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Overview
Multi-gas detectors have become standard equipment in confined space entry, industrial maintenance, and hazardous area monitoring — but not all of them are built for the full range of real-world demands that come with those applications. A detector that can only sample the atmosphere immediately around the worker is limited in confined space pre-entry work, where the hazard may be at the bottom of a tank or vessel before anyone enters. A detector with no connectivity offers no visibility to safety supervisors managing lone workers or remote teams. And a detector without fall detection provides no failsafe when a worker becomes incapacitated.
The S40 Portable Multi Gas Detector is built to address those specific operational gaps. It simultaneously supports both natural diffusion and active pump sampling, integrates 4G network connectivity for real-time remote monitoring and multi-device interconnection, includes a fall alarm for lone worker protection, and carries Ex IIb IIC T4 Gb hazardous area certification — all in a 475g encapsulated shell design rated to IP66.
What sets the S40 apart from conventional multi-gas detectors in this category is the combination of pump sampling capability, 4G networking, and fall alarm in a single certified device. Most portable multi-gas monitors offer one or two of these features. The S40 brings all three together — making it a genuinely capable instrument for operations where gas monitoring, connectivity, and lone worker protection need to work as an integrated safety system rather than separate solutions.
Key Features
Dual Sampling — Natural Diffusion and Pump
The S40 simultaneously supports both natural diffusion sampling for continuous personal protection and active pump sampling for remote atmosphere testing. The integrated micro suction pump includes fault detection, alerting the user if the pump is blocked or malfunctioning. In confined space pre-entry work, pump sampling allows the atmosphere inside a tank, vessel, or underground structure to be tested before anyone enters — which is the established safe practice for confined space entry programmes. The ability to switch between diffusion and pump sampling within the same instrument eliminates the need for a separate pre-entry survey instrument alongside the personal monitor.
4G Network Connectivity — Real-Time Remote Monitoring
The S40 supports 4G networking, enabling real-time gas reading transmission to a remote monitoring platform. Multiple devices can be networked and interconnected, allowing a safety supervisor or control room to monitor atmospheric conditions and worker status across a team simultaneously. For lone worker programmes, remote site operations, and large industrial facilities where workers are distributed across multiple zones, 4G connectivity transforms the S40 from a personal monitor into a node in a connected safety network — providing oversight that a standard standalone detector cannot.
Fall Alarm — Lone Worker Protection
The S40 includes a fall alarm that triggers when the device detects a sudden orientation change consistent with a worker falling. In confined space, lone worker, and remote site scenarios, a worker who is incapacitated by gas exposure, a medical event, or a physical accident may be unable to trigger a manual alarm. The fall alarm provides an automatic alert in exactly those situations — closing the gap between personal gas monitoring and broader lone worker safety protection.
Screen Flipping — Flexible Display Orientation
The S40 display supports screen flipping, allowing the reading orientation to be adjusted for different carrying positions and usage contexts. In practical field use — where the instrument may be clipped to a vest, held by hand, or positioned at varying angles during pump sampling — the ability to read the display correctly without adjusting grip or position is a meaningful usability feature that reduces the chance of misreading a gas concentration value under operational pressure.
HD Dot Array Display — 190×128 Resolution
The 190×128 HD dot array display provides clear, readable concentration values and instrument status information across all monitored gas channels simultaneously. In the field conditions where multi-gas detectors are used — low light, bright outdoor environments, gloves on — a high-resolution display that is readable at a glance reduces the cognitive load on the worker and the risk of misinterpreting a reading during a time-sensitive situation.
Contact Charging — No Connector Wear
Contact charging eliminates the physical connector wear that affects USB and proprietary charging port instruments used daily over extended periods. For instruments deployed in industrial environments across rotating shift patterns, connector-based charging points are a common failure mode that takes an instrument out of service at unexpected times. Contact charging provides a more durable daily-use charging mechanism for instruments used intensively across long deployment cycles.
Encapsulation Shell Design — IP66 Protection
The S40’s encapsulation shell design provides IP66 ingress protection — fully dust-tight and protected against powerful water jets from any direction. In the environments where multi-gas detection with pump sampling is most needed — confined space entry on industrial sites, underground infrastructure inspection, and outdoor hazardous area monitoring — IP66 protection ensures the instrument continues to operate reliably in wet, dusty, and chemically challenging conditions.
