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Radius® BZ1 Area Monitor

When it comes to choosing equipment to protect your worksite from hazardous gases, rely on the Radius® BZ1 Area Monitor. No other area monitor protects your workers longer in the field with less setup, user training, and time in the shop.


  1. Detect up to seven gases using 18 sensor options including PID
  2. Longest running area monitor with a typical run time of 7 days (168 hours)
  3. Audible alarms sound at 108 dB at 1 m to cut through high-noise environments
  4. LENS™ Wireless enables communication between area monitors and Ventis® Pro Series personal monitors
  5. Largest display of any area monitor on the market
  6. Customizable alarm action messages such as “EVACUATE” or “VENTILATE”
  7. DualSense® Technology increases worker safety by using two sensors to detect the same gas
  8. iNet ® and DSX™ Docking Station ready



Radius just works, no questions asked, so your teams can focus on what’s important and be confident that their area monitors are ready for whatever comes their way.

Deploy Whenever and Wherever: Whether setting up a perimeter, or monitoring gas leaks or confined spaces, the Radius BZ1 allows for flexible deployments to create buffers between workers and gas hazards.

Get the Message Loud and Clear: Loud audible alarms and different colored strobes for gas and non-gas events ensure workers not only know when the instrument is alarming, but why.

React With Confidence: Identify gases and alarms from a safe distance, and read critical safety messages such as “EVACUATE” or “VENTILATE,” thanks to a display that is three times larger than its nearest competitors’.

Know What is Happening Without Approaching: Create wireless networks out of the box and receive real-time gas readings from other instruments, including Ventis Pro Series personal monitors, thanks to LENS Wireless and its automatic, peer-to-peer mesh network.

Spend Less Time Managing Your Instruments: Your gas detection instruments will spend more time in the field and less time in the shop thanks to a unique modular design, the DSX™ Docking Station, and patented DualSense Technology .


LENS Wireless  is the first gas detection solution that allows personal monitors and area monitors to share gas readings and alarms with one another. Now when a gas hazard, man-down, or panic situation causes an instrument to alarm, all peers in the connected group will instantly be notified of the hazard and the person in danger. When seconds matter, you can rely on help from workers nearby, rather a call center hundreds of miles away.

DualSense Technology uses redundant sensors to determine the concentration of the target gas in the atmosphere and reduce the risk of instrument failure. Two sensors of the same type in one gas detector help to give you the most accurate gas reading.

Common Configurations

Radius BZ1 – LEL (Pentane), CO, H2S, O2   BZ1-K123000x0y
Radius BZ1 – LEL (Pentane), CO, H2S, O2    ✔   BZ1-K123000x1y
Radius BZ1 – LEL (Pentane), CO, H2S, O2    ✔   BZ1-K123001x0y
Radius BZ1 – LEL (Pentane), CO, H2S, O2    ✔    ✔   BZ1-K123001x1y
Radius BZ1 – LEL (Pentane), CO, H2S, O2, SO2   BZ1-K123500x0y
Radius BZ1 – LEL (Pentane), CO, H2S, O2, SO2    ✔   BZ1-K123500x1y
Radius BZ1 – LEL (Pentane), CO, H2S, O2, SO2    ✔   BZ1-K123501x0y
Radius BZ1 – LEL (Pentane), CO, H2S, O2, SO2    ✔    ✔   BZ1-K123501x1y
Radius BZ1 – LEL (Pentane), CO, H2S, O2, SO2, PID   BZ1-K1235R0x0y
Radius BZ1 – LEL (Pentane), CO, H2S, O2, SO2, PID    ✔   BZ1-K1235R0x1y
Radius BZ1 – LEL (Pentane), CO, H2S, O2, SO2, PID    ✔   BZ1-K1235R1x0y
Radius BZ1 – LEL (Pentane), CO, H2S, O2, SO2, PID    ✔    ✔   BZ1-K1235R1x1y
x = Agency Certification: 1 = UL/CSA, 2 = ATEX/IECEx | y = Language: 1 = EN, 2 = FR, 3 = ES, 4 = DE



Radius BZ1 Base (Without SafeCore)
A = Approvals, where 1 = UL/CSA, 2=ATEX/IECEx
B = Language, where 1 = English, 2 = French, 3 = Spanish, 4 = German
Intrinsically Safe Extended Run Time Power Supply (CSA)
Extended Run Time Power Supply
A = Power Cord, where 1 = North America, 2 = Europe, 3 = Australia, 4 = UK
50 m Replacement Intrinsic Safety Cable
Intrinsic Safety Power Port Dust Cap
Speaker Grill
Speaker Dust Filter (Pack of 2)
Alarm Muffler (Pack of 2)
Charging Power Supply (Without Power Cord)
Power Cord (North America)
Power Cord (Europe)
Power Cord (Australia)
Power Cord (UK)
Calibration Cup and Tubing Kit
Charging Port Dust Cap
Printed Manual
A = Language, where 1 = English, 2 = French, 3 = Spanish, 4 = German