Gas sensing
THE FUTURE OF WIRELESS GAS EMISSIONS MONITORING
S
ignalFire continues to demonstrate its commitment to customer-driven innovation with the release of the new AirQ Scout-LCD 900 MHz wireless gas detection system. Following the successful launch of the AirQ Scout in June 2025, customers requested a solution with local indication and visual alarming. SignalFire’s response is the all-new AirQ Scout-LCD, delivering powerful wireless gas monitoring with an integrated LCD display for real-time visibility in the field.
Designed for seamless integration with SignalFire’s 900 MHz gateways, the AirQ Scout-LCD features an advanced smart sensor that stores critical diagnostics directly on the sensor, including remaining life, calibration history, and serial number—all accessible via the built-in LCD. Pre-calibrated replacement sensors eliminate the need for field calibration, reducing maintenance time. By enabling real-time visibility into sensor health, the system supports more efficient, predictive maintenance and lowers overall operating costs. The initial release of the AirQ Scout-LCD is designed to monitor hydrogen sulfide (H₂S) concentrations from 0 to 100 ppm. Future versions will support additional gases, including carbon monoxide (CO), carbon dioxide (CO₂), and lower explosive limit (LEL) measurements for
KEY FEATURES OF AIRQ SCOUT-LCD:
Integrated smart gas sensor with internal diagnostics and stored calibration data
Local LCD with visual indication of gas level, sensor status, and remaining sensor life
Integrated keypad for zero and span calibration, bump testing, and alarm checks— no laptop or handheld required
900 MHz license-free ISM band radio with 0.5 mile (800 m) line-of-sight range
Continuous or scheduled (emissions) measurement modes with fast sensor sampling
Reports gas concentration plus sensor health and fault conditions to the supervisory system
Long-life 72 A/h Class I, Division 1 battery pack, field replaceable
IP65 industrial polycarbonate housing with integrated, protected antenna
Class I, Division 1 (pending), Groups C, D, T4 36 E various combustible gases.
With a wireless range of up to 0.5 miles (800 meters), the AirQ Scout-LCD enables gas detection in remote or hard-to-reach locations without the need for trenching or wiring. Its battery-powered design eliminates the need for external power supplies. For extended coverage, repeater nodes can be deployed to create a robust wireless mesh network. When paired with the PATRIoT Gateway, multiple gas readings can be seamlessly integrated into existing control systems using Modbus RTU, Modbus TCP/IP, MQTT/Sparkplug, or EtherNet/ IP. Users can also remotely monitor data through SignalFire Cloud, enabling real-time visibility, alarming, and reporting.
Engineered for hazardous environments, the AirQ Scout-LCD is pending Class I, Division 1 intrinsically safe certification. Its wireless design eliminates the need for IS barriers or additional components, simplifying installation and reducing system cost. Looking ahead, SignalFire’s product development team continues to expand its gas sensing capabilities, with additional sensor options planned based on ongoing customer feedback. “The AirQ Scout-LCD is a direct response to what our customers have been asking for—greater visibility and simpler operation in the field,” says Josh Schadel, SignalFire’s general manager. “It integrates seamlessly with existing SignalFire gateways, making it easy to add gas detection points without costly wiring, while new sites can be quickly deployed and connected to SCADA and remote monitoring systems.”
SignalFire Wireless Telemetry
www.signal-fire.com
EMERSON ADDS COMBUSTIBLE GAS DETECTION TO CORE WIRELESS SENSOR
merson has expanded the capabilities of its Rosemount 928 Wireless Gas Monitor by adding combustible gas detection, enabling percent lower
explosive limit (%LEL) monitoring over the secure WirelessHART platform. The update helps users monitor combustible hazards in remote or hard-to-wire locations without the need for additional power or costly signal wiring. “Adding combustible gas detection to the Rosemount 928 gives customers more flexibility as safety requirements evolve,” says Dave Ruhland, global flame and gas product manager for Emerson’s measurement instrumentation business. “Facilities can extend their wireless gas detection strategy to include combustible hazards on existing WirelessHART platforms – simplifying installation and supporting reliable monitoring in more hard-to- reach areas across their facilities.”
The updated Rosemount 928 device supports measurements from zero per cent to 100 per cent LEL, which gives users early warning and complete visibility into combustible gas hazards, helping them detect risks sooner and respond more effectively as conditions escalate. The combustible sensing technology is also designed to help reduce maintenance over time. Because the sensor does not rely on consumable elements, such as catalytic beads, that can degrade with repeated gas exposure, it can support longer service intervals and reduce the need for frequent recalibration. Secure WirelessHART communication transmits combustible gas data in real time, enabling deployment with no added power or signal wiring in hard-to-reach areas. The update is intended to complement existing gas detection programmes by helping teams add monitoring points in locations that may be logistically impractical or too costly to hardwire.
Emerson
emerson.com June 2026 Instrumentation Monthly
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