Industrial Scientific Radius BZ1 Area Gas Monitor

24/7 Hassle Free Wireless Area Gas Detection Monitoring For Up To 7 Gases.


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.

Stop worrying about missing alarms. Stop stressing over equipment downtime. The Radius™ BZ1 is built to detect gas hazards 24/7 without the hassle of elaborate wireless setups and maintenance routines. 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 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 coloured 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 thanks to LENS Wireless and its automatic, peer-to-peer mesh network.
Spend Less Time Managing Your Instruments:
Your 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.

For more information on the Industrial Scientific Radius BZ1 Area Gas Monitor, contact your local Air-Met office. 

Features of the Radius BZ1

  • Detect up to seven gases using 18 sensor options including PID
  • Longest running area monitor with a typical run time of 7 days (168 hours)
  • Audible alarms sound at 108 dB at 1 m to cut through high-noise environments
  • LENS™ Wireless networks share alarms and data with no setup or infrastructure
  • Largest display of any area monitor on the market
  • Customisable alarm action messages such as "EVACUATE" or "VENTILATE"
  • DualSense ® Technology increases worker safety by using two sensors to detect the same gas
  • iNet ® and DSX™ Docking Station ready

Features of the LENS Wireless Highlights include:   

  • No infrastructure required
  • Out-of-the-box operation
  • No need for IT setup
  • Self-forming, self-healing networks
  • Long range communication up to 300m without sacrificing runtime
  • Peer readings display alarms and data from across the linked group
  1. Confined Space Monitoring
    Know what’s happening in a confined space by using the pumped SafeCore Module and tubing to draw air samples to the monitor.
  2. Perimeter Monitoring 
    Set up monitors around a tank, hot work, or other known hazardous areas to continuously monitor for gas leaks.
  3. Fence Line Monitoring
    Create a barrier between a safe zone and hazardous work area. Use the hopping capability of LENS Wireless to know what is happening up to 1.5 km away.
Radius BZ1 Specifications
Measuring Ranges CATALYTIC BEAD
Combustible Gases:
0-100% LEL in 1% increments
Carbon Monoxide (CO):
Carbon Monoxide (CO High Range):
Carbon Monoxide (CO/H2 Low):
Carbon Monoxide/Hydrogen Sulfide:

Chlorine (CL2): 
Hydrogen (H2): 
Hydrogen Sulfide (H2S): 
Hydrogen Cyanide (HCN):
Nitrogen Dioxide (NO2):
Oxygen (O2): 
Sulfur Dioxide (SO2): 

0-500 ppm in 1 ppm increment
0-1,500 ppm in 1 ppm increments
0-9,999 ppm in 1 ppm increments
0-1,000 ppm in 1 ppm increments
CO: 0-1,500 ppm in 1 ppm increments
H2S: 0-500 ppm in 0.1 ppm increments
0-50 ppm in 0.1 ppm increments
0-2,000 ppm in 1 ppm increments
0-500 ppm in 0.1 ppm increments
0.4-30 ppm in 0.1 ppm increments
0.4-30 ppm in 0.1 ppm increments
0-150 ppm in 0.1 ppm increments
0-30% vol in 0.1% increments
0-150 ppm in 0.1 ppm increments
Volatile Organic Compounds (10.6eV):

0-2,000 ppm in 0.1 ppm increments
Pump Optional integral pump, up to 30.48 m (100 ft) sample draw
Wireless (Optional LENS™ Wireless, proprietary mesh network)
Max Peers: 
ISM license-free band (2.4 GHz)
25 devices per network group
10 independent, configurable network groups
300 m (~1,000 ft) line of sight
FCC Part 15, Others (see Industrial Scientific website for more details)
UL: Class I, Division 1, Groups A, B, C, and D; T4
Class 1 Zone 0 AEx da ia IIC T4 Ga1
CSA: Class I, Division 1, Groups A, B, C, and D; T4
C22.2 No. 152 applies only to %LEL thermo-catalytic reading
ATEX: Ex da ia IIC T4 Ga, Equipment Group and Category II 1G
IECEx: Ex da ia IIC T4 Ga
Data Log At least 3 months at 10-second intervals
Event Logging 60 alarm events
Ingress Protection IP66
Case Material Impact-resistant polycarbonate alloys
Dimensions 29 x 29 x 55 cm
Weight 7.5 kg
Temperature Range -20 °C to 55 °C (-4 °F to 131 °F)
Humidity Range 15%-95% non-condensing (continuous)
Power Source/Run Time (Rechargeable nickel-metal hydride (NiMH) battery pack)
7 days (168 hours) typical @ 20 ºC, without pump, with wireless
3.5 days (84 hours) typical @ 20 ºC, with pump, with wireless
30 days (720 hours) typical @ 20 ºC, electrochemical sensors only, without pump, with wireless
≤8 hour recharge time
108 decibel (dB) at 1 m (3.3 ft) redundant audible alarms
Redundant, visual alarm LEDs (red and blue)
Up to 6 sensors (catalytic bead, photoionisation detector, and electrochemical)
Up to 7 simultaneous readings


  • Perimeter monitoring
  • Gas leak monitoring
  • Confined space monitoring