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Overview
Nitric oxide is a gas most workers encounter without fully appreciating its risk profile. At low concentrations it’s colourless and largely odourless, but in industrial settings — combustion processes, chemical manufacturing, metal treatment, and engine testing environments — NO levels can climb quickly in poorly ventilated spaces. The added complication is that nitric oxide readily oxidises to nitrogen dioxide in air, meaning an NO exposure event can rapidly become a more complex multi-gas hazard. Personal monitoring is the only reliable way to catch this before it becomes a health incident.
The IGD BELLMINI NO Portable Single Gas Detector is designed to address this directly. It’s a personal clip-on monitor that tracks nitric oxide across the 0–250 PPM range and delivers an immediate alarm the moment concentrations approach the threshold set by your safety programme. It goes wherever the worker goes — which is the only kind of protection that makes sense when the hazard moves with the process.
Manufactured by International Gas Detectors (IGD), a UK-based specialist with decades of experience focused exclusively on gas detection, the BELLMINI NO combines ATEX Zone 0 certification, a 2-year maintenance-free battery life, and the BELLCONNECT Bluetooth app in one 105g unit. That combination — personal protection, regulatory compliance, and remote data management without additional hardware — is what separates this from most comparable devices in the portable NO detector category.
Key Features
Dedicated Nitric Oxide Detection — 0 to 250 PPM
The BELLMINI NO monitors nitric oxide across the full 0–250 PPM range. The OSHA permissible exposure limit for NO is 25 PPM as a ceiling value, and the NIOSH recommended exposure limit is 25 PPM TWA — meaning this detector is calibrated to catch problems at occupationally meaningful concentrations, not just at emergency levels. In combustion-heavy or chemical processing environments, early detection at low PPM is what prevents a manageable situation from becoming a serious exposure incident.
Triple Alarm System — Audible, Visual and Vibration
When NO levels breach configured thresholds, all three alarm channels activate simultaneously: a 100dB audible buzzer, multi-LED visual alerts, and a vibrating alarm. In industrial environments where hearing protection is standard, engine test cells where background noise is constant, or chemical plants where workers are focused on process tasks, a single-channel alarm is easily missed. The triple system ensures the alert reaches the worker regardless of conditions. Alarm levels cover Low, High, TWA, and STEL.
2-Year Battery Life — No Charging Infrastructure Needed
A 3.6V lithium battery runs the device for 24 months continuously without recharging. For operations deploying personal gas monitors across teams working rotating shifts, removing the daily charging requirement eliminates one of the most common failure points — a device sent into a shift with insufficient charge. A built-in confidence beep confirms the unit is live and operational without requiring the worker to check the screen.
IP68 Weatherproof and Dustproof
Full dust ingress protection and water submersion rating. Nitric oxide exposure is most common in industrial environments that are inherently tough on equipment — engine test facilities, metal treatment plants, chemical processing sites. The BELLMINI’s IP68 housing is designed to handle those conditions without needing careful treatment in the field.
BELLCONNECT Bluetooth App
Via Bluetooth Low Energy or NFC tap within 10 metres, the BELLCONNECT app gives complete remote management: calibration, bump testing, alarm setpoint configuration, device-to-worker assignment, and access to up to 200 event logs and 5,000 data records — all from a smartphone. Calibration certificates are produced automatically. For HSE teams managing compliance documentation, this removes a significant administrative burden.
SAFE Mode Display
When no NO is detected above alarm thresholds, the LCD can display “SAFE” — an immediate visual confirmation before entering an area where nitric oxide may be present. Pre-entry checks are faster and more reliable than relying on a separate handheld instrument.
One-Button Operation
All primary device functions are handled through a single button. There are no menus to navigate and no multi-step sequences to remember — the device is operable with gloves on and in situations where the worker’s attention needs to stay on the task rather than the monitor.
Replaceable Sensor and Battery
Both the NO sensor and the battery are field-replaceable on-site without returning the unit. When the sensor reaches end-of-life, a replacement is installed directly. This extends the usable life of the device body across multiple sensor cycles and keeps long-term per-unit costs predictable in a multi-year deployment.
Technical Specifications
Model: BELLMINI
Target Gas: Nitric Oxide (NO)
Detection Range: 0–250 PPM
Weight: 105g (with belt clip)
Display: FSTN LCD (1.6 inch)
Battery Life: 24 months (3.6V Lithium, size 2/3 AA)
IP Rating: IP68
Alarm Types: Visual (LED), Audible (100dB@10cm), Vibration — Low, High, TWA, STEL
Wireless: Bluetooth Low Energy (BLE), NFC
Response Time: 20 seconds (Toxic Gas)
Data Logging: Up to 200 alarm events, 5,000 data logs
Humidity Range: 5% to 95% RH (non-condensing)
Safety Approvals: ATEX, IECEx, KCs
App: BELLCONNECT (iOS and Android)
Benefits
Protection that follows the worker, not the workstation. Fixed NO monitors protect a point in space. The BELLMINI protects the individual — including in transit areas, adjacent zones, and any location where nitric oxide can accumulate without fixed detection coverage.
Compliance documentation without the manual effort. The BELLCONNECT app generates timestamped calibration certificates and bump test records automatically. When a regulatory inspection or internal HSE audit comes around, the documentation is already complete, attributed to the correct device and worker, and accessible immediately.
Eliminates the charging logistics problem. Across a 24-month battery life, a fleet of 25 BELLMINI units avoids hundreds of charging cycles — and the associated risk of a monitor going into a shift with an insufficient charge. No charging infrastructure means one fewer operational system to manage.
Individual exposure records, not anonymous device logs. Assigning each BELLMINI to a named worker through the app links NO exposure data to a person rather than a serial number. In the event of a health claim, regulatory inquiry, or internal incident review, the records are specific, dated, and defensible.
