BW Flex 4 - Gas Detector
Whether you’re protecting workers or first responders — the BW Flex 4 Portable Multi-Gas Detector delivers the flexibility you need. Choose from more than 15 sensors to simultaneously detect up to 4 gas hazards.
REAL-TIME GAS READINGS AT A GLANCE
BW Flex features a large high-resolution display with readings available in a wide range of languages. Vital safety information is conveyed clearly and effectively, enabling faster decision-making to protect lives in hazardous environments. Its innovative design, compact size and ease of use builds on the legacy of Honeywell BW gas detection products.
INTELLIGENT SENSORS FOR INCREASED SAFETY & UPTIME
Honeywell BW Flex 4 Detector incorporates i-Series intelligent sensors which monitor sensor status and provide advanced predictive calibration, maintenance and end-of-life information in real-time. These advanced alerts help reduce the likelihood of failure and increase awareness so preventive action can be taken to avoid safety incidents and unexpected downtime.
SIMPLIFIED GAS REPORTING AND ANALYSIS
The Flex 4 Monitor can be paired with a smartphone easily via Bluetooth. Download the Honeywell Safety Suite Device Configurator app for quick and precise device management, maintenance, reporting and analysis. Increase productivity by simplifying tasks like recording incidents and save time with one-click download for all instrument data.
BW Flex 4 Detector Real Time Display

BW Flex 4 Multi-Gas Detector Specifications
- RELIABLE
Two months of battery runtime on a 4.5-hour charge with our new low-powered IR LEL sensor. No daily charging, no unexpected downtime.
- COMPATIBLE
The Honeywell BW Flex Gas Detector is compatible with the IntelliDoX instrument management system and Honeywell Safety Suite using Bluetooth for wireless configuration.
- ACCURATE
Low-power infrared LEL sensor is immune to silicone poisoning, which means accurate monitoring of combustibles.
- RESPONSIVE
1series sensors respond to dangerous gas levels in seconds, even in harsh temperatures.
Size: 4.29 x 2.44 x 1.7 in. / 108.2 mm x 61.5 mm x 43.2 mm (with Alligator Clip)
- Weight:
- 189 g (6.7 oz) with Catalytic LEL and Alligator Clip
- 186 g (6.6 oz) with IR LEL and Alligator Clip
- Working Temperature: -40°C to 60°C (-40°F to 140°F) with Catalytic LEL sensor
- Working Humidity: 5% to 95%
- Ingress Protection: IP66, IP68
Alarms and Type:
- Visual, Vibrating, Audible (95dB)
- Low, High, TWA, STEL
- Negative Drift, Over Limit, Multi-Alarm
- Device Warranty: Three-year warranty for sensors and detector
- Self-Test:
- Perform diagnostic of sensors, circuitry on activation
- Activated detector automatically performs an analog sensor diagnostic every 10 mins.
- Typical Battery Life: 40 days @ 8 hours of use per day with IR LEL or 15 hours per day with Catalytic LEL (with NDIR CH4 sensor)
- User Options:
- Change High, Low, TWA and STEL alarm points
- Latching alarms
- Set Calibration and/or bump test reminders
- Assign worker and location assignments
- Always on
- User options only available via Device Configuration and Safety Suite Device Configurator
Sensor Type | Measuring Range | Resolution |
---|---|---|
CO | 0 to 2000 ppm | 1 ppm |
H2S | 0 to 200 ppm | 1 ppm (can be set to 0.1 ppm) |
SO2 | 0 to 150 ppm | 0.1 ppm |
O2 | 0 to 30 %Vol. | 0.1 %Vol. |
NDIR-CH4 | 0 – 100 %LEL | 1 %LEL |
Catalytic LEL | 0 – 100 %LEL | 1 %LEL |
**Caution: The infrared LEL sensor used in Honeywell BW™ Flex cannot detect hydrogen and acetylene. For applications involving these combustible gases, please specify the catalytic type LEL sensor.
Find additional information direct from the Honeywell Website