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Overview
Fixed point gas detection is the foundation of any serious industrial gas safety system — and for combustible gases, it is often a regulatory requirement rather than an optional enhancement. In facilities handling natural gas, LPG, butane, or other hydrocarbon gases, a single undetected leak that reaches an ignition source can produce consequences that no amount of post-incident response can address. The challenge for safety engineers and facility managers isn’t recognising the need for fixed detection; it’s specifying a detector that delivers reliable, long-term performance in the specific process environment without generating nuisance alarms, requiring frequent calibration interventions, or creating an ongoing maintenance burden that undermines confidence in the system.
The GTYQ-S10 Fixed Gas Detector is a permanently installed combustible gas detector designed for exactly that application. It detects methane (CH4), propane (C3H8), and butane (C4H10) across a 3–100% LEL range with a ±3% LEL measurement accuracy, triggers relay output and RS485 signal on alarm, and is built for long-term continuous operation in industrial and commercial environments. It is designed to be installed once and relied upon — not constantly attended to.
The GTYQ-S10’s concrete differentiator in the fixed detector category is its modular sensor design with calibration-free replacement. When the sensor module reaches end-of-life, it is replaced with a pre-calibrated replacement module — no field calibration required after the swap. For facilities managing multiple fixed detectors across a site, calibration-free sensor replacement significantly reduces the maintenance time and specialist calibration resource required to keep the detection system operational at full accuracy. Three-point calibration capability is also available when precise calibration across the full LEL range is required for specific applications.
Key Features
CH4, C3H8, C4H10 Detection — 3 to 100% LEL
The GTYQ-S10 detects methane (natural gas), propane (LPG), and butane across the 3–100% LEL detection range with 1% LEL resolution and ±3% LEL measurement accuracy. The 3% LEL lower detection threshold means the alarm activates well before gas concentrations approach the flammable range — providing early warning at low concentrations where intervention is straightforward, rather than triggering only when the situation is already developing into an emergency. Dual alarm thresholds of 20% LEL (low alarm) and 50% LEL (high alarm) allow graduated response protocols to be implemented.
Modular Sensor Design — Calibration-Free Replacement
The GTYQ-S10’s modular sensor design allows the sensor module to be replaced when it reaches end-of-life without requiring field calibration after the replacement. Pre-calibrated replacement modules restore the detector to full accuracy specification immediately on installation. For facilities managing fixed detection across multiple points, calibration-free sensor replacement reduces the specialist resource requirement and downtime associated with scheduled sensor maintenance — making the ongoing maintenance of the detection system considerably more straightforward than detectors requiring field calibration after every sensor change.
RS485 Output and Free Contact Relay
The GTYQ-S10 provides both RS485 digital communication and free contact relay output. RS485 allows integration with a central control system, SCADA, or gas detection controller for continuous monitoring, data logging, and system-level alarm management. The free contact relay output allows direct connection to alarms, ventilation systems, solenoid shutoff valves, and other physical safety responses — providing both digital communication and hard-wired physical output in a single device. For safety system designers, this dual output capability simplifies integration into both modern networked safety systems and traditional hardwired safety circuits.
Three-Indicator Light Status Display
Three indicator lights on the detector head display the current working status — normal operation, low alarm, and high alarm — providing a local visual status indication that can be seen from a distance without requiring access to a central control panel. For operators carrying out visual inspections, maintenance walkthroughs, or emergency response across a large facility, immediate local status visibility is a practical safety feature that reduces the time between a detection event and an operational response.
Three-Point Calibration Capability
Maximum three-point calibration allows the detector to be calibrated across three concentration reference points — zero, mid-scale, and full scale — providing measurement accuracy across the full LEL detection range rather than just at a single reference point. For applications where accurate LEL concentration measurement across the full range is required — permit-to-work entry decisions, automated process interlock triggering, or formal safety instrumented system applications — three-point calibration provides the measurement confidence that single-point calibration cannot.
Light Alarm and Relay Output Signal
The GTYQ-S10 triggers a light alarm and relay output signal when gas concentrations breach alarm thresholds. The relay output signal connects directly to external alarm sounders, ventilation interlock systems, gas shutoff valves, or control room annunciators — enabling automated safety responses that don’t depend on a human noticing an alarm at a central panel. For unmanned plant rooms, remote equipment areas, and facilities where rapid automated response to gas detection is required, relay output integration is the feature that makes fixed detection into an active safety control measure rather than a passive monitoring device.
Long-Term Continuous Operation — ≤2W Power Consumption
The GTYQ-S10 operates in long-term continuous working mode with a power consumption of 2W or less. Low power consumption means the detector can be powered from standard instrumentation power supplies without dedicated high-capacity power circuits, and generates minimal heat in enclosed installations. For facilities running fixed detection continuously across multiple points on a single power supply loop, the GTYQ-S10’s low power draw simplifies power system design and reduces operating costs over the detector’s service life.