Better 5-year cost position than fixed-sensor alternatives. Field-replaceable sensors mean the device body runs across multiple sensor lifetimes. For procurement managers running total cost of ownership analysis across a multi-year deployment, this produces a meaningfully different number than competitors requiring full unit replacement at sensor end-of-life.
Who It’s For
The HSE Manager at a Chemical or Combustion-Process Facility
You’re responsible for personal protection across a site where nitric oxide is produced as a process byproduct or direct output. You need devices that are always operational, produce compliance records without manual intervention, and can be managed across a team from a central app interface. The BELLMINI NO and BELLCONNECT platform deliver all three without adding to your administrative workload.
The Technician Working in Engine Test Cells or Furnace Environments
You work in high-noise, high-temperature environments where NO is generated by combustion processes. You need a monitor that clips on at the start of the shift, runs without attention, and gives you an unmistakable alert if nitric oxide levels move into the dangerous range. The BELLMINI’s triple alarm system and 2-year battery mean it’s always ready and always audible — even against significant background noise.
The Procurement Manager Standardising Gas Detection Across a Fleet
You’re building a business case for a personal monitor deployment across 20–50 workers. ATEX certification, 2-year battery life, replaceable sensor design, and app-based compliance management are the four requirements on your specification. The BELLMINI NO addresses all of them in a single unit with a clear long-term cost advantage over alternatives.
Possible Applications
- Engine and turbine test facilities — NO generated by combustion in enclosed test cell environments with limited ventilation
- Chemical manufacturing plants — Nitric acid production and nitrogen compound processing where NO is a direct process output or byproduct
- Metal treatment and surface finishing — Acid pickling, etching, and anodising processes that release nitric oxide in enclosed treatment baths
- Fertiliser production facilities — Nitrogen-based fertiliser manufacturing where NO and NOx gases are generated at multiple process stages
- Power generation plants — Boiler and turbine operations producing NO as a combustion byproduct in enclosed plant rooms
- Welding and thermal cutting operations — High-temperature arc welding and plasma cutting generating nitric oxide in enclosed workshop environments
- Vehicle and emissions testing laboratories — Engine exhaust analysis environments with ongoing NO exposure risk during testing procedures
- Pharmaceutical and fine chemical synthesis — Nitration reactions and nitrogen compound synthesis processes requiring continuous personal atmospheric monitoring
Trust and Certifications
ATEX: Ex II 1G Ex ia IIC T4 Ga
ATEX is the European certification for equipment used in explosive atmospheres. Zone 0 classification — the most stringent level available — confirms the BELLMINI NO is approved for continuous use in locations where explosive gas is present. If your facility has any ATEX zone classification, this certification covers the highest level of hazard.
IECEx: Ex ia IIC T4 Ga
The globally accepted equivalent of ATEX, recognised in over 50 countries including Australia, the Middle East, and Asia-Pacific. For organisations with operations or customers across multiple countries, IECEx removes the need for separate national certifications in most jurisdictions.
KCs Certified
Korean industrial safety certification required for deployment in South Korean industrial facilities, and accepted as a recognised approval across a number of other Asian markets.
2-Year Manufacturer Warranty
Standard device warranty for 24 months from purchase. Sensor warranty terms are subject to individual sensor data. For a device deployed in daily industrial operations, a 2-year warranty provides procurement-stage assurance that the investment is protected.
IGD — International Gas Detectors
Based in Stockport, UK, IGD’s complete engineering focus is gas detection — fixed and portable systems for industrial clients worldwide. The BELLMINI range is the product of decades of specialist development in exactly this application. It is not a general instrumentation product; it was built specifically for industrial personal gas protection.
Accessories and Variants
BELLCONNECT App (Free — iOS and Android)
Essential for teams managing multiple devices across a site or fleet — calibration, bump testing, alarm configuration, data logging, compliance reporting, and worker assignment from one smartphone interface.
Alligator/Belt Clip (Included)
Positions the sensor correctly in the breathing zone throughout the shift. Attaches securely to work clothing, PPE vests, harnesses, or equipment straps without restricting movement.
Replacement NO Sensor Modules
Field-swappable when the nitric oxide sensor reaches end-of-life. Keeps the device body in continuous service and avoids the cost and lead time of full unit replacement.
Calibration Gas Kits
Available separately for on-site bump testing and full calibration. The BELLCONNECT app guides the process and generates a dated calibration certificate automatically on completion.
Available BELLMINI Variants
POR-GDIS-NO — Nitric Oxide (NO) | 0–250 PPM
POR-GDIS-NO2 — Nitrogen Dioxide (NO2) | 0–30 PPM
POR-GDIS-CO — Carbon Monoxide (CO) | 1–1000 PPM
POR-GDIS-H2S — Hydrogen Sulfide (H2S) | 0.1–100 PPM
POR-GDIS-O2 — Oxygen (O2) | 0.1–30% VOL
POR-GDIS-NH3 — Ammonia (NH3) | 1–100 PPM
POR-GDIS-SO2 — Sulfur Dioxide (SO2) | 0.1–20 PPM
POR-GDIS-HCN — Hydrogen Cyanide (HCN) | 1–50 PPM
POR-GDIS-O3 — Ozone (O3) | 0–5 PPM
POR-GDIS-COEX — Carbon Monoxide EX | 1–2000 PPM
Get in Touch
If nitric oxide monitoring is part of your site’s safety programme — whether you’re equipping a single team or rolling out personal detection across a larger operation — the BELLMINI NO is worth evaluating against your current setup.
Contact Alright Engineering Solutions to request a formal quote, arrange a product demonstration, or discuss volume pricing for team or fleet deployments.
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