Technical Specifications
Model: S40
Display: HD Dot Array Screen 190 x 128
Sampling Method: Natural diffusion and pump sampling (simultaneous)
Weight: Approximately 475g
Dimensions: 186 x 86.5 x 58.6mm
Battery: 3600mAh Lithium battery
Working Time: ≤ 10 hours continuously
Charging Time: < 7 hours (contact charging)
IP Rating: IP66
Ex Grade: Ex IIb IIC T4 Gb
Alarm Types: Sound, Light, Vibration (optional) — TWA/STEL alarm, Fall alarm
Response Time: T90 ≤ 30 seconds
Wireless: 4G networking, multi-device interconnection
Working Temperature: -25°C to 55°C
Humidity Range: ≤ 95% RH (non-condensing)
Benefits
Pre-entry confined space atmosphere testing without a separate instrument. The pump sampling capability allows a safety supervisor or entrant to test the atmosphere inside a confined space before entry — from outside the space — using the same instrument that will be worn during the entry. This eliminates the need to carry and maintain a separate pre-entry survey instrument alongside personal monitors, simplifying the confined space entry equipment kit and reducing equipment cost.
Remote oversight of distributed teams through 4G connectivity. Safety supervisors and control room operators can monitor gas readings and worker status across a networked team in real time — without being physically present at each worker’s location. For large industrial sites, remote operations, and lone worker programmes, this connected visibility is a significant safety improvement over standalone devices that provide no remote monitoring capability.
Automatic lone worker protection through fall alarm. The fall alarm provides an automatic alert when a worker is incapacitated — covering the scenario where a worker cannot manually trigger an alarm due to gas exposure, medical event, or physical accident. For lone worker and confined space entry programmes, this closes a genuine gap in personal safety coverage that gas detection alone cannot address.
10-hour runtime covers extended shifts without mid-shift charging concern. The 3600mAh battery provides up to 10 hours of continuous working time — covering extended shifts, long confined space operations, and multi-site inspection days from a single charge. Contact charging ensures the instrument is ready for the next shift without the connector wear issues that affect port-charged instruments over extended daily use cycles.
30-second T90 response time — fast enough for dynamic hazard environments. A T90 response time of 30 seconds means the instrument reaches 90% of the actual gas concentration within half a minute of exposure — fast enough to provide a meaningful alarm in dynamic environments where gas concentrations can change rapidly, such as during confined space entry or process upset scenarios.
Who It’s For
The Confined Space Entry Supervisor at an Industrial Facility
You’re responsible for the pre-entry atmosphere assessment and continuous monitoring programme for confined space entry at a petrochemical, water treatment, or industrial maintenance operation. You need an instrument that can test the atmosphere inside the space before entry via pump sampling, provide continuous personal protection during entry via diffusion monitoring, and — if working within a lone worker or small team protocol — transmit readings to a supervisor via 4G. The S40 handles all three requirements in a single instrument, which simplifies your equipment specification and reduces the number of instruments your team needs to carry and maintain.
The Lone Worker Safety Manager at a Utilities or Infrastructure Operation
Your organisation deploys field technicians to remote or unmanned locations — pumping stations, substations, underground infrastructure — where they work alone with gas hazards present and no immediate colleague support available. You need gas monitors with 4G connectivity for real-time oversight and fall alarm capability for automatic incapacitation detection. The S40’s 4G networking and fall alarm make it the appropriate instrument for a lone worker programme that needs to address both atmospheric and personal safety monitoring in a single device.
The HSE Manager Specifying a Connected Gas Detection System for a Large Site
You’re standardising personal gas detection across a large industrial site and want to move beyond standalone devices to a connected system where multiple detectors feed real-time data to a central monitoring point. The S40’s 4G networking and multi-device interconnection capability supports that connected architecture — allowing you to build a site-wide atmospheric monitoring picture from a fleet of personal devices rather than requiring fixed infrastructure for every monitoring point.