Technical Specifications
Model: GTYQ-S10
Target Gases: CH4 (Methane), C3H8 (Propane), C4H10 (Butane)
Detection Range: 3–100% LEL
Resolution: 1% LEL
Accuracy: ±3% LEL
Alarm Thresholds: Low alarm: 20% LEL | High alarm: 50% LEL
Output: RS485 / Free contact relay
Alarm Method: Light alarm, relay output signal
Sampling Method: Natural diffusion
Response Time: T90 ≤ 30 seconds
Sensor Life: > 2 years (subject to usage environment)
Power Supply: DC 24V ±3.6V
Power Consumption: ≤ 2W
Cable: 4×0.5mm² shielded wire
Weight: Approximately 820g
Dimensions: 154 × 138 × 66mm
Working Temperature: -40°C to 70°C
Working Humidity: ≤ 95% RH (non-condensing)
Working Pressure: 86–106 kPa
Benefits
Continuous detection without gaps — long-term continuous working mode. A fixed detector that requires frequent recalibration, sensor replacement, or maintenance intervention creates monitoring gaps and reduces the operational team’s confidence in the system. The GTYQ-S10’s long-term continuous working mode and calibration-free sensor replacement design minimise those gaps — the detector is reliably operational between scheduled maintenance visits, not dependent on calibration attention to remain functional.
Calibration-free sensor replacement reduces maintenance resource requirement. For facilities managing 10, 20, or 50 fixed detection points, the difference between a sensor replacement that requires a qualified calibration technician and one that simply requires module swap-out is a significant operational and cost difference across the fleet. The GTYQ-S10’s pre-calibrated replacement modules make sensor maintenance an in-house task rather than a specialist contractor requirement.
Automated safety response through relay output integration. Connecting the relay output to a solenoid gas shutoff valve, ventilation fan interlock, or external alarm sounder means the safety response to a gas detection event is automatic and immediate — not dependent on a person noticing an alarm at a panel and taking action. For unmanned plant rooms, remote equipment areas, and after-hours operations, automated response through relay integration is what makes fixed detection into active risk control.
RS485 integration into existing control and monitoring systems. RS485 output allows the GTYQ-S10 to be integrated into SCADA systems, gas detection controllers, building management systems, and safety control panels without additional signal conversion equipment. For facilities with existing RS485 monitoring infrastructure, the GTYQ-S10 connects directly to the network — simplifying installation and reducing integration cost.
-40°C to 70°C operating range — suitable for extreme temperature environments. The wide operating temperature range covers both cold climate outdoor installations and high-temperature process environments — a broader range than many fixed detectors in this class. For facilities in Singapore’s tropical humidity and temperature environment, or for process areas with elevated ambient temperatures, the GTYQ-S10 maintains detection accuracy without temperature-related performance degradation.
Who It’s For
The Safety Engineer Designing a Fixed Gas Detection System
You’re specifying fixed combustible gas detection across a new facility or upgrading an existing system. You need detectors that integrate with your central monitoring and control infrastructure via RS485, provide relay output for hardwired safety interlocks, and minimise the ongoing calibration resource requirement across a multi-point installation. The GTYQ-S10’s dual RS485/relay output and calibration-free sensor replacement design directly address those system design requirements.
The Facilities Manager Responsible for Gas Safety at a Commercial or Industrial Premises
You manage gas safety across a property with natural gas or LPG supply — a commercial kitchen, a manufacturing facility, or a building services plant room. You need fixed detection that provides continuous monitoring, triggers local and remote alarms when gas is detected, and doesn’t require specialist calibration contractors every time a sensor needs replacing. The GTYQ-S10’s three-indicator local status display, relay output alarm integration, and modular sensor design address your operational maintenance requirements.
The Gas Safety Installation Contractor
You design and install gas detection and shutoff systems across commercial and industrial premises as part of new build, retrofit, and gas safety upgrade projects. You need a fixed detector with clear RS485 and relay output specifications for straightforward integration into safety control systems, and a modular sensor design that future-proofs the installation for the client’s ongoing maintenance programme. The GTYQ-S10’s specifications, three-point calibration capability, and calibration-free replacement module design tick all three of those installation and commissioning requirements.
