The HW‑group Gas Leak Sensor GS‑133 is a high‑precision, dual‑threshold gas detector designed for detecting flammable gases such as natural gas, methane, propane, butane, acetylene, and hydrogen. It provides reliable protection in sensitive IT environments such as server rooms and data centers, as well as in industrial facilities and buildings. Featuring optical and acoustic alarms along with a relay output, the sensor can be easily integrated into HW‑group monitoring systems.

Precise Gas Detection

Thanks to advanced sensor technology, the GS‑133 detects even small amounts of flammable gases, providing early warnings of potential hazards. Two individually adjustable threshold levels allow adaptation to different requirements – for example, a pre‑alarm for lower concentrations and a main alarm for higher gas levels.

Optical and Acoustic Alarms

The gas leak sensor immediately signals gas detection via a clearly visible LED indicator and an integrated acoustic alarm. Additionally, a potential‑free relay output (NO/NC, max. 0.5 A at 125 V AC) is provided for connection to HW‑group devices or external alarm systems. This makes it possible to trigger automatic safety responses – such as activating ventilation systems or shutting down gas‑fed installations.

Integration into HW‑group Systems

The GS‑133 can be seamlessly connected via digital inputs (dry contact) to Poseidon2, Ares, STE2, or Damocles units. Combined with these systems, it provides real‑time monitoring with alarm notifications transmitted over LAN, GSM, SNMP, or Modbus/TCP. Using the free HWg‑PDMS software, alarm data can be logged, analyzed, and exported directly to Excel.

Typical Applications

• Server rooms & data centers: Protection against gas leaks that could endanger infrastructure or equipment.
• Industrial facilities: Monitoring production halls, technical areas, or storage rooms with gas installations.
• Building management: Safety control in heating systems, utility rooms, and underground garages.
• Remote monitoring: Real‑time notifications via e‑mail, SMS, or SNMP trap.
• Safety‑critical environments: Explosion prevention through early detection of gas accumulation.

Technical Specifications

• Detection: Flammable gases (natural gas, methane, propane, butane, acetylene, hydrogen, etc.)
• Threshold levels: Two adjustable alarm stages
• Alarm indication: Optical LED & acoustic buzzer
• Output: Potential‑free relay contact NO/NC (max. 0.5 A at 125 V AC)
• Power supply: 12 V DC ± 10 %, max. 250 mA (external adapter required)
• Operating temperature: 0 °C to +50 °C
• Humidity: 5 % to 85 % (non‑condensing)
• Protection class: IP20
• Dimensions: 130 × 85 × 65 mm
• Weight: 250 g
• Connection: Digital input (dry contact) for Poseidon2, Ares, STE2

Easy Installation

Installation should be near potential gas sources such as heating systems, gas pipelines, or technical areas of a server room. The sensor operates on 12 V DC and connects to the monitoring system via a digital input. Adjustable thresholds enable flexible configuration according to the specific risk level.

With its high sensitivity, dual‑stage alarm capability, and versatile integration options, the HW‑group Gas Leak Sensor GS‑133 is the ideal solution for operators seeking reliable protection of IT and industrial environments against the dangers of flammable gases. It provides early warnings, minimizes risks, and can be easily incorporated into existing safety and monitoring structures.