4 Reasons Field Techs Choose the NitroPak Pressure Source for Easier Field Calibration
November 27, 2025
Field calibration rarely takes place in a controlled environment. You’re climbing structures, hiking between sites, dodging weather, and carrying bulky gear.
Once you arrive at each test site, you might be dealing with inconsistent pressure sources, loose fittings, or setups that take longer than they should. These challenges add up quickly on days with multiple stops.
These day-to-day realities are exactly why you look for tools that make your work smoother and more efficient. And it’s why Ralston focuses on going Beyond Measurement™ by designing tools that help you get the job done so you can get home on time.
How the NitroPak Meets the Real Needs of Field Technicians
The Ralston NPAK NitroPak Calibration System is built around the realities of field work, giving you a reliable, portable pressure source that keeps the day moving without adding extra steps, gear, or setup time.
Instead of juggling pumps, gas cylinders, fittings, and loose tools, the NitroPak brings the essentials together in one self-contained unit that’s easy to carry anywhere the job takes you.
The NitroPak combines:
- A portable, refillable nitrogen source
- Precise pressure control you’d expect from a benchtop controller
- Built-in storage for hoses, adapters, and a reference gauge
Bringing these elements together reduces the small frustrations that can slow down a full day of field calibration and allows you to stay focused on the work, not the equipment.
Because the NitroPak is part of the broader Ralston Quick-test™ System, it also works with the same fingertight, no-thread-tape connections you already rely on across your other Ralston tools.
And although nitrogen is the most common choice, the cylinder can be filled with any clean, dry inert compressed gas, giving you flexibility across different applications and sites.
Here are four key ways the NitroPak helps simplify field pressure calibration.
1. Precise Pressure Control
Generating stable, accurate pressure out in the field can be a challenge, especially when pumping by hand.
The NitroPak solves that by combining onboard gas with precise, repeatable control of your pressure source.
The pressure-balanced fine-adjust piston allows fingertip control, whether you’re dialing in a low test point at 0.0005 psi (3.5 Pa) or working near the top of the system’s 3,000 psi (210 bar) range.
Because the piston is balanced on both sides, adjustments stay smooth even when system pressure climbs.
With the onboard pressure regulator and the ability to isolate static pressure, it’s easy to hit each test point cleanly and repeatably.
The NitroPak also works seamlessly with Ralston pressure references like the FieldLab Pressure Calibrator or the Field Gauge LC20 for a complete, reliable setup in the field.
It also works with other industry-standard reference gauges, so you can use the reference that fits your workflow and equipment setup.
2. Portable Calibration for Remote and Hazardous Locations
When your work takes you to remote sites, up towers, or into classified environments, portability matters just as much as performance.
The NitroPak’s internal cylinder is certified for transport in the U.S., Canada, and the EU, allowing you to safely carry enough compressed gas for multiple calibrations without hauling a separate nitrogen bottle.
The ABS case is easy to carry by hand, and the entire system is self-contained — a major advantage when the jobsite is far from the truck.
Because the NitroPak contains no electronics, it’s safe to use in North American Class I, Division 1 & 2 and ATEX/IECEx Zone 0, 1, or 2 hazardous locations.
When a certified reference is required in these areas, pair it with the intrinsically safe FieldLab Pressure Calibrator for a fully safe field calibration setup.
3. Fast, Reliable Connections with Ralston Quick-Test™
Moving between multiple test sites throughout the day means your connections need to be quick and reliable.
Every inlet and outlet port on the NitroPak uses Ralston’s Quick-test™ connections. That means:
- No thread tape or thread sealant
- No wrenches
- Secure, leak-free connections in seconds
It’s a simple way to reduce setup time, avoid common leak points, and keep your workflow moving across a busy day in the field.
4. Built to Last in Real-World Conditions
A tool that spends its life in the field needs more than good pressure control; it needs to hold up.
The NitroPak’s high-impact ABS case shields the internal components from drops, vibration, and the day-to-day bumps of field work.
Inside, aluminum and stainless steel parts resist corrosion and temperature swings, while the carbon fiber internal cylinder keeps the system lightweight without sacrificing strength.
And when the workday winds down, your hoses, adapters, and reference gauge all stay secure and organized inside the lid, ready for the next job.
A Durable, Field-Ready System That Supports Accurate Work
Whether you’re a field technician, instrumentation engineer, or a purchasing manager planning for next year, choosing a pressure source for calibration you can count on makes a real difference in day-to-day work.
The NitroPak is built for long days, demanding environments, and the kind of field conditions that don’t always go according to plan.
With onboard compressed gas, precise pressure control, a rugged design, and seamless Quick-test compatibility, it’s a dependable, easy-to-use solution for anyone who performs pressure calibrations in remote or challenging locations.
It’s one of those tools that earns its place in your truck and stays there for years.
See the NitroPak in action with this quick video walkthrough of its layout and pressure control workflow.
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