Compact, dual-gas monitor DuoIQ

DUOIQ

Art. number:
Date published 27.03.2026
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DuoIQ is a compact, dual-gas monitor designed to provide workers with versatile, reliable protection against multiple hazards. Built with a long-lasting rechargeable battery life and every major sensor technology, DuoIQ provides safety in environments where detecting two gases is critical but equipment size and cost need to be optimised.

optimised for safety and compliance 

  • DuoIQ integrates seamlessly with
    Crowcon Connect for real-time
    monitoring, compliance tracking, and
    asset management

  • Improves safety and ensures regulatory requirements are met

  • Effortlessly store and retrieve calibration certificates in Crowcon Connect to simplify audits

 FEATURES & BENEFITS

 Dual-gas detection

The only dual-gas detector with the capability to detect a wide range of gas combinations, providing flexibility for diverse applications without the need for bulky, multi-gas devices.

Extended battery life

DuoIQ boasts one of the longest battery lives of any dual-gas monitor, reducing recharge frequency and operational downtime. It offers up to one-month of use based on standard 8-hour shifts*. Between-shift charging keeps devices operational, with full recharge achieved in under 3 hours.

Pre-calibrated sensor trays

DuoIQ’s sensor trays are easy to swap, eliminating the need to send the device back to the manufacturer for maintenance. Additionally, the plug-and-play modular design provides flexibility to target different gases.

Comprehensive sensor technology

DuoIQ features unique sensor combinations, made possible by its wide variety of sensor technologies, including electrochemical, infrared (IR), pellistor, and long-life oxygen (O2) sensors.

Optimised for safety & compliance

DuoIQ integrates seamlessly with Crowcon Connect for real-time monitoring, compliance tracking, and asset management, improving safety and ensuring regulatory requirements are met. Effortlessly store and retrieve calibration certificates in Crowcon Connect to simplify audits.

 Lightweight, compact design

With its compact design, DuoIQ delivers reliable performance in a lightweight form - measuring just over 10cm in height and weighing only 135g**, ensuring portability and ease of use.

Bluetooth® & NFC connectivity

With Bluetooth ® and Near Field Communication (NFC) connectivity, DuoIQ can push data to Crowcon Connect via IQhub. This enables live data streaming, remote configuration, and detailed insights for enhanced safety and device performance.

One button for multiple functions

Single-button operation simplifies the user experience with quick, intuitive control, reducing complexity and learning curves, while making the device more widely accessible.

Size Standard: 96 x 55 x 32 mm
Deep tray: 106 x 55 x 32 mm
Weight 135g (Weight may vary depending on configuration)
Durability 6m drop test
Response Time (T90) <10s (sensor dependent)
Alarms Visual, vibrating, audible (95dB at 30cm), low/high, TWA, STEL
Display Backlit segment display
Data Logging Up to 500 event logs
Power & Battery

Tox / O2 | tox : 7 days, (20 days at 8 hour shifts)
Tox / O2 | IR: 1 day (4 days at 8 hour shifts)
Tox / O2 | Pellistor: 1 day (3 days at 8 hour shifts)

Recharge time: 0-80% 2 hours; 0-100% <3 hours

Sampling None
Operating Temperature Range -20 to +55°C (-4 to +131°F)
Humidity 0-95%RH
Ingress protection IP66 & IP68
Approvals

CSA US: Class I, Division 1, Groups A, B, C, D T4*
ATEX: Ex II 1G Ex ia IIC T4 Ga
IECEx: Ex ia da IIC T4 Ga
INMETRO: Ex ia IIC T4 Ga*
RED/FCC/IC: Wireless

*Pending

Calibration & Maintenance Automatic bump tests (<10 seconds)and calibrations (<30 seconds) through
IQhub; Manual bump and calibrations through device and PC software
Accessories Power cable (device to USB-A & USB-C); Flow plate; IQhub
Connectivity NFC & Bluetooth® (optional) required for connection to Crowcon Connect App for live data and configuration
Crowcon Connect Cloud-hosted web application for safety monitoring and asset management, offering real-time alarms, compliance dashboards, location tracking, device configurations, and essential reporting
Sensors Electrochemical, IR, Pellistor and Long life O2
Languages English
Warranty 2 years (sensor warranty separate)
 

Gas Range Resolution
Ammonia (NH3) 0-100ppm 0.1ppm
Butane (C4H10) 0-100% LEL 1% LEL
Carbon Dioxide (CO2) 0-2% volume 0.01% volume
Carbon Monoxide (CO) 0-250ppm 1ppm
Chlorine (Cl2) 0-10ppm 0.1ppm
Hydrogen Sulphide (H2S) 0-100ppm 0.1ppm
Methane (CH4) 0-100% LEL 1% LEL
Nitrogen Dioxide (NO2) 0-20ppm 0.1ppm
Oxygen (O2) 0-25% volume 0.1% volume
Ozone (O3) 0-1ppm 0.1ppm
Sulphur Dioxide (SO2) 0-20ppm 0.1ppm

 

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