Possible Applications
- Commercial kitchen gas safety systems — Fixed CH4/LPG detection at cooking equipment manifolds, gas supply areas, and enclosed kitchen plant with relay output to solenoid shutoff valves
- Industrial boiler and heating plant rooms — Natural gas detection at burner equipment, gas supply connections, and enclosed plant rooms in commercial and industrial buildings
- LPG storage and distribution facilities — Propane and butane detection at storage vessel areas, cylinder storage rooms, and LPG filling and distribution points
- Gas meter rooms and utility areas — Fixed detection in enclosed gas meter installations, pressure regulation areas, and building gas supply entry points
- Petrochemical and refinery process areas — Hydrocarbon gas detection at process equipment, pipe flanges, and enclosed process areas requiring continuous LEL monitoring
- Automotive LPG and CNG stations — Fixed gas detection at fuelling points, compressor rooms, and storage areas in alternative fuel vehicle refuelling facilities
- Food processing facilities with gas supply — Natural gas detection at direct-fired process equipment, ovens, and gas supply areas in food manufacturing
- Tunnels and underground infrastructure — Fixed methane detection in road and rail tunnels, underground utility corridors, and enclosed infrastructure environments with natural gas leak risk
Trust and Certifications
±3% LEL Measurement Accuracy — Specified Performance Standard
A stated measurement accuracy of ±3% LEL provides a defined performance parameter for system design, alarm threshold setting, and procurement comparison. For safety instrumented system applications and permit-to-work entry decision support, a specified accuracy level is more useful than an unstated or implied performance level — and ±3% LEL is a competitive specification for a fixed combustible gas detector in this class.
Three-Point Calibration Capability
Maximum three-point calibration capability provides measurement accuracy across the full LEL range — relevant for applications where the detector output feeds directly into safety interlock systems, automated shutdown sequences, or formal safety instrumented function logic where concentration accuracy influences system response.
Modular Sensor — Calibration-Free Replacement
The calibration-free sensor replacement design eliminates a recurring specialist maintenance requirement that affects total cost of ownership across a multi-point fixed detection installation. For facilities budgeting gas detection system maintenance over a 5–10 year period, the difference between calibration-required and calibration-free sensor replacement is a meaningful lifecycle cost factor.
RS485 and Relay Output — Industry Standard Integration
RS485 is the industry-standard communication protocol for industrial gas detection systems — natively supported by the majority of gas detection controllers, SCADA systems, and building management system platforms. Free contact relay output is the standard hardwired signal interface for safety interlock systems. Both outputs use industry-standard interfaces that simplify integration without requiring proprietary controllers or signal converters.
Authorised by Alright Engineering Solutions
The GTYQ-S10 is supplied through Alright Engineering Solutions Pte. Ltd., an authorised distributor of fixed and portable gas detection equipment in Singapore. Alright Engineering Solutions provides local procurement support, system design guidance, installation assistance, and after-sales service for the Singapore and regional market.
Accessories and Variants
Replacement Sensor Module (Pre-Calibrated)
Pre-calibrated replacement sensor modules are available for scheduled sensor replacement at end-of-life. Calibration-free installation restores the detector to full accuracy specification immediately — no field calibration equipment or specialist calibration technician required.
Mounting Hardware and Junction Box
Wall and pipe mounting hardware for permanent installation. For installations requiring weather protection or cable management, compatible junction box enclosures are available — contact Alright Engineering Solutions for options suited to your installation environment.
4×0.5mm² Shielded Cable
The GTYQ-S10 requires 4×0.5mm² shielded wire for signal integrity in industrial environments with electrical interference. Using the specified cable type ensures RS485 signal quality and reliable relay output performance across the installation wiring run.
Calibration Gas Kits
Available separately for three-point calibration when full-range accuracy verification is required. Calibration gas kits are available for CH4, C3H8, and C4H10 reference concentrations — contact Alright Engineering Solutions for calibration gas specification matched to your detector configuration.
Gas Detector Controller / Central Monitor
The GTYQ-S10’s RS485 output is compatible with multi-channel gas detection controllers for centralised monitoring, alarm annunciation, and data logging across multiple fixed detection points. Contact Alright Engineering Solutions for compatible controller options for your system scale and application.
Related Products from Alright Engineering Solutions
BH-H5 Household Gas Alarm — Fixed residential/commercial CH4 alarm with relay solenoid valve output for light commercial and residential applications
BT-S100 Portable Gas Leakage Detector — Handheld probe detector for portable gas leak location surveys
K40 Portable Multi Gas Detector — Personal 4-gas portable monitor for field workers in areas covered by fixed detection systems
BELLMINI Single Gas Detectors — Personal clip-on monitors for individual gas hazards including CO, H2S, O2 for workers in gas-monitored areas
Get in Touch
If you’re specifying fixed combustible gas detection for a new installation, upgrading an existing system, or looking for a fixed detector that reduces the long-term calibration maintenance burden across a multi-point installation — the GTYQ-S10 is worth a detailed evaluation.
Contact Alright Engineering Solutions to request a formal quote, discuss system integration requirements for RS485 and relay output, or get technical guidance on detector placement and installation for your specific facility.
📍 3791 Jalan Bukit Merah #06-01, E-Centre @ Redhill, Singapore 159471
