The 6 Best Nitrogen Flow Meters

This wiki has been updated 28 times since it was first published in November of 2018. If your work requires you to use nitrogen, having a flow meter installed on your tank is a great way to save some money. These indicators let you know whether gas is moving through the line, often via the use of a levitating ball, a pressure gauge, or other visual cue. These options are simple to use and reliable, making them must-haves for welders, HVAC technicians, and more. When users buy our independently chosen editorial choices, we may earn commissions to help fund the Wiki.

1. Betooll HW9003

The Betooll HW9003 (appx. $25) includes an adapter that allows it to work with both male and female fittings. This makes it compatible with a wide range of tanks, so it's a smart choice for busy shops that might encounter either on a regular basis.

Lack of diaphragm boosts accuracy
Adjustable output flow
Gauge goes up to 4000 psi

2. Western Enterprises VN-500

The Western Enterprises VN-500 (appx. $130) is a hybrid model, with a regulator in addition to the flow meter. It's basically a large chunk of brass, making it perfect for heavy-duty use in the field, since it's more than capable of standing up to everyday abuse.

Preset flow rates
Easy to swap out from tank to tank
Doesn't require any adapters

3. Uniweld UNF3

The Uniweld UNF3 (around $51) is good for anyone worried about wasting expensive gas. The internal ball floats even when very little pressure is applied, so you won't have to bleed off much of your tank when you're just trying to purge a line.

Ideal for copper brazing
Safety relief rupture disk
Scale is easy to read

4. ESAB Turbo Torch

Despite its aggressive-sounding name, the ESAB Turbo Torch (around $48) enables you to wield precise control over your fuel levels. This makes it easy to braze without allowing oxidation or accidentally blowing pinholes in the joint you're soldering.

Allows outflow of up to 75 scfh
Compatible with most regulators
Provides consistent flow

5. Uniweld NV1 NitroVue

The Uniweld NV1 NitroVue (around $46) uses a bright orange float ball instead of the black version commonly seen in other models. This helps you quickly determine the flow level while reducing the likelihood that you might make a mistake in doing so.

Blow-off opens if pressure too high
Compact and easy to store
Needs to be positioned vertically

6. Victor Technologies Light Duty

The versatile Victor Technologies Light Duty (appx. $101) is compatible with argon and helium in addition to nitrogen, so it should be able to find a spot in your shop regardless of which gas tanks you happen to have up and running at the time.

Generous ten-foot hose
Perfect for tig welding
On the expensive side

Last updated by Quincy Miller

After getting his bachelor’s from the University of Texas, Quincy Miller moved out to Los Angeles, where he soon found work as a copywriter and researcher, specializing in health and wellness topics for a major online media brand. Quincy is also knowledgeable about home improvement, as he’s had extensive experience with everything from insulation to power tools to emergency room trips, sometimes in that order. Sharing a home with three dogs and a couple of cats has forced Quincy to learn as much as he can about pet supplies, animal nutrition and, most importantly, the best ways to tackle the mountains of fur that accumulate in every corner of your home.

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