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The RPB® GX4 is an intelligent gas monitor that has the ability to detect up to 4 gases simultaneously, giving you assurance that the air you and your employees are breathing is safe.



The most intelligent gas detection monitor on the market

View your air quality from any device. Connect the GX4™ from your laptop, tablet, phone or
via a network.

All sensors are displayed on the home page in
real time. You also have the ability to download
logs and much more.


Real time monitoring
for early detection

While low level exposure may not be immediately fatal, ongoing contact at low levels has a cumulative effect, causing serious illness and long-term health concerns. Early symptoms can be mistaken for the flu, headaches or tiredness. It is a serious problem for operators and businesses alike and is commonly overlooked.

Gas Sensors

Last up to 2 years

Versatile Mounting

Your GX4® can be mounted to
a Radex™ Airline Filter, GX4® carry case or to the wall.

Robust Power &
Push Release Air Inlets

Power Options

Explore the GX4 Gas Monitor

Customer Reviews

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Let's Get Technical



GX4 Gas Monitor Brochure (English)

GX4 Gas Monitor Instruction Manual (English)

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Guaranteed 2-hour response time*

Free Racing Cap

To receive your free RPB Safety racing cap, simply complete the form (on your right).
  • *During business hours (U.S. Eastern Time)