U.S. from chemically compatible materials, they enhance safety, accuracy, and regulatory compliance in high-pH environments.
The Challenge: Metal and Glass Gauges Fail in Caustic Soda Environments
Sodium hydroxide’s strong alkaline nature presents significant challenges for storage systems. Conventional metal gauges—such as those made from stainless steel—quickly corrode when in contact with NaOH, leading to leaks, mechanical failures, and operational interruptions. Corrosion not only shortens the service life of the gauge but also increases the risk of uncontrolled chemical release and unplanned downtime.
Glass sight gauges resist chemical attack but are still a weak point in sodium hydroxide service due to their fragility. In active industrial settings, a single impact can shatter a glass tube, resulting in a hazardous spill and exposing personnel to dangerous caustic material.
Facilities that use double-wall tanks or tank risers for sodium hydroxide storage often find that standard gauge models cannot adapt to these configurations, leaving operators without a reliable means of tracking inventory. This gap in monitoring capability can create compliance issues and compromise safety.
The Solution: Krueger Sentry’s All-Plastic Sodium Hydroxide Gauges
Krueger Sentry Gauge solves these challenges with specialized, all-plastic liquid level indicators built for sodium hydroxide applications. All components that contact NaOH—support rods, bushings, threaded fittings, and floats—are crafted from chemically inert plastics. These materials resist strong bases, maintaining integrity over years of service.
Our At-A-Glance® mechanical float-and-rod design delivers immediate, accurate level readings without requiring power. The top-mounted visual indicator prevents the need to open the tank, and its simple mechanics reduce potential failure points. Maintenance requirements are minimal, significantly reducing long-term costs.
Manufactured domestically, every gauge is customized to fit your storage configuration. The gauge fits tanks up to 110 inches deep, and can be configured to accommodate double-wall tanks and pipe risers. They integrate smoothly with standard NPT tank openings, ensuring streamlined installation.
Models and Technical Specifications: PD for Tanks and PB for Drums
For larger storage setups, the Type PD gauge delivers reliable, direct-reading level monitoring. Designed for bulk sodium hydroxide tanks up to 110 inches deep, it also adapts to complex configurations like secondary containment and tall risers.
For drum-scale storage, the Type PB gauge is tailored to standard 55-, 30-, and 15-gallon drums. It installs into the drum’s bung and uses the same all-plastic design to resist NaOH corrosion while providing clear level visibility. This model eliminates the need for manual gauging or exposure to caustic chemical vapors.
Both models share straightforward design and durability. Optional accessories—such as remote level alarms or digital integration—can be added, but the core functionality remains robust and maintenance-free.
Plastic Gauges Outperform Traditional Alternatives in Caustic Applications
Plastic gauges significantly outperform stainless steel or glass alternatives in sodium hydroxide environments. Stainless steel corrodes under strong alkali exposure, whereas plastics like PVC, PEEK, and HDPE remain stable and undamaged.
Glass sight tubes, while chemically inert, are prone to breaking and causing hazardous leaks. Krueger Sentry’s gauges are internally located, housed within sturdy plastic enclosures that eliminate breakage risks and minimize leak pathways.
Plastics also afford long service life and greatly reduced maintenance compared to metal or glass units. Investing in our corrosion-resistant gauges improves safety and minimizes total cost of ownership.
Safety, Compliance, and Operational Reliability
Krueger Sentry’s sodium hydroxide gauges support adherence to strict safety and environmental standards. Regulations often mandate accurate monitoring, chemical compatibility, and provisions for secondary containment. Our gauges integrate with double-wall tank systems and support vented or closed systems to control vapors and emissions.
Industry guidelines endorse the use of plastics for handling strong bases like NaOH. Our material choices align with these standards, eliminating uncertainties around compatibility and simplifying audits and inspections.
Facility managers benefit from enhanced safety and streamlined operations. Engineers appreciate the easy integration with plastic storage systems. Procurement teams gain from reliable, American-made gauges with low lifecycle costs.
Upgrade Your Sodium Hydroxide Storage Safety Today
Sodium hydroxide demands robust, compatible monitoring solutions. Krueger Sentry’s all-plastic liquid level gauges deliver precision, durability, and compliance tailored to caustic applications. Don’t risk safety or accuracy with corrodible or fragile gauges. Contact Krueger Sentry Gauge today for your customized, corrosion-resistant gauge solutions, and elevate your sodium hydroxide storage safety standards.
We also have solutions for: Sulphuric Acid Tank Level Gauges , Potassium Hydroxide (KOH) Tank Level Gauges, Bleach Storage Level Gauges, Chlorine Storage Level Gauges and Hydrochloric Acid Tank Level Gauges.
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.