Possible Applications
- Confined space entry programmes — Pre-entry pump sampling combined with continuous personal diffusion monitoring during tank, vessel, and underground structure entry
- Lone worker safety programmes — 4G-connected personal gas monitoring with fall alarm for field technicians working without immediate colleague support
- Oil and gas production facilities — Multi-gas personal protection across process units, with real-time data transmission to a central control room
- Wastewater and water treatment operations — Pre-entry atmosphere assessment and continuous monitoring for underground pump stations, manholes, and treatment structures
- Mining — surface and underground — Multi-gas monitoring with pump sampling capability for pre-shift atmosphere checking in underground workings
- Industrial shutdown and turnaround maintenance — Multi-gas personal protection during maintenance entry into process vessels, heat exchangers, and confined process equipment
- Remote and unmanned site inspection — 4G-connected atmospheric monitoring for field teams operating at remote locations without fixed detection infrastructure
- Emergency response and hazmat operations — Multi-gas detection with pump sampling for atmosphere assessment before emergency response teams enter unknown atmospheric environments
Trust and Certifications
Ex IIb IIC T4 Gb — Hazardous Area Certification
The S40 carries Ex IIb IIC T4 Gb certification — a recognised hazardous area classification for equipment used in locations where explosive gas atmospheres may be present. IIC group classification covers the most ignition-sensitive gas categories including hydrogen, meaning the S40 is certified for use across the broadest range of hazardous gas environments. T4 temperature class confirms the instrument’s surface temperature remains below the auto-ignition temperature of IIC group gases. For sites with formal hazardous area classifications, this certification is the procurement prerequisite that the S40 satisfies.
IP66 Ingress Protection
IP66 rating confirms full dust ingress protection and resistance to powerful water jets — the standard required for reliable outdoor industrial use and enclosed wet environments. For confined space entry and infrastructure inspection applications where water ingress is a realistic operating condition, IP66 provides meaningful protection assurance beyond basic splash resistance.
Micro Suction Pump with Fault Detection
The integrated micro suction pump includes active fault detection that alerts the user if the pump is blocked or malfunctioning. For confined space pre-entry testing, a pump fault that goes undetected could result in a failed atmosphere test being mistaken for a clear result. Pump fault detection is a direct safety feature — not just a maintenance convenience.
2-Year Warranty
Standard manufacturer warranty covering the instrument for 2 years from purchase. For a connected gas detection instrument deployed as part of a safety management system, a 2-year warranty provides procurement-stage assurance for the capital investment.
Authorised by Alright Engineering Solutions
The S40 is supplied through Alright Engineering Solutions Pte. Ltd., an authorised distributor of personal and portable gas detection equipment in Singapore. As a specialist gas detection supplier, Alright Engineering Solutions provides local procurement support, technical guidance on configuration and connectivity, and after-sales assistance for the Singapore and regional market.
Accessories and Variants
Contact Charging Dock
Contact charging eliminates connector wear for daily-use instruments. The charging dock provides a simple, repeatable charging process that keeps the instrument ready for the next shift without the connector fatigue issues associated with port-based charging on instruments used daily over extended deployment periods.
Pump Sampling Extension Tube
Extension tubes for the micro suction pump allow atmosphere sampling at greater distances from the instrument body — useful for pre-entry testing of deep tanks, vessels, and underground structures where the sampling point is beyond direct reach.
4G SIM Configuration
The S40’s 4G networking capability requires a SIM card and connection to a compatible monitoring platform. Contact Alright Engineering Solutions for guidance on SIM configuration, platform options, and multi-device network setup for your specific operational requirements.
Calibration Gas Kits
Available separately for multi-gas calibration across all monitored channels. Regular calibration against certified reference gases maintains detection accuracy and supports compliance with confined space entry and industrial hygiene monitoring programme standards.
Related Products from Alright Engineering Solutions
BELL LITE Multi Gas Detector — Simultaneous O2, CO, H2S and LEL personal monitoring with ATEX certification and BELLCONNECT app
BELLMINI Single Gas Detectors — Personal clip-on monitors for O2, CO, H2S, NH3, and a full range of toxic and specialty gases
BT-S100 Gas Leakage Detector — Probe-style handheld detector for gas leak location with USB-C data export
Get in Touch
If your operation requires multi-gas personal protection with pump sampling capability, 4G connectivity, or lone worker fall alarm functionality — whether for confined space entry programmes, remote site operations, or connected industrial safety systems — the S40 is worth a detailed evaluation.
Contact Alright Engineering Solutions to request a formal quote, discuss 4G network configuration for your site, or arrange a product demonstration for your safety team.
📍 3791 Jalan Bukit Merah #06-01, E-Centre @ Redhill, Singapore 159471
