Radius BZ1

General Information

The Radius® BZ1 Area Monitor is a rugged gas detector that connects your entire worksite. Designed to go where the work is, Radius can be deployed in seconds for emergency response scenarios or left in the field for up to 7 days on a single charge or for an unlimited period with the Solar Power Supply. Radius shares readings and alarms with other units and personal gas monitors through LENS® Wireless allowing you to create a dynamic safety network that changes with the needs of your operations.


  • Detect up to seven gases simultaneously using 18 sensor options including PID
  • Reduce battery swapping with a typical run time of 7 days (168 hours)
  • Cut through high-noise environments with alarms that sound at 108 dB
  • Know what’s happening at a distance thanks to the largest display of any area monitor and customizable alarm action messages such as "EVACUATE" or "VENTILATE"
  • Increase worker safety with DualSense® Technology, which provides redundant protection by using two sensors to detect the same gas
  • Gain real-time visibility and respond faster in an emergency by pairing with the RGX® Gateway for live monitoring
  • Simplify maintenance and reporting with the DSXi Docking Station

Product Description

Area monitors need two things to be efficient: precise sensor technology to detect hazardous gases and the robustness to withstand long outdoor deployments. With the Radius BZ1, all critical technology pieces such as sensors, software, pumps, and wireless are part of the parenred SafeCoreTM module. Smart sensors are positioned face down to prevent the elements from interfering with gas readings resulting in fewer false alarms.The module slides out from the Radius BZ1 base for easy docking and automated maintenance ensuring that your sensors are always ready to provide accurate gas detection. The radius BZ1 base is made of durable, weather-resistant plastic. The base has built-in audio and visual alarms that grab workers attention, even in high noise enviroments. A large battery keeps the unit working as long as you do, and side-grip handels help make the base easy to move from location to location. The Radius BZ1 is available with optional lens wireless. with the LENS Wireless technology, your devices will connect once being turned on- with no need for setup or additional infastructure. You will recieve real time gas readings from other connected instruments on the network, helping your team react faster in emergency situations.

How to Calibrate the Radius BZ1

  1. For diffusion units, slide the prepared calibration cup into the gas path. Press firmly; verify that the calibration cup edge is flush with the surface of the SafeCore Module. For aspirated units, connect the calibration tubing to the pump inlet.
  2. Optionally skip the sensor. Apply calibration gas of the type and concentration stated on the instrument's display screen and indicated by the symbol ◄. Aspirated units can draw the gas as needed from a demand flow regulator.
  3. To start the flow of gas, turn the regulator's knob in a counter clockwise direction. Continue to follow the display-screen prompts to apply the requested calibration gas. At each prompt, if the gas is not sensed, the instrument will wait up to five minutes to accommodate a change of gas cylinders.
  4. If needed repeat for any failed sensor.
  5. Remove the calibration cup from the gas path: slide it away from the instrument and set aside or store forfuture use. For aspirated units, simply disconnect the tubing from the pump inlet.
  6. Stop the flow of gas: turn the regulator knob in a clockwise direction and tighten.

Standard Sensor Settings for the Radius BZ1

Sensor Type Calibration Gas Value Low Alarm High Alarm TWA Alarm STEL Alarm Part Number
H2S - Hydrogen Sulfide 25ppm 10ppm 20ppm 10ppm 15ppm 17156650-2
CO - Carbon Monoxide 100ppm 35ppm 70ppm 35ppm 200ppm 17156650-1
LEL - Methane Curve 25% LEL 10% LEL 20% LEL N/A N/A 17156650-L
O2 - Oxygen 18% VOL 19.5% VOL 23.5% VOL N/A N/A 17156650-3

Exotic Sensor Settings for the Radius BZ1

Sensor Type Calibration Gas Value Low Alarm High Alarm TWA Alarm STEL Alarm Part Number
SO2 - Sulfur dioxide 10ppm 2ppm 4ppm 2ppm 5ppm 17156650-5
NO - Nitric Oxide 25ppm 25ppm 50ppm 25ppm 25ppm 17156650-D
NO2 - Nitrogen Dioxide 25ppm 3ppm 6ppm 3ppm 5ppm 17156650-4
Cl2 - Chlorine 10ppm 0.5ppm 1ppm 0.5ppm 1ppm N/A
CLO2 - Chlorine dioxide 1ppm 0.1ppm 0.2ppm 0.1ppm 0.3ppm 17156650-8
CO2 - Carbon Dioxide 2.5% VOL 0.5% VOL 1% VOL 0.5% VOL 3% VOL 17156650-Q
HCN - Hydrogen Cyanide 10ppm 5ppm 10ppm 4ppm 4ppm 17156650-B
HCl- Hydrogen Chloride 10ppm 2.5ppm 5ppm 2.5ppm 2.5ppm 17156650-A
NH3 - Ammonia 50ppm 25ppm 50ppm 25ppm 35ppm 17156650-6
PH3 - Phosphine 1ppm 0.3ppm 0.6ppm 0.3ppm 1ppm 17156650-9
PID/COV 10.6ev Isobutoleyne 100ppm 100ppm 200ppm N/A N/A 17156650-R
H2 - Hydrogen 17156650-C