Gas Leak Detection

GAS MONITORING CATEGORIES:

• Combustible/ Flammable Gas:
  • Explosive hazard.
  • To avoid an explosion, atmospheric levels must be maintained below the lower explosive limit (LEL) for each gas, or purged of oxygen.
  • Generally measured as 0-100% of the lower explosive limit or in part per million range.
  • Combustible gas monitors are designed to alarm before a potential explosive condition occurs.
  • e.g. Methane (natural gas), Butane, Propane, LPG, CNG, PNG, LNG, Petrol Vapour
• Toxic/ Irritant Gases:
  • Explosive hazard.
  • Hazardous to human health; worker exposure must be monitored.
  • Typically measured in the part per million (ppm) range.
  • Some toxic gas monitors can calculate the average exposure over time, providing short-term exposure limit (STEL) and time-weighted average (TWA) readings.
  • e.g. Carbon Monoxide, Hydrogen, Carbon Dioxide, Chlorine, Hydrogen Sulphide, Ammonia, Nitrogen Dioxide, SOx, NOx
• Asphyxiant (Oxygen):
  • Atmospheres containing too little oxygen (less than 19.5% oxygen by volume) are considered “oxygen deficient” and interfere with normal human respiration.
  • Atmospheres containing too much oxygen (more than 25% oxygen by volume) are considered “oxygen enriched” and possess an increased risk of explosion
  • Measured in the percent volume range (normal oxygen percentage in air is 20.8% by volume at sea level).
  • Oxygen monitors are generally set to alarm if the atmosphere contains either too little or too much oxygen.
• Industrial Gas Leak Detectors:Industrial Gas Leak Detectors is suitable for gas detection in Refineries, Chemical plant, LPG station, Gas Boiler, and Spray-Paints etc where gas leakage is possible. It reads the gas concentration in Air and transmits to a detection panel over digital bus. This detector, adopting semiconductor or catalytic gas sensor, has advantages of good reproducibility, good performance against changes in temperature and humidity. It has long life-span and easy operation. We provide optimal systems for a broad range of needs, from stand-alone Units for a single type of gas to large-scale systems integrating several hundred gas detectors.
• Commercial Gas Leak Detectors:Gas Leak Detector is positioned in such a way that gas leakage is detected as soon as possible. The output of the detector drives the control valve. Control Valve is fitted in the gas line. Once the leakage is detected, the valve cuts off the gas supply in less than 1 second by shutting off the valve. The valve can be reset or opened only manually then. This provides additional safety and allows manual inspection before resuming the gas supply. The detector also provides bargraph indication of concentration of the gas. Indication for four levels, i.e., 2.5%, 5%, 7.5% and 10% of volume are provided. Integrated flasher and buzzer provides indication when concentration crosses 10% of LEL. Commercial Grade Gas Leak Detectors use better quality sensors suitable for commercial use. Sensor is more reliable, consistent and accurate. These are also capable of integrating with Building Management Systems (BMS). They are useful in following applications